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AS22255Allegheny Health Network

United StatesRegistryARIN

As of 29th September 2026, AS22255 (Allegheny Health Network), a network registered in the United States with ARIN, originates 18 IPv4 prefixes covering 26.1k addresses. By IPv4 address space that makes it the 6,093rd-largest of the 79,607 networks we see originating IPv4, and the 2,049th-largest of 18,442 in the United States. It is seen behind 1 upstream network, most often AS21965 (Highmark Inc). 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

18

IPv6 prefixes

0

IPv4 addresses

26.1k

IPv6 /64s

0

Upstream graph

The networks AS22255 is seen behind, one and two hops out, drawn from real AS paths.

AS22255Toward the internet core
Upstream graph for AS22255: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS22255Allegheny Health …This networkAS21965Highmark IncAS3356Lumen (Level 3)AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS22255 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 AS22255
NetworkCountryRelationshipPathsVantage pts
AS21965Highmark IncUSPeer1,47682

Prefixes

The largest blocks AS22255 originates, widest first.

Largest prefixes originated by AS22255
PrefixAddressesVisibility
165.232.0.0/198.2k82/82
165.232.192.0/198.2k82/82
165.232.232.0/212k82/82
165.232.240.0/212k82/82
165.232.224.0/221k82/82
165.232.248.0/221k82/82
165.232.228.0/2351282/82
165.232.252.0/2351282/82
165.232.200.0/2425682/82
165.232.223.0/2425682/82

Routing health

How AS22255'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%18

Propagation

  • Globally propagated90% of full-feed peers or more100.0%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 18 prefixes

Recent changes

Announcements that started or stopped since 30th Aug 2026.

No announcement by AS22255 started or stopped in this period.

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