AS11015 TCH-AS

TCH-AS is the autonomous system of Texas Children's Hospital, the large paediatric hospital and research institution in the Texas Medical Center, Houston. ARIN records the holder at 1102 Bates Avenue — the hospital's own campus address.

What it's used for

Hospital enterprise networking, nothing more exotic. RIS observes six announced IPv4 prefixes carrying 2,048 addresses in total, no IPv6, and four observed BGP neighbours. Every announcement sits inside 207.231.40.0/22 and 207.231.44.0/22, and both are registered in ARIN to TCH-TMC2 — the hospital's own Texas Medical Center allocation. Holder and registrant match exactly, so there is no third-party space riding on this number.

The routing behaviour is textbook multihomed enterprise: a couple of aggregates plus their /23 more-specifics, announced to a small set of upstreams for redundancy and traffic engineering. Four neighbours is a network that buys connectivity, not one that sells it. What lives behind it is the clinical and administrative estate — patient-facing systems, research computing, staff access, and whatever internet-facing services the hospital hosts itself.

Notable

Healthcare organisations of this size usually run BGP for one reason: an outage is a clinical incident, not an inconvenience. The redundant /23 more-specifics inside each /22 suggest exactly that posture — the hospital wants each half of its space individually steerable if a provider path fails.