Autonomous system
AS23494 HSC - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas
Unclassified ARIN
Summary
Blue Cross Blue Shield of Illinois
business healthcare internal
The AS handle HSC is held by Blue Cross Blue Shield of Illinois.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by the netnames
BCBSILLINOISandHCSCNET10and the reverse DNS recordmastserv-v5.hcsctest.net. - The AS announces 1024 IPv4 addresses across 4 prefixes and maintains 2 observed neighbours, a ratio indicating a small, self-contained internal network rather than a transit or access provider.
Notable
- Registrants align with the announcer, listing "BlueCross BlueShield of Illinois" for the 205.172.133.0/24 and 205.172.134.0/24 blocks, and "Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas" for the 208.79.24.0/24 and 208.79.26.0/24 blocks.
- The inventory consists of four /24 blocks, all located in the United States, with no IPv6 prefixes announced.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS23494- Registry name
- HSC
- Registrant
- Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas
- Abuse contact
- michael_sanner@hcsc.net
- Registered
- 2002-03-27
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS23494
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 4 naming AS23494
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 454 networks and 1,852 prefixes, as published 2026-11-08. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere