Autonomous system
AS11756 CHLA - Children's Hospital Los Angeles
Unclassified ARIN
Summary
Children's Hospital Los Angeles
enterprise legacy
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.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-04, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11756- Registry name
- CHLA
- Registrant
- Children's Hospital Los Angeles
- Abuse contact
- IS-NetworkTeam@chla.usc.edu
- Registered
- 2014-10-31
- Last changed
- 2014-10-31
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS11756
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 6 naming AS11756
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 453 networks and 1,853 prefixes, as published 2026-11-05. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere