ASN Lookup Tool

Flagstar Bank flagstar.com US US 4 Routes

AS Data

AS23291

AS23291 – Flagstar Bank

AS Number 23291
AS Name FLAGSTAR-BANK-US
Organization Flagstar Bank(flagst-6)
Country US
Website flagstar.com
Number of IPv4 Routes 4
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2002-02-21

ASN Intelligence API for production workflows

Use ASN data for AS23291 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
63.78.207.0/24 256
12.162.250.0/24 256
12.159.49.0/24 256
63.85.49.0/24 256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       23291
ASName:         FLAGSTAR-BANK-US
ASHandle:       AS23291
RegDate:        2002-02-21
Updated:        2012-02-24    
Ref:            https://rdap.arin.net/registry/autnum/23291


OrgName:        Flagstar Bank
OrgId:          FLAGST-6
Address:        5151 Corporate Drive
City:           Troy
StateProv:      MI
PostalCode:     48098
Country:        US
RegDate:        2002-02-21
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/FLAGST-6


OrgAbuseHandle: NETWO1296-ARIN
OrgAbuseName:   Network Services
OrgAbusePhone:  +1-248-312-2445 
OrgAbuseEmail:  networkservices@flagstar.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO1296-ARIN

OrgTechHandle: NETWO1296-ARIN
OrgTechName:   Network Services
OrgTechPhone:  +1-248-312-2445 
OrgTechEmail:  networkservices@flagstar.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO1296-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS13335 Cloudflare, Inc. US
AS7018 AT&T Enterprises, LLC US
AS701 Verizon Business/UUnet US
AS701 Verizon Business US

Upstreams

AS Number Description Country
AS13335 Cloudflare, Inc. US
AS7018 AT&T Enterprises, LLC US
AS701 Verizon Business US

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Frequently Asked Questions

ASN AS23291 is an Autonomous System Number used to identify a network for BGP internet routing.
AS23291 is listed under Flagstar Bank.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.