AS21984 Fairfax County Public Schools

FCPS - Fairfax County Public Schools · registered in the United States

IPv4 addresses65,5368 prefixes · 0.002% of announced IPv4

Rank in United States#1,190largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,237of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21984 in ASN lookup Look up an IP in this network (151.188.0.1) All networks in United States

IPv4 prefixes

All 8 prefixes, in address order.

151.188.0.0/18
151.188.64.0/21
151.188.72.0/22
151.188.76.0/23
151.188.78.0/23
151.188.80.0/20
151.188.96.0/19
151.188.128.0/17

Similar-sized networks in United States

ASNNameIPv4 addresses

AS21783#1187 SILVERNET - State of Nevada65,536

AS21798#1188 INTERNATIONALDELIVERS - International Truck and Engine Corp65,536

AS21897#1189 VIRTUA-HEALTH - Virtua Health65,536

AS22174#1191 NET-SUC-TECH-ALF - State University of New York College of Technology at Alfred65,536

AS22178#1192 PA-SENATE - Senate of Pennsylvania65,536

AS22217#1193 CALVIN-UNIVERSITY - Calvin College65,536

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