AS36646 Yahoo Holdings Inc.

YAHOO-NE1 - Yahoo Holdings Inc. · registered in the United States

IPv4 addresses94,72051 prefixes · 0.003% of announced IPv4

Rank in United States#651largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,956of 79,396 networks with IPv4

IPv610 x /484 prefixes

CountryUnited States18,679 ASNs registered there

Open AS36646 in ASN lookup Look up an IP in this network (66.163.168.1) All networks in United States

IPv4 prefixes

All 51 prefixes, in address order.

66.163.168.0/21
66.163.176.0/20
72.30.240.0/23
72.30.242.0/23
74.6.228.0/22
98.136.96.0/23
98.136.98.0/23
98.136.104.0/22
98.136.120.0/21
98.137.80.0/21
98.137.154.0/23
98.137.156.0/22
98.137.216.0/21
98.138.0.0/20
98.138.16.0/23
98.138.18.0/23
98.138.20.0/22
98.138.24.0/21
98.138.32.0/20
98.138.48.0/23
98.138.50.0/23
98.138.52.0/22
98.138.56.0/21
98.138.64.0/19
98.138.96.0/24
98.138.97.0/24
98.138.98.0/23
98.138.100.0/22
98.138.104.0/21
98.138.112.0/20
98.138.128.0/18
98.138.192.0/20
98.138.208.0/24
98.138.209.0/24
98.138.210.0/23
98.138.212.0/22
98.138.216.0/22
98.138.220.0/22
98.138.224.0/19
98.139.108.0/22
216.155.192.0/23
216.155.194.0/24
216.155.195.0/24
216.155.196.0/22
216.155.200.0/21
216.252.104.0/21
216.252.112.0/22
216.252.116.0/23
216.252.118.0/24
216.252.119.0/24
216.252.120.0/21

IPv6 prefixes

All 4 prefixes.

2001:4998:44::/46
2001:4998:19c::/46
2001:4998:ef6c::/48
2001:4998:efeb::/48

Other ASNs named Yahoo Holdings Inc.

18 other networks use the same organisation name; together with AS36646 they announce 493,568 IPv4 addresses.

ASNNameIPv4 addresses

AS36647YAHOO-GQ1 - Yahoo Holdings Inc. US184,320

AS26101YAHOO-BF1 - Yahoo Holdings Inc. US121,344

AS10310YAHOO-1 - Yahoo Holdings Inc. US78,080

AS7280YAHOO-FC - Yahoo Holdings Inc. US2,304

AS14778YAHOO - Yahoo Holdings Inc. US1,536

AS10880YAHOO-AN2 - Yahoo Holdings Inc. US1,536

AS14777YAHOO - Yahoo Holdings Inc. US1,280

AS36088YAHOO-BCST-AC2 - Yahoo Holdings Inc. US1,280

AS5779YAHOO-DNB - Yahoo Holdings Inc. US768

AS14196YAHOO-CHA - Yahoo Holdings Inc. US768

AS14776YAHOO - Yahoo Holdings Inc. US768

AS14779YAHOO - Yahoo Holdings Inc. US768

AS14780YAHOO - Yahoo Holdings Inc. US768

AS36229YAHOO-YSM-SC8 - Yahoo Holdings Inc. US768

AS36752YAHOO-SP1 - Yahoo Holdings Inc. US768

AS393245YAHOO-SWB - Yahoo Holdings Inc. US768

AS4866POLYVORE - Yahoo Holdings Inc. US768

AS16515ALTAVISTA - Yahoo Holdings Inc. US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS27257#648 WEBAIR-INTERNET - Webair Internet Development Company Inc.95,488

AS33425#649 COREWEAVE - CoreWeave, Inc95,232

AS6315#650 XMISSION - XMission, L.C.94,720

AS2685#652 ATGS-MMD-AS - AT&T Enterprises, LLC94,464

AS400511#653 CWAVEFIBER - Clearwave Communications93,952

AS35994#654 AKAMAI-AS - Akamai Technologies, Inc.93,696

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources