Autonomous system
AS11584 NYCHHC - New York City Health & Hospitals Corporation
Unclassified ARIN
Summary
NYC Health + Hospitals
government enterprise legacy
NYCHHC is the New York City Health & Hospitals Corporation — NYC Health + Hospitals, the public benefit corporation that runs New York City's municipal hospital system, its clinics and its correctional-health services.
What it's used for
RIS reports 15 announced IPv4 prefixes and 8,192 addresses, no IPv6, and 2 observed neighbours. The prefix list is two /20s — 67.221.16.0/20 and 64.251.32.0/20 — plus the /21 and /24 deaggregates carved out of them. Announcing the covering aggregate and its components is ordinary traffic-engineering practice for a multi-homed enterprise; it is not evidence of a sprawling inventory.
Every prefix RDAP resolved registers to New York City Health & Hospitals Corporation itself, under NYCHHC and NYCHHC-SIG. There is not a single third-party registrant, which rules out the leased-address shape and confirms this is space the organisation holds directly rather than provider-assigned blocks.
The two-neighbour count is the role signal. A network holding 8,000-odd addresses that peered with hundreds of ASes would be a carrier; peering with two means it buys transit and serves exactly one organisation. What that space carries is hospital IT — clinical systems, administrative networks and remote access across the city's public facilities.
Notable
NYC Health + Hospitals is a city-chartered public corporation, not a private hospital group, so this is a government network in the substantive sense even though the name reads like a healthcare brand. No PTRs returned on the addresses sampled; that is a sample, and nothing is inferred from it.
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 2026-11-11, 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 · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11584- Registry name
- NYCHHC
- Registrant
- New York City Health & Hospitals Corporation
- Abuse contact
- khalid.rucker@nychhc.org
- Registered
- 2008-03-11
- Last changed
- 2018-05-09
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 15 with no ROA
- ROAs
- 0 authorising AS11584
- ASPA
- no ASPA record
- IRR
- 73% registered · 11 of 15 announcements 4 other origin
- Route objects
- 3 naming AS11584
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 1,846 prefixes, as published 2026-11-11. 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