subnet.im

AS54377YGHCS (York General Healthcare Services)

United StatesRegistryARIN

As of 13th November 2026, AS54377 (YGHCS (York General Healthcare Services)), a network registered in the United States with ARIN, originates 1 IPv4 prefix covering 256 addresses. By IPv4 address space that makes it the 60,024th-largest of the 80,825 networks we see originating IPv4, and the 13,100th-largest of 18,772 in the United States. It is seen behind 1 upstream network, most often AS15164 (Segra (Unite)). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1

IPv6 prefixes

0

IPv4 addresses

256

IPv6 /64s

0

Upstream graph

The networks AS54377 is seen behind, one and two hops out, drawn from real AS paths.

AS54377Toward the internet core
Upstream graph for AS54377: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS54377YGHCS (York Gener…This networkAS15164Segra (Unite)AS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS54377 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS54377
NetworkCountryRelationshipPathsVantage pts
AS15164Segra (Unite)USPeer7878

Prefixes

The largest blocks AS54377 originates, widest first.

Largest prefixes originated by AS54377
PrefixAddressesVisibility
174.34.227.0/2425678/78

Routing health

How AS54377's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 14th Oct 2026.

No announcement by AS54377 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.