AS26231 San Francisco International Airport

SFIA-ASN - San Francisco International Airport · registered in the United States

IPv4 addresses4,0965 prefixes · <0.001% of announced IPv4

Rank in United States#4,707largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#15,856of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS26231 in ASN lookup Look up an IP in this network (216.9.96.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

216.9.96.0/22
216.9.100.0/24
216.9.101.0/24
216.9.102.0/23
216.9.104.0/21

Similar-sized networks in United States

ASNNameIPv4 addresses

AS26052#4704 ABN-AMRO-CLEARING-USA-LLC - Fortis Clearing Chicago LLC4,096

AS26165#4705 CHSCC - Chattanooga State Community College4,096

AS26178#4706 ATKINS-NORTH-AMERICA - AtkinsRealis4,096

AS26247#4708 HCCA - Hamilton-Clermont Cooperative Assn.4,096

AS26327#4709 HIGHLANDS-CABLE - Highlands Cable Group4,096

AS26481#4710 REBEL-HOSTING - Rebel Hosting4,096

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