AS25609 — DMC

AS25609 announces 30 IPv4 prefixes covering 52,224 addresses and 0 IPv6 prefixes.

About this network

The AS handle DMC is held by Detroit Medical Center.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by the netname THM36Z-NETWORK1 and registrant Tenet HealthSystem Medical, Inc. across all sampled prefixes.
• The AS announces 52224 IPv4 addresses across 30 prefixes while maintaining only 2 observed neighbours, a ratio that indicates an internal corporate estate with site-by-site segmentation rather than an access or transit network.

Notable

• The RDAP registrants for the largest prefixes are consistently Tenet HealthSystem Medical, Inc., which differs from the AS holder name Detroit Medical Center.
• Tenet HealthSystem acquired Detroit Medical Center, explaining the discrepancy between the AS holder and the RDAP registrants.
• The inventory consists entirely of IPv4 prefixes within the 155.139.0.0/16 range, with no IPv6 prefixes announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 155.139.1.0/24
• 155.139.3.0/24
• 155.139.4.0/24
• 155.139.7.0/24
• 155.139.8.0/24
• 155.139.16.0/21
• 155.139.30.0/24
• 155.139.32.0/22
• 155.139.37.0/24
• 155.139.40.0/24
• 155.139.42.0/23
• 155.139.44.0/22
• 155.139.48.0/20
• 155.139.64.0/20
• 155.139.80.0/21
• 155.139.88.0/22
• 155.139.94.0/23
• 155.139.96.0/21
• 155.139.112.0/23
• 155.139.114.0/24
• 155.139.118.0/23
• 155.139.136.0/21
• 155.139.144.0/20
• 155.139.160.0/19
• 155.139.192.0/21
• 155.139.200.0/22
• 155.139.204.0/24
• 155.139.206.0/23
• 155.139.208.0/20
• 155.139.224.0/19

Upstream networks

• AS237 Merit Network Inc.
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS237 Merit Network Inc.
• AS7018 AT&T Enterprises, LLC