Registered 4 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 39 ms.
Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

| A | 104.18.32.47 172.64.155.209 |
|---|---|
| AAAA | 2606:4700:4408::ac40:9bd1 2a06:98c1:3101::6812:202f |
| MX | 38 route2.mx.cloudflare.net 82 route3.mx.cloudflare.net 23 route1.mx.cloudflare.net |
| NS | hassan.ns.cloudflare.com savanna.ns.cloudflare.com |
| TXT | google-site-verification=rZodbEw8Hlw3gg7Z7mxkmQUNPnO_1khlohRX5D6qeUo google-site-verification=vHr-4wFDXLd3wze6i0YimpiGHC1u0Hy3x1dGAiyeHWs v=spf1 include:_spf.mx.cloudflare.net -all cerner-client-id=ff69e1b6-5936-420e-92dd-f14f67869424 google-site-verification=HJikIAHI_Z6zkRXg-TWAceem39v2AhOSwPwUWaTNt9E google-site-verification=u3JFUrrlvyiaVlGsdIRMgmuvDluR6gC-TIPBEQLbl8c google-site-verification=3p_zWfTXlQ4Mbxvq51ylW59LjgneYCB_vXpS-DLIEwM google-site-verification=qz8yKZH1f2h4Dl7S-nRAo0immoInmiosRhyjUxXuUOs |
| registrar | MarkMonitor Inc. |
|---|---|
| registered | 2022-11-30 |
| expires | 2026-11-30 |
| last changed | 2024-10-17 |
| owner | REDACTED FOR PRIVACY |
| nameservers | hassan.ns.cloudflare.com savanna.ns.cloudflare.com |
| status | client delete prohibited client transfer prohibited client update prohibited server delete prohibited server transfer prohibited server update prohibited |
| valid | yes |
|---|---|
| issuer | Let's Encrypt |
| covers | *.chatgpt.com, chatgpt.com, url7551.codex.chatgpt.com |
| protocol | TLSv1.3 |
Domain has DNSKEY but no DS record in parent zone
| SPF | pass v=spf1 include:_spf.mx.cloudflare.net -all |
|---|---|
| DMARC | pass policy reject |
| DKIM | none of 20 common selectors |
Whether mail claiming to be from this domain can be checked as genuine.
Green: clean. Red: listed. Grey: the list did not answer.
Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.
MCP: add https://how.is/mcp to Claude, Codex or Cursor
(one-line install) and ask for domain_trust on chatgpt.com.
Reference: /llms.txt.
Watch chatgpt.com. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.
Watch — $1 / 30 days