How privacy works

Private lookups are not added to public searches, stored reports or change history. This does not remove a report that was already public. Your choice lasts for this browser session.

Who hosts anthropic.com?

Answer

www.anthropic.com uses the Anthropic, PBC network; the hosting company is unconfirmed.

Likely🇺🇸 United StatesIPv6HTTP/3

Checked 1 hour ago from Cloudflare ZRH in 220 ms. This is a saved result.

Your next steps

What needs attention

Prioritized observations from this check. Review changes with whoever manages the website.

  1. Improve

    Review browser security headers

    Strict-Transport-Security, Content-Security-Policy, Referrer-Policy, Permissions-Policy did not meet the conservative header checks. This is not a complete security audit.

    Next step: Review these headers with the site developer and test policy changes before enforcing them.

  2. Good to know

    Only the network operator is identified

    The visible IP network is known, but no hosting-specific evidence confirms the company or reseller serving the site.

    Next step: Use the evidence as a network attribution and verify the hosting provider with the website owner if needed.

Evidence by layer

The company operating a network and the company selling the hosting can be different.

Network operators

ANTHROPIC - Anthropic, PBC, US

Network ownership alone does not confirm the retail hosting provider.

How we know

  • 160.79.104.10 belongs to AS399358 (ANTHROPIC - Anthropic, PBC, US)
  • 2607:6bc0::10 belongs to AS399358 (ANTHROPIC - Anthropic, PBC, US)

Servers

The addresses the name points to and the networks that own them.

www.anthropic.com (where the site redirects)

  • 160.79.104.10Anthropic, PBCNetwork AS399358 (ANTHROPIC - Anthropic, PBC, US)🇺🇸 Registered in United States, block 160.79.104.0/23
  • 2607:6bc0::10Anthropic, PBCNetwork AS399358 (ANTHROPIC - Anthropic, PBC, US)🇺🇸 Registered in United States, block 2607:6bc0::/48

anthropic.com (the address you entered)

  • 160.79.104.10Anthropic, PBCNetwork AS399358 (ANTHROPIC - Anthropic, PBC, US)🇺🇸 Registered in United States, block 160.79.104.0/23
  • 2607:6bc0::10Anthropic, PBCNetwork AS399358 (ANTHROPIC - Anthropic, PBC, US)🇺🇸 Registered in United States, block 2607:6bc0::/48

Reachable over IPv6.

Website

What the site answered when we visited its home page.

Status
200 OK
Address
https://www.anthropic.com/
Page title
Home \ Anthropic
HTTPS
Yes
HTTP/3
Supported
Response time
171 ms from Cloudflare ZRH

Redirects (1)

  1. 301https://anthropic.com/
  2. 200https://www.anthropic.com/

Security headers

D
  • Strict-Transport-Security (too weak)
  • Content-Security-Policy (too weak)
  • Clickjacking protection
  • X-Content-Type-Options
  • Referrer-Policy
  • Permissions-Policy

Built with

FrameworkNext.js

DNS

Who answers for the domain name, and its records.

