AS5661 UNIVERSITY OF SOUTH FLORIDA

USF - UNIVERSITY OF SOUTH FLORIDA · registered in the United States

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in United States#999largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,869of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS5661 in ASN lookup Look up an IP in this network (131.247.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

131.247.0.0/16

IPv6 prefixes

All 1 prefix.

2607:fe50::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

AS393601#996 SMOA-STATEOFMISSOURI-01 - State of Missouri Office of Administration65,536

AS17234#997 GAC - Gustavus Adolphus College65,536

AS92#998 CLARKSON-AS - Clarkson University65,536

AS10755#1000 DARTMOUTH-AS - Dartmouth College65,536

AS13326#1001 TUFTS-UNIVERSITY - Tufts University65,536

AS14235#1002 STATE-NM-US - State of New Mexico65,536

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