Claude IP Check

Whether you can use Claude comes down to region before it ever comes down to risk scoring. In its April 2026 update, Anthropic expanded official support to roughly 175 countries and regions, sharing one list across both Claude.ai and the commercial API. Anywhere outside that list returns a hard 'not available in your region / App unavailable' message no matter how clean your IP is. Two things to note: mainland China is not on the supported list, while Taiwan and Hong Kong are; explicitly excluded sanctioned regions include Russia, Belarus, Iran, North Korea, Syria, Cuba, and Crimea/Donetsk/Luhansk.

The logic is straightforward: Anthropic geolocates the exit IP of your current request, not the country you typed in at signup. So even if you registered successfully with a US email and US phone number, the moment your login exit IP resolves to an unsupported region you get blocked. This is exactly why so many people find it 'worked at signup, then stopped a few days later' — they switched networks and the exit IP's country changed.

Use the checker above to see which country/region your exit IP actually resolves to. IPOK shows how multiple sources (ip-api, ipapi.is, and others) judge your country, city, and ASN. If those sources disagree on your country, your route has shaky GeoIP to begin with — and shaky GeoIP makes Claude access intermittent.

Plenty of people sit on a US-geolocated IP and still can't get in. The problem is the IP's type, not its location. Anthropic's access controls split IPs into residential (assigned by ISPs to home broadband and mobile networks) and datacenter (the address ranges of AWS, Google Cloud, and assorted VPS/data centers). The latter is blocked almost by default. Most cheap VPNs and self-hosted cloud nodes run on datacenter IPs — right region, wrong type, still locked out.

The reasoning is simple. Datacenter ranges are publicly enumerable, and abuse, scraping, and bulk signups overwhelmingly originate from them, so blocking by range is the highest-leverage control there is. That means 'can I use Claude' is often equivalent to 'is my exit IP residential.' Residential and native mobile IPs have a markedly higher pass rate than pure datacenter ones.

The checker on this page returns a native vs. datacenter verdict and aggregates the hosting/datacenter and proxy/VPN flags from several sources (ipapi.is, proxycheck, IPQS, and more). If your IP is tagged datacenter or hosting, you can largely predict Claude won't let you through; conversely, a residential verdict with no proxy flags is the only way you've cleared this second gate.

The third class of problem is the sneakiest: you can open it, you can log in, but mid-use the account gets auto-disabled, typically with 'your account has been disabled after an automatic review of your recent activities.' This usually isn't a single region check — it's a behavioral trail, and one of the most common triggers is your exit IP's country jumping around in a short window.

A textbook trap: the same account logs in from Hong Kong in the morning, Singapore in the afternoon, and the US at night; or several accounts share one previously flagged proxy exit. From a risk-control standpoint, 'one account, many countries + shared exit' looks a lot like bulk account farming or account sharing, and it draws automated review. Even if each individual IP looks clean, the trail itself is the signal. Note that once an account is banned for violating regional policy, Anthropic's terms state payments are generally non-refundable.

The way to lower risk: stick to one route with a stable country of origin, residential type, and a clean reputation history, and stop hopping exits. Use the checker here to verify two things at once — whether your country attribution is stable and consistent, and whether this exit IP has a track record in AbuseIPDB, Scamalytics, StopForumSpam, and IPOK's own database (which includes Tor and known-abuse ranges). One clean, stable, residential route is far safer than constantly swapping nodes.

If you call the Anthropic API rather than the web app, the regional restriction still applies: the commercial API shares the same ~175-country list as Claude.ai, and your server's exit IP must resolve to a supported country. A frequent trap here: your laptop on a VPN opens the web app fine, but a backend deployed in some cloud region exits from a different country — possibly a restricted one — so it runs locally yet returns 401/region errors in production. Confirm your server's actual exit IP attribution before you pick a deployment region.

For web users there's an easily overlooked leak surface: WebRTC and DNS. Even after you route your HTTP traffic through a proxy, the browser's WebRTC can still expose your true local IP, and DNS queries may resolve locally — making your 'assumed exit' and your 'actually exposed exit' inconsistent. That inconsistency is itself an anomaly signal to risk engines.

Beyond an IP risk score, the checker on this page runs WebRTC/DNS leak detection: it confirms your browser isn't leaking your real IP and that your resolution path matches your proxy exit. Developers can also read the aggregated ASN, the native/datacenter verdict, and per-source risk flags to judge whether a route is fit for long-term Claude use. One note: IPOK does not log the specific IPs you check — results are for your eyes only.