DNS provider
Cloudflare
Name servers
isla.ns.cloudflare.com
randy.ns.cloudflare.com
Zone
anthropic.com
DNSSEC
Not signed
Certificates
issue amazon.com
issue amazonaws.com
issue amazontrust.com
issue awstrust.com
issue comodoca.com
issue digicert.com; cansignhttpexchanges=yes
issue letsencrypt.org
issue pki.goog; cansignhttpexchanges=yes
issue sectigo.com
issue ssl.com
issuewild amazon.com
issuewild amazonaws.com
issuewild amazontrust.com
issuewild awstrust.com
issuewild comodoca.com
issuewild digicert.com; cansignhttpexchanges=yes
issuewild letsencrypt.org
issuewild pki.goog; cansignhttpexchanges=yes
issuewild sectigo.com
issuewild ssl.com
All DNS records (58)
TypeNameValueTTL
Aanthropic.com160.79.104.10300
AAAAanthropic.com2607:6bc0::10300
NSanthropic.comisla.ns.cloudflare.com85376
NSanthropic.comrandy.ns.cloudflare.com85376
MXanthropic.com1 aspmx.l.google.com1800
MXanthropic.com10 alt3.aspmx.l.google.com1800
MXanthropic.com10 alt4.aspmx.l.google.com1800
MXanthropic.com5 alt1.aspmx.l.google.com1800
MXanthropic.com5 alt2.aspmx.l.google.com1800
TXTanthropic.com1password-site-verification=TO6XSBV6G5CTTA3Z3KKW2BS44M60
TXTanthropic.com5fnm79lyb330pg223w4zouc1qqd6ke260
TXTanthropic.com6c43f0e4-7a6e-41f1-b393-a467b815c9ab60
TXTanthropic.comMS=ms4019208160
TXTanthropic.comMS=ms8681601460
TXTanthropic.comW6bXmYleKF5pLbpxzw6VcHcQTIyYh2M60
TXTanthropic.comasv=0f0dc2f902c508ffccf27f9408c2348360
TXTanthropic.comatlassian-domain-verification=I9Xbb3XhdwM5exlpz4aYPu3j6WwEaPCBQwANPQYdbYWWnqiwB9ULpjyw/bKJtKRf60
TXTanthropic.comatlassian-sending-domain-verification=80547484-e42a-4b89-bf3c-d8ffd4c3ebab60
TXTanthropic.comca3-f11ea7ccbb494dba9a917fa7a141e28160
TXTanthropic.comcursor-domain-verification-crx2da=6b38eKFnztmRYqLTALmFfsXSO60
TXTanthropic.comelevenlabs=gYHFc9PeL2d2VTBdDhfMyRlxwOup_wM5bPLhmo2zux060
TXTanthropic.comgoogle-site-verification=KkmsJvGLnpKf_BQwhAx5mnK2OmoQPzrxES2P_0dD5rA60
TXTanthropic.comgoogle-site-verification=YYRII7lPleimo7caNN0AKZHuihr3BGBskjT44gBolec60
TXTanthropic.comgoogle-site-verification=_NED9Pp6OpundSy6MNEyuIbF-8mqgRoE2iGQDqH4wKo60
TXTanthropic.comgoogle-site-verification=hcpp8MUuEqp_24yZzaMvQheLydlnxVWZ4Bbsv3rJocc60
TXTanthropic.comgoogle-site-verification=lZ-Chr9wqR_c_yVXYrxvZjm7r4Dg44mLMda6GvQSaPA60
TXTanthropic.comgoogle-site-verification=yIJD2JqRVo-AOCE_9rySL9RZFZDM9a_GatXkDuHGqmY60
TXTanthropic.comh1-domain-verification=ZEejAhpyT5wfKiZRsXi87LTQKM2QBySRC61439biYN9Jnq6660
TXTanthropic.comjetbrains-domain-verification=53i175ssi0qal446eoubiiun160
TXTanthropic.commongodb-site-verification=j1N3BwHxhEMDCEr5og46Cub3MmoNzq9x60
TXTanthropic.compaloaltonetworks-site-verification=ff19a5245abd982338280d302303afe5429d84bcecff2cdbb3c4961e8a794caf60
TXTanthropic.comparallel-domain-verification-1nq0xf=gmPYOOzn9XVn1qxa0KlVXIENX60
TXTanthropic.comsegment-site-verification=bh66TwguDMclltZFX2wYU8sv2xwL0jYt60
TXTanthropic.comslack-domain-verification=j7g4p0r5GSLrk9O1CswTYqsKJRFURuy5qGKvmAbU60
TXTanthropic.comstripe-verification=421fc24e5cd4975f8577d411a2c34072be068dab6321e75505da641dadd31f8460
TXTanthropic.comstripe-verification=b4a23f9e5d7d2b9b0c10967235226410439ba826a420b7425970bf11dc1e1c5d60
TXTanthropic.comv=spf1 include:_spf.google.com ~all60
TXTanthropic.comwiz-domain-verification=06c4dd0706e50380f788c7acab07945e658246992e140f41657f86fb6c53c5e960
CAAanthropic.com0 issue "amazon.com"300
CAAanthropic.com0 issue "amazonaws.com"300
CAAanthropic.com0 issue "amazontrust.com"300
CAAanthropic.com0 issue "awstrust.com"300
CAAanthropic.com0 issue "comodoca.com"300
CAAanthropic.com0 issue "digicert.com; cansignhttpexchanges=yes"300
CAAanthropic.com0 issue "letsencrypt.org"300
CAAanthropic.com0 issue "pki.goog; cansignhttpexchanges=yes"300
CAAanthropic.com0 issue "sectigo.com"300
CAAanthropic.com0 issue "ssl.com"300
CAAanthropic.com0 issuewild "amazon.com"300
CAAanthropic.com0 issuewild "amazonaws.com"300
CAAanthropic.com0 issuewild "amazontrust.com"300
CAAanthropic.com0 issuewild "awstrust.com"300
CAAanthropic.com0 issuewild "comodoca.com"300
CAAanthropic.com0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAAanthropic.com0 issuewild "letsencrypt.org"300
CAAanthropic.com0 issuewild "pki.goog; cansignhttpexchanges=yes"300
CAAanthropic.com0 issuewild "sectigo.com"300
CAAanthropic.com0 issuewild "ssl.com"300

Email

Well protected against spoofing: SPF plus an enforced DMARC policy.

Mailbox provider
Google Workspace
Mail servers
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
Allowed senders
Google Workspace
SPF
Mail from other servers is marked as suspicious.
DMARC
Spoofed mail is rejected.
MTA-STS
Not enabled
SPF and DMARC records

v=spf1 include:_spf.google.com ~all

v=DMARC1; p=reject; sp=reject; rua=mailto:f0cef134490d4d43b9c134fc3c2a3481@dmarc-reports.cloudflare.net,mailto:dmarc-reports@anthropic.com; ruf=mailto:dmarc-reports@anthropic.com; fo=1

Domain registration

Registrar
MarkMonitor Inc.
Registered
2 Oct 2001 (25 years ago)
Paid until
2 Oct 2033 (in 2533 days)
Last changed
9 Oct 2023
Status
Deletion lock (registrar)Transfer lock (registrar)Update lock (registrar)
DNSSEC at registry
No
Source
rdap.verisign.com

Connected services

Verification records in DNS show the domain is linked to these accounts.

Microsoft 365AtlassianGoogle Search ConsoleStripe

Observed changes

A compact record of what changed between public checks. Rechecks happen only when someone requests them.

History starts with saved public observations. No earlier changes are inferred.

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