IP Judge ipjudge.org
Guides
The concepts behind IP checks, with the evidence and a way to verify each one yourself.
No guide matches. Try another word.
Claude Code Not logged in, token expired, or API Error: 401: what to check first
A practical order for Claude Code login errors: credentials, system clock, macOS Keychain, network-home capacity, then network exit only when the exact error points there. Includes the v2.1.318 expiry fields.
Using AI accounts on mobile data: what a shared CGNAT IP means
Mobile data can place many subscribers behind one public IPv4 through carrier-grade NAT. Learn what 100.64.0.0/10 means, what an AI service sees, and how to investigate a verification notice.
Will HiNet, Taiwan Mobile, or Far EasTone IPs trigger AI account verification?
As of October 30, 2026, Taiwan is supported by ChatGPT and Claude. A HiNet, Taiwan Mobile, or Far EasTone name or ASN does not remove account, device, or integrity checks.
Anthropic and Claude IP addresses: which ranges to allowlist, and in which direction
Anthropic publishes fixed addresses for inbound connections (160.79.104.0/23 IPv4, 2607:6bc0::/48 IPv6) and stable outbound addresses (160.79.104.0/21). Five older addresses are phased out and should be removed from firewall rules. Inbound and outbound are different directions, and the AWS deployment uses different inbound ranges.
Which countries and regions does Claude support? The official list and how to check your exit
As of 2026-10-29, Anthropic's Supported Regions Policy lists 185 supported countries and regions. Mainland China, Hong Kong, Macau, Russia, Iran, Cuba, Belarus, Venezuela, Kosovo, Afghanistan, Syria and North Korea are not on the list. Taiwan is. Three tests decide it, and none of them is "can I connect".
Shared IP vs Dedicated IP: What Actually Changes, and When It's Worth Paying For
A shared IP and a dedicated IP differ in more than price: who else is on the same exit, and what they have done, shapes how that IP is scored by reputation lists and risk engines. Here are the three layers of sharing, what a neighbour can and cannot affect, how to check your own setup, and when a dedicated IP is worth it.
Can HKT, HKBN, CMHK, or 3HK access ChatGPT and Claude directly?
As of October 27, 2026, Hong Kong is absent from the official ChatGPT and Claude supported-location lists. An HKT, HKBN, CMHK, or 3HK brand or ASN does not change that location result.
Why AWS, Google Cloud, Azure, Oracle, or Vultr IPs may face AI verification
Cloud IP ownership is visible through official range feeds and ASNs, but ChatGPT and Claude publish no cloud-provider verification ranking. Identify the prompt and troubleshoot with official guidance.
AT&T vs Verizon vs Comcast vs Spectrum vs Frontier IPs for ChatGPT and Claude
ChatGPT and Claude do not publish ISP or ASN rankings. Compare the public registrations and small IP Judge samples for representative AT&T, Verizon, Comcast, Spectrum and Frontier networks.
Gemini CLI proxy settings: which exit matters for region errors?
Gemini CLI 0.46.0 checks HTTPS_PROXY, https_proxy, HTTP_PROXY, then http_proxy. Set the terminal path correctly, use .gemini/.env carefully, and separate transport, region, and authentication errors.
ChatGPT Voice won't connect or keeps spinning: the UDP 3478 and WebRTC connection
If typed chat works but ChatGPT Voice spins or cuts out, UDP is usually the problem. OpenAI's Help Center says Voice uses UDP port 3478, with TCP 443 as a fallback. What that has to do with WebRTC, why proxies make it worse, and what to check first.
Claude Code in WSL, Docker or on a remote server: which IP does it actually use?
Claude Code only reads https_proxy and friends from the environment it runs in. Inside WSL 2, a Docker container or an SSH session, your laptop's proxy is not inherited and 127.0.0.1 no longer means your machine. How to set the proxy address in each case and confirm the exit.
Claude Code 403 “Request not allowed” or region errors: what to check, in order
Claude Code showing API Error: 403 Request not allowed, App unavailable in region, or a 403 from the installer? Per the official docs there are four causes: a stray ANTHROPIC_API_KEY, subscription or role, an unsupported region, or a proxy. Start with /status.
ChatGPT account deactivated: OpenAI’s stated reasons, the appeal route, and what the terms say
As of 2026-10-01, OpenAI’s Help Center lists five reasons for deactivating an account: Usage Policy violations, Terms of Service breaches, security concerns, repeated violations after warnings, and incomplete identity or age verification. The official appeal route, what the form asks for, what the terms say, and how to check the exit chatgpt.com sees.
unsupported_country_region_territory: cause and how to check
That 403 means your region isn't on OpenAI's support list. The fix starts with checking which IP chatgpt.com and api.openai.com actually see — an IP checker saying you're fine doesn't mean they agree. Step-by-step checks inside.
Claude account disabled: Anthropic’s stated reasons, the appeal route, and what not to do
As of 2026-10-01, Anthropic’s Help Center lists three reasons for disabling a Claude account: repeated Usage Policy violations, creating an account from an unsupported location, and Terms of Service violations. The official appeal route, what the form asks for, what the terms prohibit, and how to check the exit Claude sees.
