subnet.im

AS53999Priority Colo Inc

CanadaRegistryARIN

As of 10th November 2026, AS53999 (Priority Colo Inc), a network registered in Canada with ARIN, originates 2 IPv4 prefixes covering 4.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 16,899th-largest of the 80,733 networks we see originating IPv4, and the 451st-largest of 1,606 in Canada. It is seen behind 2 upstream networks, most often AS6461 (Zayo Bandwidth) and AS30176 (Priority Colo Inc), and in front of 3 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

2

IPv6 prefixes

1

IPv4 addresses

4.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS53999 is seen behind, one and two hops out, drawn from real AS paths.

AS53999Toward the internet core
Upstream graph for AS53999: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS53999Priority Colo IncThis networkAS6461Zayo BandwidthAS30176Priority Colo IncAS2914NTT America, Inc.AS32590Valve CorporationAS3356Lumen (Level 3)AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS53999 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

10

adjacent networks

Upstreams
220%
Peers
550%
Downstreams
330%

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

Upstreams of AS53999
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer766113
AS30176Priority Colo IncCAPeer18348

Prefixes

The largest blocks AS53999 originates, widest first.

Largest prefixes originated by AS53999
PrefixAddressesVisibility
173.237.208.0/204.1k76/76
173.237.221.0/2425676/76
2607:f699::/324.3B × /6463/63

Routing health

How AS53999'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

  • Valid100.0%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS53999 started or stopped in this period.

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