On no blocklists we checked, valid HTTPS, the site answered 200 in 296 ms.
Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

| A | 141.193.213.20 141.193.213.21 |
|---|---|
| MX | 10 alt3.aspmx.l.google.com 5 alt2.aspmx.l.google.com 5 alt1.aspmx.l.google.com 1 aspmx.l.google.com 10 alt4.aspmx.l.google.com |
| NS | adns3.berkeley.edu adns2.berkeley.edu adns1.berkeley.edu |
| TXT | klaviyo-site-verification=SWYLuM brevo-code:ee0b01818d57850991280d3999efc841 ZOOM_verify_RirbP7N1QWC3Zzm02oL4Cw jamf-site-verification=2jicltwxCxH93ep4OhO0dA google-site-verification=fL93jj-VPnl_5wdFDh26YshzKVPraWAurHaBCu-k-Xw brevo-code:c6f4c03d44819f8975dc05ff6b3df3a9 docusign=25bb9bc1-b377-48ce-a907-61472fca6261 google-site-verification=C4YkQW0t-gtD5FpVWdjxAipEUofVb2p0KmW3xFaUJeA google-site-verification=loQrJWyMsMB249uINb-AsRGTWVoLdTc44Td3aMGn-NE apple-domain-verification=ZDtApcKYPmKfYxn4 google-site-verification=R5hbazPMfJqtXtm6OHprlDpBnSThQvYDrt-i-IqZvjE atlassian-domain-verification=RIwGoMGAwFoHKm3AJg0bhFvuzEkRseqI6LStzthTqt4dWfA6Mqm5OCHFbZd1BJ9e iContact1583632 iContact1462072 iContact1393487 MS=ms37758698 adobe-idp-site-verification=a113c870-3c49-4b4a-b3a4-31e1cf1860cb sending_domain102272=da1fdb1bce80fcb235c498ec3ad47745fed6ea7c6dc03752d88318531e6b07b7 brevo-code:a2b2aef0282cf9caec92be7bed7630ad canva-site-verification=HJ933woS6KmNfYtvOaJHZA MS=ms19521665 brevo-code:e1e8345a4a2352cdbd9d6979093f2aec 896263912-18360412 v=spf1 include:_spf.berkeley.edu include:_spf2.berkeley.edu include:_spf.google.com include:_spf.qualtrics.com include:servers.mcsv.net include:spf.mailjet.com a:c.spf.service-now.com ~all docusign=31f4475e-737f-4a3a-b6ea-60b1ac273c95 MS=10BE0CF63C8BD5AFF9A6EF7B71763B098A905719 google-site-verification=CDuttEoV44OF0dD7qwidnTj3wvYxIPz05W6MKEZfKYc amazonses:IuakF7FVH1Y7h0Kap7krqHwRvoXFOzSET+Ri1VBHziA= |
| valid | yes |
|---|---|
| issuer | Google Trust Services |
| covers | berkeley.edu |
| protocol | TLSv1.3 |
Domain is properly signed — chain validated by an independent validating resolver
| SPF | pass v=spf1 include:_spf.berkeley.edu include:_spf2.berkeley.edu include:_spf.google.com include:_spf.qualtrics.com include:servers.mcsv.net include:spf.mailjet.com a:c.spf.service-now.com ~all |
|---|---|
| DMARC | pass policy reject |
| DKIM | found: google, k1, s1, s2, mail |
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 berkeley.edu.
Reference: /llms.txt.
Watch berkeley.edu. 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