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AS26101 Yahoo Holdings Inc.

YAHOO-BF1 - Yahoo Holdings Inc. · registered in the United States

IPv4 addresses121,34472 prefixes · 0.004% of announced IPv4
Rank in United States#575largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#1,700of 79,396 networks with IPv4
IPv613 x /484 prefixes
CountryUnited States18,679 ASNs registered there
Open AS26101 in ASN lookup Look up an IP in this network (63.250.196.1) All networks in United States

IPv4 prefixes

All 72 prefixes, in address order.

  • 63.250.196.0/22
  • 63.250.200.0/22
  • 66.196.80.0/21
  • 66.196.88.0/23
  • 66.196.104.0/22
  • 66.196.108.0/23
  • 66.196.110.0/23
  • 66.196.112.0/21
  • 66.218.80.0/20
  • 67.195.176.0/20
  • 67.195.192.0/20
  • 67.195.208.0/21
  • 67.195.216.0/22
  • 67.195.220.0/23
  • 67.195.222.0/23
  • 68.142.216.0/21
  • 68.142.224.0/20
  • 69.147.72.0/21
  • 69.147.112.0/20
  • 72.30.0.0/20
  • 72.30.16.0/22
  • 72.30.20.0/23
  • 72.30.22.0/24
  • 72.30.23.0/24
  • 72.30.24.0/21
  • 72.30.32.0/22
  • 72.30.36.0/22
  • 72.30.40.0/21
  • 72.30.48.0/20
  • 72.30.192.0/21
  • 72.30.200.0/22
  • 72.30.204.0/23
  • 72.30.206.0/23
  • 74.6.48.0/22
  • 74.6.96.0/21
  • 74.6.104.0/23
  • 74.6.106.0/24
  • 74.6.107.0/24
  • 74.6.108.0/22
  • 74.6.112.0/20
  • 74.6.128.0/20
  • 74.6.144.0/21
  • 74.6.248.0/21
  • 98.137.192.0/21
  • 98.139.8.0/22
  • 98.139.16.0/23
  • 98.139.18.0/23
  • 98.139.20.0/23
  • 98.139.22.0/23
  • 98.139.24.0/21
  • 98.139.32.0/21
  • 98.139.40.0/22
  • 98.139.44.0/23
  • 98.139.46.0/23
  • 98.139.124.0/22
  • 98.139.128.0/22
  • 98.139.132.0/23
  • 98.139.134.0/23
  • 98.139.136.0/21
  • 98.139.144.0/21
  • 98.139.152.0/22
  • 98.139.156.0/22
  • 98.139.160.0/19
  • 98.139.192.0/21
  • 98.139.200.0/21
  • 98.139.208.0/20
  • 98.139.224.0/23
  • 98.139.226.0/23
  • 98.139.228.0/22
  • 98.139.232.0/21
  • 98.139.240.0/20
  • 209.73.180.0/22

IPv6 prefixes

All 4 prefixes.

  • 2001:4998:58::/46
  • 2001:4998:124::/46
  • 2001:4998:194::/46
  • 2001:4998:ef99::/48

Other ASNs named Yahoo Holdings Inc.

18 other networks use the same organisation name; together with AS26101 they announce 493,568 IPv4 addresses.

ASNNameIPv4 addresses
AS36647YAHOO-GQ1 - Yahoo Holdings Inc. US184,320
AS36646YAHOO-NE1 - Yahoo Holdings Inc. US94,720
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
AS16904#572 ARVIG-16904 - Arvig Enterprises Inc.123,136
AS2495#573 KANREN - Kansas Research and Education Network123,136
AS12025#574 IMDC-AS12025 - Iron Mountain Data Center122,368
AS11398#576 CENTURYLINK-LEGACY-EMBARQ-LVGS - CenturyLink Communications, LLC121,088
AS116#577 TELCORDIA - Ericsson Inc.120,576
AS1493#578 DNIC-ASBLK-01492-01493 - Headquarters, USAISC119,808

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