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AS26810 U.S. Dept. of Health and Human Services

HHSNET-NOC-ASN - U.S. Dept. of Health and Human Services · registered in the United States

IPv4 addresses284,41653 prefixes · 0.009% of announced IPv4
Rank in United States#244largest network in US by IPv4 space, of 18,338 · 0.02% of US
Rank worldwide#851of 79,396 networks with IPv4
IPv6256 x /32 (16,777,248 x /48)3 prefixes
CountryUnited States18,679 ASNs registered there
Open AS26810 in ASN lookup Look up an IP in this network (158.70.0.1) All networks in United States

IPv4 prefixes

All 53 prefixes, in address order.

  • 158.70.0.0/21
  • 158.70.16.0/23
  • 158.70.22.0/23
  • 158.70.30.0/23
  • 158.70.32.0/24
  • 158.70.44.0/22
  • 158.70.48.0/20
  • 158.70.64.0/19
  • 158.70.96.0/20
  • 158.70.112.0/24
  • 158.70.114.0/23
  • 158.70.116.0/22
  • 158.70.120.0/21
  • 158.70.140.0/22
  • 158.70.144.0/24
  • 158.70.145.0/24
  • 158.70.148.0/22
  • 158.70.152.0/21
  • 158.70.160.0/21
  • 158.70.168.0/22
  • 158.70.172.0/23
  • 158.70.175.0/24
  • 158.70.176.0/20
  • 158.70.192.0/18
  • 158.71.0.0/17
  • 158.71.192.0/19
  • 158.71.225.0/24
  • 158.72.0.0/17
  • 158.72.128.0/21
  • 158.72.136.0/22
  • 158.72.140.0/22
  • 158.72.144.0/20
  • 158.72.160.0/19
  • 158.72.192.0/18
  • 158.74.0.0/20
  • 158.74.16.0/21
  • 158.74.24.0/22
  • 158.74.28.0/23
  • 158.74.30.0/24
  • 158.74.31.0/24
  • 158.74.32.0/22
  • 158.74.36.0/23
  • 158.74.39.0/24
  • 158.74.40.0/21
  • 158.74.48.0/20
  • 158.74.64.0/18
  • 158.74.128.0/17
  • 162.99.0.0/17
  • 162.99.128.0/18
  • 162.99.192.0/19
  • 198.102.218.0/24
  • 198.179.0.0/23
  • 198.179.2.0/24

IPv6 prefixes

All 3 prefixes.

  • 2601:9600::/24
  • 2607:f220::/44
  • 2607:f220:600::/44

Similar-sized networks in United States

ASNNameIPv4 addresses
AS7127#241 SCE - Southern California Edison286,976
AS18186#242 NEBULA-GLOBAL - Nebula Global LLC285,696
AS8069#243 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation285,184
AS391#245 AFCONC-BLOCK1-AS - Air Force Systems Networking283,648
AS32098#246 TRANSTELCO-INC - Transtelco Inc281,344
AS22205#247 DATAPIPE-SEA - DataPipe, Inc.280,320

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