Data as of Nov 4, 2026

12.231.98.0/24

No anonymizer space · no proxy exits in 30 days

Blue Cross Blue Shield of Michigan Mutual Insurance · space held by AT&T Enterprises, LLC

Announcement

this exact prefix

No RPKI

Announced by

Type

Business

Risk

0 / 100 · Low

Announcements

Less specific

Prefix	Origin	Type	Leased from	Proxy exits	Holder	RPKI
12.128.0.0/9	AS7018	Residential	IP broker Rackdog (part)	5,173 283 always on	AT&T Enterprises, LLC
12.0.0.0/8	AS7018	Residential		13,297 724 always on	AT&T Enterprises, LLC

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
12.0.0.0/8	16,777,216	ATT	AT&T Enterprises, LLC (AEL-360) · US	Direct Allocation	Aug 23, 1983	abuse@att.net
└ 12.231.98.0/24	256	BCBS-OF-56-98	BCBS of MI (BCBSO-7) · US	Reassigned	Dec 17, 2010	—

IPv4 market

Origin network

Name: Blue Cross Blue Shield of Michigan Mutual Insurance
Type: Business
Registered: Nov 6, 2017
Domain: bcbsm.com
Industry: Human Rights and Social Advocacy (Human Rights, Environment and Wildlife Conservation, Other)
Spamhaus ASN-DROP: not listed