AS23494 — HSC - Blue Cross Blue Shield of Illinois or Blue Cross Blue Shield of Texas

AS23494 announces 4 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

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 BCBSILLINOIS and HCSCNET10 and the reverse DNS record mastserv-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.

Announced prefixes

• 205.172.133.0/24
• 205.172.134.0/24
• 208.79.24.0/24
• 208.79.26.0/24

Upstream networks

• AS7018 AT&T Enterprises, LLC
• AS33491 Comcast Cable Communications, LLC

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS33491 Comcast Cable Communications, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 4 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 75% of announcements registered; 4 route objects.
• Listed in as-sets: AS-COMCAST-EDIA, AS-GBLX, AS-PROLE.