IP, networking and protocol explainers from the Ip2Geo team.https://ip2geo.dev/en-ushttps://ip2geo.dev/blog/data-residency-explained/https://ip2geo.dev/blog/data-residency-explained/Data residency requirements mean storing user data in a specific country. The regulations driving this, technical patterns to comply, and the IP-routing implications.Sun, 31 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/deploying-ip-geolocation-in-edge/https://ip2geo.dev/blog/deploying-ip-geolocation-in-edge/Running IP-based personalization and security at the edge — close to users, with no origin round-trip. The patterns for major edge platforms.Sun, 31 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/health-checks-load-balancers/https://ip2geo.dev/blog/health-checks-load-balancers/Health checks decide which backends get traffic. The right checks save outages; the wrong ones cause them. Patterns for designing health checks that actually work.Sun, 31 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/service-mesh-explained/https://ip2geo.dev/blog/service-mesh-explained/Service mesh adds traffic management, security, and observability between services. The architecture, the trade-offs, and when it's worth the complexity.Sun, 31 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/currency-from-ip/https://ip2geo.dev/blog/currency-from-ip/Display prices in the visitor's local currency. The good and bad patterns, exchange rates, regulatory issues, and the pricing model that scales.Sat, 30 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-data-privacy-anonymization/https://ip2geo.dev/blog/ip-data-privacy-anonymization/GDPR and privacy best practices push for minimizing IP storage. The anonymization techniques, the trade-offs, and the patterns Google Analytics and others use.Sat, 30 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/sni-and-encrypted-client-hello/https://ip2geo.dev/blog/sni-and-encrypted-client-hello/SNI lets one IP host many HTTPS sites. ECH encrypts the SNI to hide which site you're connecting to. The mechanics and the privacy implications.Sat, 30 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/timezone-from-ip/https://ip2geo.dev/blog/timezone-from-ip/Server-side timezone detection from IP address: when it's accurate enough, when to combine with client-side, and how to render dates correctly.Sat, 30 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/tracking-cookies-vs-fingerprinting/https://ip2geo.dev/blog/tracking-cookies-vs-fingerprinting/Cookies are the old way of tracking users. Fingerprinting is the newer way that resists clearing. How each works, why fingerprinting is harder to defeat.Sat, 30 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/content-negotiation/https://ip2geo.dev/blog/content-negotiation/Accept, Accept-Language, Accept-Encoding — how HTTP clients tell servers what they want, and how servers decide what to return.Fri, 29 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/dns-zone-vs-record/https://ip2geo.dev/blog/dns-zone-vs-record/A DNS zone is a chunk of the namespace under one authority. A record is one entry. How they fit together, NS delegation, and zone management.Fri, 29 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/multicast-broadcast/https://ip2geo.dev/blog/multicast-broadcast/Broadcast sends to everyone on a network. Multicast sends to a group. The differences, the use cases, and why IPv6 abandoned broadcast.Fri, 29 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/rate-limiting-by-asn/https://ip2geo.dev/blog/rate-limiting-by-asn/Per-IP rate limits are noisy for CGNAT and shared infrastructure. Per-ASN rate limiting groups by network operator — and matches reality better.Fri, 29 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/tcp-handshake/https://ip2geo.dev/blog/tcp-handshake/Every TCP connection starts with a three-packet handshake. What each packet contains, what the state machine looks like, and what can go wrong.Fri, 29 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/geo-redirect-implementation/https://ip2geo.dev/blog/geo-redirect-implementation/Redirecting users to a regional version of your site based on IP location. The patterns that work, the SEO traps, and the UX considerations.Thu, 28 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/load-balancer-types/https://ip2geo.dev/blog/load-balancer-types/Load balancers split traffic across backends. L4 vs L7, the major cloud LB products, sticky sessions, health checks, and the operational trade-offs.Thu, 28 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/passive-os-fingerprinting/https://ip2geo.dev/blog/passive-os-fingerprinting/Tools like p0f infer a device's OS from TCP/IP packet quirks, without sending probes. How it works, what signals it