Registered 22 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 160 ms.
Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

| A | 173.194.45.91 173.194.45.190 173.194.45.93 173.194.45.136 |
|---|---|
| AAAA | 2607:f8b0:4004:c23::be 2607:f8b0:4004:c23::5b 2607:f8b0:4004:c23::88 2607:f8b0:4004:c23::5d |
| MX | 0 smtp.google.com |
| NS | ns4.google.com ns1.google.com ns3.google.com ns2.google.com |
| TXT | v=spf1 include:google.com mx -all facebook-domain-verification=64jdes7le4h7e7lfpi22rijygx58j1 google-site-verification=QtQWEwHWM8tHiJ4s-jJWzEQrD_fF3luPnpzNDH-Nw-w |
| CAA | {'type': 'CAA', 'issue': 'pki.goog', 'critical': 0} |
| registrar | MarkMonitor Inc. |
|---|---|
| registered | 2005-02-15 |
| expires | 2027-02-15 |
| last changed | 2026-01-14 |
| owner | REDACTED FOR PRIVACY |
| nameservers | ns1.google.com ns2.google.com ns3.google.com ns4.google.com |
| status | client delete prohibited client transfer prohibited client update prohibited server delete prohibited server transfer prohibited server update prohibited |
| valid | yes |
|---|---|
| issuer | Google Trust Services |
| covers | *.google.com, *.appengine.google.com, *.bdn.dev, *.origin-test.bdn.dev, *.cloud.google.com, *.crowdsource.google.com, *.datacompute.google.com, *.google.ca, *.google.cl, *.google.co.in, *.google.co.jp, *.google.co.uk |
| protocol | TLSv1.3 |
Domain is not signed with DNSSEC
| SPF | pass v=spf1 include:google.com mx -all |
|---|---|
| DMARC | pass policy reject |
| DKIM | none of 1 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 youtube.com.
Reference: /llms.txt.
Watch youtube.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