AS54063 — MHHS-AS - Memorial Hermann Health System

AS54063 announces 4 IPv4 prefixes covering 1,280 addresses and 0 IPv6 prefixes.

About this network

The AS handle MHHS-AS is held by Memorial Hermann Health System.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by netnames MHHS-1, MHHS-3, and MHHS-6 registered to Memorial Hermann Health System.
• The AS announces 1280 IPv4 addresses across 4 prefixes with 4 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.
• Traffic from this AS consists of internal hospital systems, administrative endpoints, and clinical infrastructure for a major healthcare provider operating 17 hospitals in southeast Texas.

Notable

• Three of the four announced prefixes are registered directly to Memorial Hermann Health System, while 198.22.24.0/23 is registered to Various Registries (Maintained by ARIN) with netname NET198.
• The address inventory is finely subdivided into small /24 and /23 blocks, consistent with site-by-site segmentation for a large multi-campus health system.

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

Announced prefixes

• 198.22.21.0/24
• 198.22.23.0/24
• 198.22.24.0/23
• 198.51.61.0/24

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC
• AS46887 Crown Castle Fiber LLC
• AS33662 Comcast Cable Communications, LLC

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC
• AS46887 Crown Castle Fiber LLC
• AS33662 Comcast Cable Communications, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 5 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS-COMCAST-EDIA.