AS4241 California State Franchise Tax Board

CSFTB - California State Franchise Tax Board · registered in the United States

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in United States#1,092largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,079of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS4241 in ASN lookup Look up an IP in this network (168.240.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

168.240.0.0/16

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ASNNameIPv4 addresses

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AS4246#1093 NJIT-AS - New Jersey Institute of Technology65,536

AS4604#1094 HOUSTON-ISD - Houston Independent School District65,536

AS5264#1095 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)65,536

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