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AS27274Central Michigan University

United StatesRegistryARIN

As of 23rd October 2026, AS27274 (Central Michigan University), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 139k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 1,761st-largest of the 79,652 networks we see originating IPv4, and the 512th-largest of 18,475 in the United States. It is seen behind 1 upstream network, most often AS237 (Merit Network Inc.). 50% 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

3

IPv6 prefixes

1

IPv4 addresses

139k

IPv6 /64s

4.3B

Upstream graph

The networks AS27274 is seen behind, one and two hops out, drawn from real AS paths.

AS27274Toward the internet core
Upstream graph for AS27274: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27274Central Michigan …This networkAS237Merit Network Inc.AS1299Arelion (fka. Tel…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS27274 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 AS27274
NetworkCountryRelationshipPathsVantage pts
AS237Merit Network Inc.USPeer294140

Prefixes

The largest blocks AS27274 originates, widest first.

Largest prefixes originated by AS27274
PrefixAddressesVisibility
35.32.0.0/1665.5k77/77
141.209.0.0/1665.5k77/77
35.33.64.0/198.2k77/77
2607:ff30::/324.3B × /6463/64

Routing health

How AS27274'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

  • Valid50.0%2
  • Invalid0.0%0
  • No ROA50.0%2

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS27274 started or stopped in this period.

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