uses, and the modern limits.Thu, 28 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/reverse-proxy-explained/https://ip2geo.dev/blog/reverse-proxy-explained/A reverse proxy sits in front of your application, handling TLS, routing, caching, and more. What it does, why it's standard, and the major options.Thu, 28 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/web-server-vs-app-server/https://ip2geo.dev/blog/web-server-vs-app-server/Web server, application server, reverse proxy — terms that get used interchangeably and shouldn't be. The distinct roles and how they fit together.Thu, 28 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ddns-explained/https://ip2geo.dev/blog/ddns-explained/DDNS lets you reach a host whose IP changes — home servers, remote workers, IoT. How it works, the providers, and when it's the right tool.Wed, 27 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-spoofing-explained/https://ip2geo.dev/blog/ip-spoofing-explained/IP spoofing means forging the source IP of a packet. How it works, why it's mostly impossible for normal application traffic, and where it still matters.Wed, 27 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipv6-address-types/https://ip2geo.dev/blog/ipv6-address-types/IPv6 has more address types than IPv4, each with its own scope and use. Global unicast, link-local, ULA, multicast — what each means and when you encounter them.Wed, 27 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/mac-address-explained/https://ip2geo.dev/blog/mac-address-explained/A MAC address identifies a network interface at the hardware level. Format, OUI, randomization, and why MAC is no longer the stable identifier it used to be.Wed, 27 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/vpn-protocols-compared/https://ip2geo.dev/blog/vpn-protocols-compared/The major VPN protocols in 2026: WireGuard, OpenVPN, IPsec, IKEv2. Speed, security, reliability — and why WireGuard has eaten so much of the market.Wed, 27 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/dhcp-explained/https://ip2geo.dev/blog/dhcp-explained/DHCP is the protocol that hands out IP addresses on every network you join. The DORA flow, lease semantics, and the surprising things DHCP also configures.Tue, 26 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/icmp-ping-traceroute/https://ip2geo.dev/blog/icmp-ping-traceroute/Ping and traceroute are the two most-used network tools. The ICMP protocol underneath, what each test actually proves, and how to interpret the output.Tue, 26 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-address-validation/https://ip2geo.dev/blog/ip-address-validation/Validating IP addresses sounds simple. IPv4 has a quirky number of forms; IPv6 is far worse. The right tools and patterns for production code.Tue, 26 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/network-glossary/https://ip2geo.dev/blog/network-glossary/ASN, BGP, CGNAT, MTU, OSPF, PoP, SNI, VRF — a working glossary of the network terms that come up in modern infrastructure work.Tue, 26 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/subnetting-cheatsheet/https://ip2geo.dev/blog/subnetting-cheatsheet/A practical reference for IPv4 subnetting: prefix lengths, host counts, common masks, and the conversions that come up in real network design.Tue, 26 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/bot-detection-strategies/https://ip2geo.dev/blog/bot-detection-strategies/Bots are 30-50% of internet traffic. The detection techniques that actually work in 2026, the limits, and how to combine signals.Mon, 25 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/http-status-codes-reference/https://ip2geo.dev/blog/http-status-codes-reference/Status codes communicate what happened. The five classes (1xx through 5xx), the most-used codes, and the ones developers get wrong.Mon, 25 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-allocation-explained/https://ip2geo.dev/blog/ip-allocation-explained/Where do IP addresses come from? The five-level allocation hierarchy from IANA to your ISP, why it matters for geolocation, and how to read the records.Mon, 25 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-vs-domain-vs-url/https://ip2geo.dev/blog/ip-vs-domain-vs-url/An IP is a number, a domain is a name, a URL is a request. Three layers of internet addressing that get conflated constantly. A clear breakdown.Mon, 25 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/private-ip-ranges-rfc1918/https://ip2geo.dev/blog/private-ip-ranges-rfc1918/RFC 1918 defines the IP ranges reserved for private networks. What each is, why they exist, common conventions, and how they interact with NAT and the public internet.Mon, 25 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/json-web-tokens-explained/https://ip2geo.dev/blog/json-web-tokens-explained/JWTs