Report for 399358

Name

ANTHROPIC - Anthropic, PBC, US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

399358 ANTHROPIC - Anthropic, PBC, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US
    AS6461          ZAYO-6461 - Zayo Bandwidth, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
47634 AS399358       ORIGIN  Originate:        768 /22.42  Transit:          0 /0.00  ANTHROPIC - Anthropic, PBC, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
76381 AS399358      ANTHROPIC - Anthropic, PBC, US                     2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  160.79.104.0/23      4777 13335 399358      
  209.249.57.0/24      4777 2497 6461 399358   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS399358   2 More Specifics   2 Total Advertisements   ANTHROPIC - Anthropic, PBC, US
    160.79.104.0/23               160.79.104.0/21
    209.249.57.0/24               209.249.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS399358 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS399358\n             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #
             
             
             ASNumber:       399358
             ASName:         ANTHROPIC
             ASHandle:       AS399358
             RegDate:        2023-09-20
             Updated:        2024-01-08
             Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
             Ref:            https://rdap.arin.net/registry/autnum/399358
             
             
             OrgName:        Anthropic, PBC
             OrgId:          AP-2440
             Address:        548 Market St.
             Address:        PMB 90375
             City:           San Francisco
             StateProv:      CA
             PostalCode:     94104-5401
             Country:        US
             RegDate:        2023-07-31
             Updated:        2023-08-22
             Ref:            https://rdap.arin.net/registry/entity/AP-2440
             
             
             OrgDNSHandle: ANTHR5-ARIN
             OrgDNSName:   Anthropic
             OrgDNSPhone:  +1-415-236-0599 
             OrgDNSEmail:  arin@anthropic.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/ANTHR5-ARIN
             
             OrgAbuseHandle: ANTHR5-ARIN
             OrgAbuseName:   Anthropic
             OrgAbusePhone:  +1-415-236-0599 
             OrgAbuseEmail:  arin@anthropic.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ANTHR5-ARIN
             
             OrgRoutingHandle: ANTHR5-ARIN
             OrgRoutingName:   Anthropic
             OrgRoutingPhone:  +1-415-236-0599 
             OrgRoutingEmail:  arin@anthropic.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ANTHR5-ARIN
             
             OrgTechHandle: ANTHR5-ARIN
             OrgTechName:   Anthropic
             OrgTechPhone:  +1-415-236-0599 
             OrgTechEmail:  arin@anthropic.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ANTHR5-ARIN
             
             OrgNOCHandle: ANTHR5-ARIN
             OrgNOCName:   Anthropic
             OrgNOCPhone:  +1-415-236-0599 
             OrgNOCEmail:  arin@anthropic.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/ANTHR5-ARIN
             
             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #