AS394547 San Francisco Bay Area Rapid Transit District

BART-OCIO - San Francisco Bay Area Rapid Transit District · registered in the United States

IPv4 addresses16,38423 prefixes · <0.001% of announced IPv4

Rank in United States#2,392largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#7,114of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS394547 in ASN lookup Look up an IP in this network (148.165.64.1) All networks in United States

IPv4 prefixes

All 23 prefixes, in address order.

148.165.64.0/23
148.165.66.0/23
148.165.68.0/22
148.165.72.0/21
148.165.80.0/23
148.165.82.0/23
148.165.84.0/22
148.165.88.0/21
148.165.96.0/22
148.165.100.0/24
148.165.101.0/24
148.165.102.0/23
148.165.104.0/22
148.165.108.0/24
148.165.109.0/24
148.165.110.0/23
148.165.112.0/21
148.165.120.0/24
148.165.121.0/24
148.165.122.0/23
148.165.124.0/24
148.165.125.0/24
148.165.126.0/23

Similar-sized networks in United States

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AS396484#2393 CITY-OF-ROSEVILLE-CA - City of Roseville16,384

AS397879#2394 LUMINATE-01 - Luminate Fiber LLC16,384

AS399356#2395 KOSCIUSKO-CONNECT-01 - Kosciusko Connect LLC16,384

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