AS11584 NYCHHC

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.