are signed claims you can verify without a database lookup. The structure, signing, verification, and the production pitfalls.Sun, 24 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/oauth2-flow-explained/https://ip2geo.dev/blog/oauth2-flow-explained/OAuth 2.0 is the standard for delegated authorization. The flows that matter in 2026, when to use each, and the security details that production systems get wrong.Sun, 24 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/rate-limiting-algorithms/https://ip2geo.dev/blog/rate-limiting-algorithms/The classic rate-limiting algorithms compared: how each works, where each shines, and the implementation details that matter at production scale.Sun, 24 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/redis-vs-memcached/https://ip2geo.dev/blog/redis-vs-memcached/Both are fast in-memory caches. Redis is richer; Memcached is leaner. The actual differences in 2026 and how to choose for your workload.Sun, 24 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/webhook-vs-polling/https://ip2geo.dev/blog/webhook-vs-polling/Webhooks push events from server to client. Polling pulls them. The trade-offs in latency, reliability, complexity — and the hybrid patterns that actually work.Sun, 24 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/dns-caching-explained/https://ip2geo.dev/blog/dns-caching-explained/DNS caching makes the internet scale. The layers of cache, how TTL controls freshness, negative caching, and why your DNS change isn't propagating.Sat, 23 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/cors-explained/https://ip2geo.dev/blog/cors-explained/CORS is the browser security mechanism that controls cross-origin requests. The why, the headers, the preflight dance, and the common mistakes that cost teams weeks of debugging.Sat, 23 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip2geo-vs-cloudflare-radar/https://ip2geo.dev/blog/ip2geo-vs-cloudflare-radar/Cloudflare Radar gives free aggregate internet traffic data. Ip2Geo gives per-IP geo and ASN lookups. They solve different problems — and they complement each other.Sat, 23 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/mobile-network-architecture/https://ip2geo.dev/blog/mobile-network-architecture/Mobile networks have their own internal architecture for routing IP traffic. PGW, SGW, IPv6-first cores, and what it means for geolocation and detection.Sat, 23 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/x-forwarded-for-header/https://ip2geo.dev/blog/x-forwarded-for-header/X-Forwarded-For tells you the original client IP behind proxies and load balancers. The semantics, the spoofing risk, and the safe patterns for trusting it.Sat, 23 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/geo-restriction-streaming/https://ip2geo.dev/blog/geo-restriction-streaming/Netflix, Hulu, BBC iPlayer — every streaming service restricts content by country. The licensing reasons, the technical enforcement, and the cat-and-mouse with VPNs.Fri, 22 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/internet-routing-tables-size/https://ip2geo.dev/blog/internet-routing-tables-size/Every router on the internet's backbone holds a copy of the global routing table. It's now ~1 million IPv4 routes plus ~200,000 IPv6 routes — and the size has real operational consequences.Fri, 22 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-reputation-scores/https://ip2geo.dev/blog/ip-reputation-scores/IP reputation is a numeric or categorical score summarizing how trustworthy an IP is. How scores are built, where they come from, and how to apply them in production.Fri, 22 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipv6-deployment-guide/https://ip2geo.dev/blog/ipv6-deployment-guide/Practical IPv6 deployment in 2026: dual-stack basics, addressing plans, DNS, firewall, application gotchas, and the path from IPv4-only to IPv6-only.Fri, 22 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/residential-proxies-explained/https://ip2geo.dev/blog/residential-proxies-explained/Residential proxies route traffic through real consumer devices, making the request look like a normal home user. The economics, the ethics, and the detection challenge.Fri, 22 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/bgp-hijacking-incidents/https://ip2geo.dev/blog/bgp-hijacking-incidents/BGP runs on trust. When that trust breaks — accidentally or deliberately — entire countries lose internet. A walk through the most consequential BGP hijacks and what they teach.Thu, 21 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipv4-exhaustion-marketplace/https://ip2geo.dev/blog/ipv4-exhaustion-marketplace/We officially ran out of IPv4 addresses years ago. So why does the internet keep working — and why do IPv4 blocks now sell for $40-60 each? A practical look at the IP marketplace.Thu, 21 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/mtu-mss-explained/https://ip2geo.dev/blog/mtu-mss-explained/MTU is the biggest packet size your network can carry. MSS is the biggest TCP payload that fits. When they mismatch, things break in subtle ways.Thu, 21 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ssh-explained/https://ip2geo.dev/blog/ssh-explained/SSH is the workhorse of remote access. The key model, the authentication flow, tunneling tricks, and the modern defaults you should use in 2026.Thu, 21 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/tcp-vs-udp/https://ip2geo.dev/blog/tcp-vs-udp/TCP is reliable and ordered. UDP is fast and unreliable. The right choice depends on what your application actually needs — and on the modern protocols built on top of both.Thu, 21 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/cdn-vs-edge-computing/https://ip2geo.dev/blog/cdn-vs-edge-computing/CDNs cache static content near users. Edge computing runs your code near users. The boundary, the trade-offs, and how to choose between them.Wed, 20 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/dns-over-https-vs-tls/https://ip2geo.dev/blog/dns-over-https-vs-tls/DoH and DoT both encrypt your DNS queries. They have different protocols, different deployment models, and different controversies. A practical comparison.Wed, 20 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/http2-vs-http3/https://ip2geo.dev/blog/http2-vs-http3/HTTP/2 multiplexed streams over TCP. HTTP/3 moved everything to QUIC over UDP. What changed, why, and what it means for your applications.Wed, 20 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/port-numbers-explained/https://ip2geo.dev/blog/port-numbers-explained/Ports are 16-bit numbers that multiplex many services onto a single IP. The three port ranges, what each is for, and the operational implications.Wed, 20 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ssl-tls-handshake/https://ip2geo.dev/blog/ssl-tls-handshake/TLS sets up an encrypted channel in a few round trips. The 1.2 and 1.3 handshakes, what each message does, and why TLS 1.3 is dramatically faster.Wed, 20 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ddos-protection-basics/https://ip2geo.dev/blog/ddos-protection-basics/A practical primer on DDoS attacks, the layers where they hit, and the defenses that actually work — without becoming a network engineer.Tue, 19 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/how-tor-works/https://ip2geo.dev/blog/how-tor-works/Tor routes your traffic through three encrypted relays so no single party knows both who you are and what you're doing. How the layers work, what they do — and don't — protect.Tue, 19 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-blocklists-allowlists/https://ip2geo.dev/blog/ip-blocklists-allowlists/Blocklists and allowlists are simple in concept and easy to misuse. The patterns that work, the traps to avoid, and where ASN data does the job better.Tue, 19 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/webrtc-ip-leak/https://ip2geo.dev/blog/webrtc-ip-leak/WebRTC can reveal a user's real IP even behind a VPN. How the leak works, why it exists, and how to mitigate it in your application or browser.Tue, 19 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/whois-lookups/https://ip2geo.dev/blog/whois-lookups/WHOIS is the authoritative record of who owns an IP block. How it works, what fields you actually get, and how to use it alongside geolocation.Tue, 19 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/anycast-vs-unicast/https://ip2geo.dev/blog/anycast-vs-unicast/Anycast lets one IP address serve users from many physical locations simultaneously. How it works, why CDNs love it, and the implications for IP geolocation.Mon, 18 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/detect-mobile-vs-desktop-visitors/https://ip2geo.dev/blog/detect-mobile-vs-desktop-visitors/Reliable methods to detect mobile vs desktop visitors — User-Agent parsing, client hints, IP/ASN signals — with the gotchas and the limits of each.Mon, 18 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/internet-exchange-points/https://ip2geo.dev/blog/internet-exchange-points/Internet Exchange Points are the physical hubs where networks meet to swap traffic. Here's what they are, why they matter, and how they shape internet performance and IP routing.Mon, 18 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/detect-country-from-ip-address/https://ip2geo.dev/blog/detect-country-from-ip-address/Detecting the country from a visitor's IP address — when it works, when it doesn't, and the production-ready patterns in every major backend language.Mon, 18 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/proxy-types-explained/https://ip2geo.dev/blog/proxy-types-explained/A complete guide to proxy types — HTTP, SOCKS, transparent, reverse, forward, residential, datacenter — what each one does, when each is used, and how to identify them in your traffic.Mon, 18 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/bgp-routing-explained/https://ip2geo.dev/blog/bgp-routing-explained/Border Gateway Protocol is the system that decides where every packet on the internet goes. Here's how it works, why it's both essential and weirdly fragile, and what it means for your application.