AS11756 CHLA

CHLA is exactly what it looks like for once: Children's Hospital Los Angeles, the pediatric academic medical centre at 4650 Sunset Blvd in Los Angeles. It is a small enterprise AS carrying the hospital's own network, not a provider of any kind.

What it's used for

Enterprise multihoming for a single institution. RIS shows 4 IPv4 prefixes covering 1,024 addresses — two /23s (104.193.218.0/23 and 104.193.222.0/23) plus their /24 more-specifics, announced for traffic engineering — with no IPv6 and just 2 observed BGP neighbours. Both /23s are registered directly to Children's Hospital Los Angeles under org handle CHLA-1 at the hospital's own Sunset Blvd address, so every route the AS originates is space it holds itself. Two upstreams and a kilobyte of address space is the signature of an organisation buying resilient connectivity for its own site, with no transit, hosting, or subscriber role anywhere in the inventory.

Notable

The address space is the tell that this is a modern deployment rather than an early-internet network. 104.193.0.0/8-adjacent space was not handed out in the 1990s, and the registry agrees: ARIN created the CHLA-1 org record in March 2011 and assigned AS11756 to it in October 2014. Both dates are recent, which is what separates a genuine reissue from a legacy holder. Nothing about this network's four-digit AS number reflects its age.

Interesting

CHLA is a teaching and research hospital as well as a clinical one — its Saban Research Institute is affiliated with USC's Keck School of Medicine — but the routing gives no visibility into what the space carries. No PTRs were returned on the addresses sampled, which is a sample, not a finding; it is not grounds to infer anything about how the network is used internally.