AS11047 HHCC-ASN1

HHCC-ASN1 belongs to Hartford Hospital, the large teaching hospital in Hartford, Connecticut and the flagship of the Hartford HealthCare system. It is a hospital enterprise network: twelve /24s (about 3,000 addresses) out of 199.231.16.0/20, no IPv6, and three observed BGP neighbours.

What it's used for

This carries a healthcare provider's own operations — clinical systems, electronic health records, imaging, administration, staff and campus connectivity across the hospital and its affiliated sites. Nothing here is sold to anyone: the AS exists so the hospital can multi-home to a small number of upstream carriers and keep its address space provider-independent, which matters when clinical systems and inter-facility links cannot tolerate a renumbering event or a single carrier's outage.

Notable

All twelve announced prefixes are registered to HARTHOSP, the hospital's own ARIN network handle, and they are contiguous /24s carved from a single block. There is no third-party or leased space mixed in, and no hosting or transit shape to the announcement — three neighbours against 3,000 addresses is exactly what a self-multi-homing enterprise looks like.

Interesting

The whole network fits inside one /20, yet it is announced as twelve separate /24s rather than a single aggregate. Splitting a covering block like that is generally done to steer particular segments over particular upstreams, and it is a good reminder that prefix count says nothing about size — twelve prefixes here amount to less address space than a single /20 elsewhere in this range.