How is claude.com?

Looks fine risk 0/100

Registered 31 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 249 ms.

Why

02050100

finecarefulhigh risk

·Nothing in the checks added risk.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.

Site

200

249 ms

HTTPS

49 d

left on a Google Trust Services certificate

Age

31 years

registered 1995-05-24

Blocklists

listings across 5 lists

Everything we looked at

DNS records4 record types

A	160.79.104.10
AAAA	2607:6bc0::10
NS	randy.ns.cloudflare.com isla.ns.cloudflare.com
TXT	google-site-verification=QZP3DPlaFGwYlsM6Eqv3Qi30SI_tciQqxA7PcQYfDs8 google-site-verification=dDuljHA8qYpNOjccmeFO2Lz0yzmQIy61E1zRioTNiD4 google-site-verification=AwCGr-gwjTBRGJCQe1RMrOskL35SCnXD7nTgRLOoi3o _1pz47wz9mfanwtolhihbi5vkvpsstqc google-site-verification=hC-6QAiwN_yMi4W3VdKF7tt48l6pVXyjXpfVZB5H274 v=MCPv1; k=ed25519; p=0OMhuh6D4YvceAMLuTqrtiRWip6S71lk09JGk2kpCoo=

RegistrationMarkMonitor Inc.

registrar	MarkMonitor Inc.
registered	1995-05-24
expires	2028-05-23
last changed	2024-12-18
owner	DNStination Inc.
nameservers	isla.ns.cloudflare.com randy.ns.cloudflare.com
status	client delete prohibited client transfer prohibited client update prohibited

registered 1995-05-24expires 2028-05-23

HTTPS certificate49 days left

valid	yes
issuer	Google Trust Services
covers	claude.com, content-cdn.claude.com, *.content-cdn.claude.com
protocol	TLSv1.3

issued 2026-09-22expires 2026-12-21

DNSSECinsecure

Domain is not signed with DNSSEC

. → com → claude.com

Email authenticationpoor

SPF	none
DMARC	pass policy reject
DKIM	none of 1 common selectors

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade C · 135/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

15/45missing: CAA Records, SPF Record, DKIM Presence

Advanced Security

15/25missing: Mail Server Configuration

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop160.79.104.10Barracuda160.79.104.10UCEPROTECT Level 1160.79.104.10

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

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.

curl "https://how.is/v1/domain/trust?domain=claude.com" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=claude.com"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on claude.com. Reference: /llms.txt.

IPv6. Does claude.com work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch claude.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