AS13611 U.S. Center For Disease Control and Prevention

CDC - U.S. Center For Disease Control and Prevention · registered in the United States

IPv4 addresses73,7282 prefixes · 0.002% of announced IPv4

Rank in United States#763largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,346of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS13611 in ASN lookup Look up an IP in this network (158.111.0.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

158.111.0.0/16
198.246.96.0/19

Similar-sized networks in United States

ASNNameIPv4 addresses

AS5080#760 ARAMCO-AS - Aramco73,984

AS11745#761 USNH - University System of New Hampshire73,728

AS15147#762 DHSINETNOC - DEPARTMENT OF HOMELAND SECURITY73,728

AS14954#764 FHCRC - The Fred Hutchinson Cancer Research Center73,728

AS22968#765 MIAMI-UNIVERSITY - Miami University73,728

AS62676#766 UMD-PUBLIC-AS - University of Michigan - Dearborn73,728

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