subnet.im

AS63363Tucows.com Co.

CanadaRegistryARIN

As of 11th November 2026, AS63363 (Tucows.com Co.), a network registered in Canada with ARIN, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 49,320th-largest of the 80,747 networks we see originating IPv4, and the 950th-largest of 1,608 in Canada. It is seen behind 3 upstream networks, most often AS20473 (The Constant Company, LLC) and AS38345 (Internet Domain Name System Beijing…). 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

512

IPv6 /64s

65.5k

Upstream graph

The networks AS63363 is seen behind, one and two hops out, drawn from real AS paths.

AS63363Toward the internet core
Upstream graph for AS63363: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS63363Tucows.com Co.This networkAS20473The Constant Comp…AS32133Ting Fiber Inc.AS38345Internet Domain N…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6461Zayo BandwidthAS174Cogent Communicat…AS7497Computer Network …

Networks observed one and two hops upstream of AS63363 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS63363
NetworkCountryRelationshipPathsVantage pts
AS20473The Constant Company, LLCUSPeer127127
AS38345Internet Domain Name System Beijing Engineering Resrarch Center Ltd.CNPeer7676
AS32133Ting Fiber Inc.USPeer1111

Prefixes

The largest blocks AS63363 originates, widest first.

Largest prefixes originated by AS63363
PrefixAddressesVisibility
64.96.2.0/2425676/76
64.96.5.0/2425676/76
2620:57:4002::/4865.5k × /6462/63

Routing health

How AS63363'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

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS63363 started or stopped in this period.

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