ANTHROPIC, PBC

Anthropic, PBC
Data as of 2026-08-16
GLEIF verified
LEI
984500B6DEB8CEBC4Z70
Registered name
ANTHROPIC, PBC
Jurisdiction
US-DE
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks7 · 68,864 IPv4 addresses
IPv6 2 prefixes (largest 2607:6bc0:11::/48)
Cluster ID222395749
RegistryBGP
Owner jurisdictionUS-DE
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 984500B6DEB8CEBC4Z70
Shared handles clustered on 9 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
7 +1 netblocks since 2026-07-05
2026-07-05 peak 7 2026-08-16

IP Ranges (7)

⬇ export CSV
CIDR Org name Registry Status Confidence
153.61.0.0/16 Anthropic, PBC ARIN DIRECT ALLOCATION ● high
160.79.104.0/21 Anthropic, PBC ARIN DIRECT ALLOCATION ● high
160.79.104.0/23 Anthropic, PBC BGP ANNOUNCED ● high
209.249.57.0/24 Anthropic, PBC BGP ANNOUNCED ● high
216.73.216.0/22 Anthropic, PBC ARIN ASSIGNMENT ● high
2607:6bc0::/48 Anthropic, PBC BGP ANNOUNCED ● high
2607:6bc0:11::/48 Anthropic, PBC BGP ANNOUNCED ● high

IPv6 ranges (2)

CIDR
2607:6bc0:11::/48
2607:6bc0::/48

Domains hosted in this network

what's this?
anthropic.com claude.ai claudeusercontent.com claude.com

Network trust

what's this?
RPKI hygiene: C how networks compare →
71.4% of checked blocks have valid RPKI ROA coverage (5 of 7)
Possible discrepancies (3)

These blocks are registered to Anthropic, PBC but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2607:6bc0::/48 /48 authorized for AS13335 — Cloudflare, Inc.
2607:6bc0:11::/48 /48 authorized for AS13335 — Cloudflare, Inc.
216.73.216.0/22 /22 authorized for AS16509 — Amazon.com, Inc.

NIC Handles

ANTHR5-ARIN ANTHR5-ARIN ANTHR5-ARIN ANTHR5-ARIN ANTHR5-ARIN ANTHR5-ARIN AP-2440 AS399358 AS60808