AS5766 Indian Health Service

IHS-MD-AS - Indian Health Service · registered in the United States

IPv4 addresses66,04813 prefixes · 0.002% of announced IPv4

Rank in United States#908largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,714of 79,396 networks with IPv4

IPv62 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS5766 in ASN lookup Look up an IP in this network (161.223.0.1) All networks in United States

IPv4 prefixes

All 13 prefixes, in address order.

161.223.0.0/17
161.223.128.0/19
161.223.160.0/20
161.223.176.0/21
161.223.184.0/23
161.223.189.0/24
161.223.190.0/23
161.223.192.0/18
198.45.0.0/24
198.45.3.0/24
198.45.6.0/24
198.45.9.0/24
198.45.10.0/24

IPv6 prefixes

All 1 prefix.

2607:f220:50a::/47

Similar-sized networks in United States

ASNNameIPv4 addresses

AS317#905 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)66,048

AS11279#906 GEORGE-MASON-UNIV - George Mason University66,048

AS589#907 UNT - University of North Texas66,048

AS20452#909 BSU - BALL STATE UNIVERSITY66,048

AS77#910 JHUAPL-AS - Johns Hopkins University Applied Physics Laboratory66,048

AS1559#911 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)66,048

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