Ultra-fast Dual-Stack (IPv4/IPv6) & Network diagnostic tool.
(Measured at: 9/20/2026, 11:47:38 PM JST)
| Item | Detected Info |
|---|---|
| Connected IP |
216.73.216.21
|
| IPv4 Address |
Checking...
|
| IPv6 Address |
Checking...
|
| ISP / AS Network | Anthropic, PBC AS16509 |
| Protocol / TLS | HTTP/2 / TLSv1.3 |
| Proxy Status | Direct Connection |
| Location | Ohio, Columbus, US |
| Via Header | None |
| X-Forwarded-For | None |
| User Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| Cloudflare Ray ID | a3e1a0605e164af4 |
Supports instant dual-stack IPv4/IPv6 lookup and ISP detection directly from Cloudflare Edge.