Autonomous system
AS20442 YNHHSC - Yale-New Haven Health Services Corporation
Unclassified ARIN
Summary
Yale-New Haven Health Services Corporation
healthcare business enterprise
The AS handle YNHHSC is operated by Yale-New Haven Health Services Corporation.
What it's used for
- The address space carries internal hospital and health system infrastructure, evidenced by netnames such as
YNHHSC1,YNHH6-COM,YNHH,YNHH3, andYNHH4-COM, and a reverse DNS record pointing toymgbilling.ynhhs.org. - The AS announces 7680 IPv4 addresses across 10 prefixes with only 2 observed neighbours, a ratio indicative of a small, self-contained enterprise network rather than a transit or access provider.
Notable
- Registrants are mixed: several prefixes are registered to AT&T Enterprises, LLC (netname
SBCIS-SIS80-1005), while others are registered directly to Yale-New Haven Health Services Corporation or Yale New Haven Hospital. - The address inventory is fragmented, consisting of multiple /21, /22, /23, and /24 blocks from different historical allocations, including space originally associated with SBC/AT&T.
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 2026-11-08, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 7.68K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 10 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS20442- Registry name
- YNHHSC
- Registrant
- Yale-New Haven Health Services Corporation
- Abuse contact
- LIST_Network@ynhh.org
- Registered
- 2007-09-10
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 30 with no ROA
- ROAs
- 0 authorising AS20442
- ASPA
- no ASPA record
- IRR
- 100% registered · 30 of 30 announcements
- Route objects
- 37 naming AS20442
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: 455 networks and 1,854 prefixes, as published 2026-11-09. 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