Registered 31 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 63 ms.
Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

| A | 172.253.63.113 172.253.63.102 172.253.63.101 172.253.63.138 172.253.63.100 172.253.63.139 |
|---|---|
| AAAA | 2607:f8b0:4004:c08::65 2607:f8b0:4004:c08::66 2607:f8b0:4004:c08::8b 2607:f8b0:4004:c08::64 |
| MX | 20 alt1.aspmx.l.google.com 40 alt3.aspmx.l.google.com 30 alt2.aspmx.l.google.com 50 alt4.aspmx.l.google.com 10 aspmx.l.google.com |
| NS | ns2.google.com ns3.google.com ns1.google.com ns4.google.com |
| TXT | google-site-verification:bqEukzgde2Z8kr2wk5OKZNrYrefPAHaoLYBFsi1ShK8 spf2.0/pra ?all v=spf1 mx ?all |
| CAA | {'type': 'CAA', 'issue': 'pki.goog', 'critical': 0} |
| registrar | MarkMonitor Inc. |
|---|---|
| registered | 1996-01-16 |
| expires | 2027-01-17 |
| last changed | 2025-12-16 |
| 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 | *.doubleclick.net, *.2mdn.net, *.au.doubleclick.net, *.cc-dt.com, *.de.doubleclick.net, doubleclick.com, *.doubleclick.com, *.fls.doubleclick.net, *.fr.doubleclick.net, *.jp.doubleclick.net, *.uk.doubleclick.net, ad.mo.doubleclick.net |
| protocol | TLSv1.3 |
Domain is not signed with DNSSEC
| SPF | warning v=spf1 mx ?all |
|---|---|
| DMARC | warning policy none |
| 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 doubleclick.net.
Reference: /llms.txt.
Watch doubleclick.net. 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