% APNIC found the following authoritative answer from: whois.arin.net

#
# 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.
#

NetRange:       160.79.104.0 - 160.79.111.255
CIDR:           160.79.104.0/21
NetName:        AP-2440
NetHandle:      NET-160-79-104-0-1
Parent:         NET160 (NET-160-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Anthropic, PBC (AP-2440)
RegDate:        2023-09-14
Updated:        2025-01-23
Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/ip/160.79.104.0

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

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

OrgNOCHandle: ANTHR5-ARIN
OrgNOCName:   Anthropic
OrgNOCPhone:  +1-415-236-0599 
OrgNOCEmail:  arin@anthropic.com
OrgNOCRef:    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

OrgDNSHandle: ANTHR5-ARIN
OrgDNSName:   Anthropic
OrgDNSPhone:  +1-415-236-0599 
OrgDNSEmail:  arin@anthropic.com
OrgDNSRef:    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.
#