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/caching-ip-geolocation-api-responses/https://ip2geo.dev/blog/caching-ip-geolocation-api-responses/How to cache IP geolocation responses correctly — in-memory, Redis, CDN edge — with TTL guidance, invalidation patterns, and the math of why caching is the single biggest cost-cutter for IP enrichment.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/dns-record-types-reference/https://ip2geo.dev/blog/dns-record-types-reference/Every DNS record type you'll actually encounter, what each one does, the syntax you'll see, the gotchas, and when each one matters.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/free-vs-paid-ip-geolocation-apis/https://ip2geo.dev/blog/free-vs-paid-ip-geolocation-apis/When the free tier of an IP geolocation API is enough, when you need to upgrade, and what to look at when you do — without overpaying for capacity you'll never use.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/gdpr-and-ip-addresses/https://ip2geo.dev/blog/gdpr-and-ip-addresses/IP addresses are personal data under GDPR. Here's what that actually means for engineering teams, what you need to do differently, and what's still legal.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/geo-personalization/https://ip2geo.dev/blog/geo-personalization/How to use IP-based geolocation to personalize the first impression of your product — currency, language, content, calls to action — without being creepy about it.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/geofencing-101/https://ip2geo.dev/blog/geofencing-101/How to implement country-based content restrictions in your app — the IP geolocation basics, the legal angles, the failure modes, and the right way to handle edge cases.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/how-dns-lookup-works/https://ip2geo.dev/blog/how-dns-lookup-works/A complete, practical guide to DNS lookups: how the resolution chain works, every record type that matters, and how to run lookups from the command line or a browser.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/how-to-block-vpn-and-proxy-users/https://ip2geo.dev/blog/how-to-block-vpn-and-proxy-users/Detecting and blocking VPN, proxy, and Tor users from your application: techniques that actually work, the false-positive trap, and when blocking is the wrong answer.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/how-to-find-a-domains-ip-address/https://ip2geo.dev/blog/how-to-find-a-domains-ip-address/Five practical ways to resolve any domain name to its IP address, from one-line terminal commands to scripting libraries and browser tools — with the caveats nobody mentions.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/hidden-costs-of-geolite2/https://ip2geo.dev/blog/hidden-costs-of-geolite2/MaxMind's free GeoLite2 database looks like a no-cost solution to IP geolocation. The reality: real ongoing engineering work, accuracy degradation, and operational overhead that often costs more than a hosted API.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/how-to-geolocate-an-ip-address/https://ip2geo.dev/blog/how-to-geolocate-an-ip-address/From free GeoLite2 databases to commercial APIs, here's an honest look at the five ways developers actually geolocate IPs in 2026 — including accuracy, latency, and total cost of ownership.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-based-fraud-detection/https://ip2geo.dev/blog/ip-based-fraud-detection/How to use IP intelligence — country, ASN, VPN/proxy detection, velocity — as a signal in fraud detection without falling into the false-positive trap.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-geolocation-accuracy/https://ip2geo.dev/blog/ip-geolocation-accuracy/What 'accurate IP geolocation' actually means, where the limits are, and why claiming city-level accuracy is mostly marketing — with practical guidance on how to use each level.