HOW.IS
?

How is anthropic.com?

Looks fine risk 0/100

Registered 25 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 128 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

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

How anthropic.com looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
128 ms · ends at www.anthropic.com
HTTPS
40 d
left on a Let's Encrypt certificate
Age
25 years
registered 2001-10-02
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records6 record types
A160.79.104.10
AAAA2607:6bc0::10
MX5 alt1.aspmx.l.google.com
10 alt4.aspmx.l.google.com
1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
5 alt2.aspmx.l.google.com
NSisla.ns.cloudflare.com
randy.ns.cloudflare.com
TXTMS=ms86816014
google-site-verification=_NED9Pp6OpundSy6MNEyuIbF-8mqgRoE2iGQDqH4wKo
mongodb-site-verification=j1N3BwHxhEMDCEr5og46Cub3MmoNzq9x
asv=0f0dc2f902c508ffccf27f9408c23483
google-site-verification=hcpp8MUuEqp_24yZzaMvQheLydlnxVWZ4Bbsv3rJocc
elevenlabs=gYHFc9PeL2d2VTBdDhfMyRlxwOup_wM5bPLhmo2zux0
atlassian-domain-verification=I9Xbb3XhdwM5exlpz4aYPu3j6WwEaPCBQwANPQYdbYWWnqiwB9ULpjyw/bKJtKRf
google-site-verification=lZ-Chr9wqR_c_yVXYrxvZjm7r4Dg44mLMda6GvQSaPA
ca3-f11ea7ccbb494dba9a917fa7a141e281
segment-site-verification=bh66TwguDMclltZFX2wYU8sv2xwL0jYt
cursor-domain-verification-crx2da=6b38eKFnztmRYqLTALmFfsXSO
W6bXmYleKF5pLbpxzw6VcHcQTIyYh2M
google-site-verification=KkmsJvGLnpKf_BQwhAx5mnK2OmoQPzrxES2P_0dD5rA
1password-site-verification=TO6XSBV6G5CTTA3Z3KKW2BS44M
google-site-verification=yIJD2JqRVo-AOCE_9rySL9RZFZDM9a_GatXkDuHGqmY
parallel-domain-verification-1nq0xf=gmPYOOzn9XVn1qxa0KlVXIENX
v=spf1 include:_spf.google.com ~all
5fnm79lyb330pg223w4zouc1qqd6ke2
h1-domain-verification=ZEejAhpyT5wfKiZRsXi87LTQKM2QBySRC61439biYN9Jnq66
atlassian-sending-domain-verification=80547484-e42a-4b89-bf3c-d8ffd4c3ebab
wiz-domain-verification=06c4dd0706e50380f788c7acab07945e658246992e140f41657f86fb6c53c5e9
6c43f0e4-7a6e-41f1-b393-a467b815c9ab
jetbrains-domain-verification=53i175ssi0qal446eoubiiun1
stripe-verification=b4a23f9e5d7d2b9b0c10967235226410439ba826a420b7425970bf11dc1e1c5d
google-site-verification=YYRII7lPleimo7caNN0AKZHuihr3BGBskjT44gBolec
slack-domain-verification=j7g4p0r5GSLrk9O1CswTYqsKJRFURuy5qGKvmAbU
stripe-verification=421fc24e5cd4975f8577d411a2c34072be068dab6321e75505da641dadd31f84
paloaltonetworks-site-verification=ff19a5245abd982338280d302303afe5429d84bcecff2cdbb3c4961e8a794caf
MS=ms40192081
CAA{'type': 'CAA', 'issue': 'digicert.com; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'pki.goog; cansignhttpexchanges=yes'}
{'type': 'CAA', 'issue': 'sectigo.com', 'critical': 0}
{'type': 'CAA', 'issue': 'amazonaws.com', 'critical': 0}
{'type': 'CAA', 'issue': 'amazon.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'awstrust.com'}
{'type': 'CAA', 'issue': 'ssl.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'amazonaws.com'}
{'type': 'CAA', 'issue': 'amazontrust.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'sectigo.com'}
{'type': 'CAA', 'issue': 'comodoca.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'amazontrust.com'}
{'type': 'CAA', 'critical': 0, 'issuewild': 'comodoca.com'}
{'type': 'CAA', 'issue': 'awstrust.com', 'critical': 0}
{'type': 'CAA', 'issue': 'pki.goog; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'letsencrypt.org'}
{'type': 'CAA', 'critical': 0, 'issuewild': 'amazon.com'}
{'type': 'CAA', 'issue': 'letsencrypt.org', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'ssl.com'}
{'type': 'CAA', 'critical': 0, 'issuewild': 'digicert.com; cansignhttpexchanges=yes'}
RegistrationMarkMonitor Inc.
registrarMarkMonitor Inc.
registered2001-10-02
expires2033-10-02
last changed2023-10-09
ownerREDACTED FOR PRIVACY
nameserversisla.ns.cloudflare.com
randy.ns.cloudflare.com
statusclient delete prohibited
client transfer prohibited
client update prohibited
registered 2001-10-02expires 2033-10-02
HTTPS certificate40 days left
validyes
issuerLet's Encrypt
coversanthropic.com
protocolTLSv1.3
issued 2026-09-05expires 2026-12-04
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → anthropic.com
Email authenticationexcellent
SPFpass v=spf1 include:_spf.google.com ~all
DMARCpass policy reject
DKIMfound: google

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

Security scoregrade B · 160/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
30/45missing: DMARC Record, DKIM Presence
Advanced Security
25/25
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=anthropic.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=anthropic.com"

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

Watch anthropic.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