AS23291 Flagstar Bank

FLAGSTAR-BANK-US - Flagstar Bank · registered in the United States

IPv4 addresses1,0244 prefixes · <0.001% of announced IPv4

Rank in United States#8,345largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#36,735of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS23291 in ASN lookup Look up an IP in this network (12.159.49.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

12.159.49.0/24
12.162.250.0/24
63.78.207.0/24
63.85.49.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS23275#8342 LM-USA - Lycamobile USA Inc1,024

AS23281#8343 CITY-OF-SACRAMENTO - City of Sacramento1,024

AS23290#8344 ELPASO-COUNTY-GOVERNMENT-COLORADO - El Paso County1,024

AS23296#8346 LINCARE-HOLDINGS-INC - LINCARE INC1,024

AS23351#8347 ANSYSNH - Ansys, Inc. - Lebanon NH1,024

AS23370#8348 NET-TY - TY INC1,024

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