AS20442 — YNHHSC - Yale-New Haven Health Services Corporation

AS20442 announces 10 IPv4 prefixes covering 7,680 addresses and 0 IPv6 prefixes.

About this network

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, and YNHH4-COM, and a reverse DNS record pointing to ymgbilling.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.

Announced prefixes

• 64.252.240.0/21
• 74.113.112.0/21
• 75.5.201.0/24
• 192.131.129.0/24
• 192.152.148.0/23
• 192.152.150.0/24
• 204.60.50.0/23
• 204.60.184.0/22
• 204.90.81.0/24
• 205.167.18.0/23

Upstream networks

• AS46887 Crown Castle Fiber LLC
• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS46887 Crown Castle Fiber LLC
• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 30 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 37 route objects.
• Listed in as-sets: AS-CCF, AS-CCF-TEST, AS16657:AS-CUST.