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-geolocation-api-pricing-comparison/https://ip2geo.dev/blog/ip-geolocation-api-pricing-comparison/An honest comparison of IP geolocation API pricing in 2026 — MaxMind, IPinfo, ipstack, IP-API, IPGeolocation, IPdata, and Ip2Geo — with a clear breakdown of free tiers, per-request costs, and what you actually get.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-geolocation-in-nodejs/https://ip2geo.dev/blog/ip-geolocation-in-nodejs/How to add IP geolocation to a Node.js application — from one-line HTTP calls to Express middleware, edge functions, and TypeScript SDKs — with real code you can ship.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-geolocation-in-python/https://ip2geo.dev/blog/ip-geolocation-in-python/How to add IP geolocation to a Python application — using requests, the Ip2Geo SDK, Django and FastAPI middleware patterns, async clients, and caching that actually works.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipinfo-vs-maxmind-vs-ip2geo/https://ip2geo.dev/blog/ipinfo-vs-maxmind-vs-ip2geo/A head-to-head comparison of the three most-mentioned IP geolocation providers — what each is good at, where each falls short, and how to pick the right one for your stack.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ip-geolocation-in-php/https://ip2geo.dev/blog/ip-geolocation-in-php/How to add IP geolocation to a PHP application — using cURL, Guzzle, the Ip2Geo PHP SDK, Laravel middleware, and the patterns that actually scale in WordPress and Symfony.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/nat-and-cgnat-explained/https://ip2geo.dev/blog/nat-and-cgnat-explained/How NAT and CGNAT actually work, why your public IP isn't really yours, and what these systems mean for self-hosting, gaming, fraud detection, and IP geolocation.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/public-ip-vs-private-ip/https://ip2geo.dev/blog/public-ip-vs-private-ip/The difference between public and private IP addresses, why your laptop has two of them at once, and what it means for networking, security, and accessing your own devices.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/rate-limiting-ip-lookup-api/https://ip2geo.dev/blog/rate-limiting-ip-lookup-api/How to rate-limit IP geolocation usage in your application — per-user, per-key, per-IP — without breaking legitimate traffic. Token buckets, sliding windows, and the bugs nobody warns you about.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/reverse-dns-ptr-explained/https://ip2geo.dev/blog/reverse-dns-ptr-explained/Reverse DNS (PTR records) — how it works, why it matters for mail servers, when it's useful for investigating IPs, and why you can't set your own PTR for an arbitrary IP.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/subnet-mask-cidr-explained/https://ip2geo.dev/blog/subnet-mask-cidr-explained/Subnet masks, CIDR notation, and what /24 actually means — explained for developers who keep nodding along when network people say '10.0.0.0/16' without ever feeling sure what it means.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/what-is-an-asn/https://ip2geo.dev/blog/what-is-an-asn/ASNs are the numbers that hold the internet together. Here's what they are, how BGP uses them to route every packet, and why anyone working with IP addresses runs into them eventually.Sun, 17 May 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipv4-vs-ipv6-the-great-transition/https://ip2geo.dev/blog/ipv4-vs-ipv6-the-great-transition/Comparison of IP versions 4 and 6, covering address exhaustion and technical differences between 32-bit and 128-bit systems.Tue, 06 Jan 2026 00:00:00 GMThttps://ip2geo.dev/blog/ipv6-the-future-of-internet-addressing/https://ip2geo.dev/blog/ipv6-the-future-of-internet-addressing/Explores how IPv6's 128-bit addressing system is shaping the future of internet connectivity.Tue, 06 Jan 2026 00:00:00 GMThttps://ip2geo.dev/blog/the-backbone-of-the-internet-understanding-ipv4/https://ip2geo.dev/blog/the-backbone-of-the-internet-understanding-ipv4/Understanding IPv4: the foundational protocol that powers internet communication worldwide.Tue, 06 Jan 2026 00:00:00 GMThttps://ip2geo.dev/blog/what-is-fiber-optic/https://ip2geo.dev/blog/what-is-fiber-optic/Explores fiber optic technology, explaining how light-based signals create next-generation internet connectivity.Tue, 06 Jan 2026 00:00:00 GMThttps://ip2geo.dev/blog/why-fiber-optic-is-better-than-the-normal-one/https://ip2geo.dev/blog/why-fiber-optic-is-better-than-the-normal-one/Article contrasts fiber optic with traditional copper cables, explaining technological advantages.Tue, 06 Jan 2026 00:00:00 GMThttps://ip2geo.dev/blog/everything-you-need-to-know-about-ip-addresses/https://ip2geo.dev/blog/everything-you-need-to-know-about-ip-addresses/A comprehensive guide to IP addresses: what they are, how they work, and why they matter.Sat, 01 Mar 2025 00:00:00 GMT