Stuck in a Cloudflare challenge loop on ChatGPT or Claude: causes and checks
A “Verify you are human” box or “Just a moment…” page that keeps coming back is Cloudflare, in front of ChatGPT and Claude. From Cloudflare’s and OpenAI’s docs: challenge types, signals, why loops happen, what you can check, and what only the site can change.
Cloudflare WARP and AI sites: what Claude and ChatGPT see when WARP is on
WARP swaps your exit for a Cloudflare IP shared by many users and located near you. claude.ai and chatgpt.com sit behind Cloudflare, and their diagnostic page says warp=on. What each WARP mode changes, what IP Judge shows, and what to do.
Codex CLI proxy: HTTPS_PROXY, “os error 61” and respect_system_proxy
Codex CLI ignores your system proxy and reads HTTPS_PROXY from the environment. Where to set it, the ~/.codex/.env trap, and how to fix “os error 61”.
DNS leaks: why your lookups still go to your local ISP behind a proxy
A DNS leak is when your traffic exits abroad but domain lookups still go to a resolver back home. What it reveals and to whom, how IP Judge detects it, the usual causes in the OS, proxy app, browser and IPv6, and how to fix them.
“User location is not supported for the API use”: why the Gemini API and AI Studio say your region isn’t supported
As of 2026-10-01, mainland China, Hong Kong and Macau are not on Google’s list for the Gemini API and AI Studio, though Hong Kong and Macau are on the Gemini web app list. Where this 400 FAILED_PRECONDITION error shows up, whose exit Google checks, the Colab rule, and how to check the exit of the machine calling the API.
Can you use Gemini in China or Hong Kong? What Google’s region lists say
As of 1 October 2026, Hong Kong, Macau and Taiwan are on Google’s list for the Gemini web app, and mainland China is marked Workspace only. The Gemini API and Google AI Studio use a separate list that includes Taiwan but not Hong Kong, Macau or mainland China.
iCloud Private Relay and AI sites: which IP they see, and when to turn it off
With iCloud Private Relay on, ChatGPT, Claude and Gemini in Safari see an Apple relay exit, not your own line. How it works, what it covers, where it isn’t offered, how IP Judge flags it with Apple’s public list, and Apple’s steps to turn it off for one site or one network.
IP blacklists (DNSBL): what they are, how to check, and what to do if you're listed
DNS blocklists were built to stop spam. How a lookup works, what Spamhaus, SpamCop and others actually list, which lists IP Judge checks and how it scores them, and how delisting works — including why you can't delist a shared exit.
IPv6 leaks: why your IPv6 exit is in a different region
On a dual-stack network, a proxy that only handles IPv4 lets IPv6 connections leave straight through your home line, and operating systems try IPv6 first by default. Why it happens, which AI sites have IPv6 addresses (checked 2026-10-01), how IP Judge detects it, and how to have the proxy take IPv6 or turn IPv6 off.
When your browser’s time zone and language don’t match your exit
Any web page can read your system time zone and browser languages without a permission prompt, and a proxy only changes your exit IP. What pages can read, what the platforms say publicly, how IP Judge checks and scores it, and how to align both in your OS and browser — with the trade-offs.
WebRTC leaks: what they are, how to test, and what each browser does
With a proxy on, a web page can still learn another public IP through WebRTC's STUN requests. What host, srflx and mDNS candidates reveal, how IP Judge tests for it, and how Chrome, Edge, Firefox, Safari and a proxy app's system-proxy and TUN modes handle it.
What is an ASN (Autonomous System Number)? How to tell which network an IP belongs to
An ASN is the number of an independent network on the internet. What autonomous systems and ASNs are, 16-bit vs 32-bit, who assigns them, how an IP maps to an ASN through routing announcements, and how to read IP Judge’s ASN and prefix pages.
Claude Code proxy settings: why the browser works but the terminal goes direct
Claude Code runs in a terminal and only reads https_proxy / HTTPS_PROXY / http_proxy / HTTP_PROXY. It ignores the macOS system proxy, doesn’t support SOCKS and doesn’t read ALL_PROXY. How to set it up and verify it.
What is an IP purity score? How to read it, and why checkers disagree
An IP purity or fraud score is not a standard — each checker adds up risk flags, IP type and blocklists its own way. What the score is made of, why the same IP scores differently, and which parts actually matter.
Muse sign-up guide: age check, invite codes and the waitlist
Muse is confirmed open only in the US and Canada (as of 30 September 2026) and needs a Meta account and an age of 18+. The sign-up steps, the waitlist page, age checks, invite code rules and official downloads.
Stuck on the Muse waitlist? Check these 5 things about your IP
Muse, Meta’s AI agent, is only open in the US and Canada. If sign-up says it’s not available in your country or puts you on the waitlist, the exit region, IP type and leaks are the first things to check.
Residential vs datacenter vs ISP IPs: what the difference is and how to check yourself
Why IP checkers disagree on whether an IP is residential, and three things you can check yourself: reverse DNS naming, registry (whois / RDAP) data and the network type.
Which IP do ChatGPT and Claude actually see? Why a clean US IP still gets blocked
Proxy apps route by domain, so the IP a checker sees may not be the one ChatGPT or Claude sees. How to read the exact IP each AI site sees, in the browser and in the terminal.