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AS23261NCS Managed Services Inc

CanadaRegistryARIN

As of 12th November 2026, AS23261 (NCS Managed Services Inc), a network registered in Canada with ARIN, originates 8 IPv4 prefixes covering 7.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 13,118th-largest of the 80,772 networks we see originating IPv4, and the 353rd-largest of 1,607 in Canada. It is seen behind 2 upstream networks, most often AS11260 (EastLink) and AS5645 (TekSavvy Solutions, Inc.). 89% of its announcements have 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

8

IPv6 prefixes

1

IPv4 addresses

7.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS23261 is seen behind, one and two hops out, drawn from real AS paths.

AS23261Toward the internet core
Upstream graph for AS23261: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS23261NCS Managed Servi…This networkAS5645TekSavvy Solution…AS11260EastLinkAS3257GTT Communication…AS6461Zayo BandwidthAS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS23261 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS23261
NetworkCountryRelationshipPathsVantage pts
AS11260EastLinkCAPeer610142
AS5645TekSavvy Solutions, Inc.CAPeer7878

Prefixes

The largest blocks AS23261 originates, widest first.

Largest prefixes originated by AS23261
PrefixAddressesVisibility
149.18.192.0/204.1k78/78
66.235.100.0/221k78/78
156.9.4.0/221k78/78
23.131.112.0/2425678/78
136.175.116.0/2425678/78
136.175.117.0/2425678/78
136.175.118.0/2425678/78
136.175.119.0/2425678/78
2605:2e40::/324.3B × /6464/64

Routing health

How AS23261'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

  • Valid88.9%8
  • Invalid0.0%0
  • No ROA11.1%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 13th Oct 2026.

  • Announced2605:2e40::/3227th Oct 2026
  • Withdrawn2605:2e40::/3227th Oct 2026
  • Announced156.9.4.0/2223rd Oct 2026
  • Withdrawn156.9.4.0/2223rd Oct 2026

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