AS394251 Cystic Fibrosis Foundation

CFF - Cystic Fibrosis Foundation · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#16,664largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#77,475of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS394251 in ASN lookup Look up an IP in this network (198.162.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

198.162.0.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS394246#16661 VALOR-COMMUNICATION-INC-INDUSTRY - VALOR COMMUNICATION, INC.256

AS394248#16662 S1-SUWANEE-DC - SiteOne Landscape Supply256

AS394250#16663 PDS-DC1 - Pacific Dental Services256

AS394252#16665 CC-ASN - Clear Creek ISD256

AS394253#16666 1ST-TECH - XPRESSBET INC.256

AS394254#16667 BLUESOFTWARE - BLUE SOFTWARE, LLC256

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