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AS177University of Michigan

United StatesRegistryARIN

As of 23rd October 2026, AS177 (University of Michigan), a network registered in the United States with ARIN, originates 2 IPv6 prefixes. It is seen behind 1 upstream network, most often AS237 (Merit Network Inc.). 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

0

IPv6 prefixes

2

IPv4 addresses

0

IPv6 /64s

131k

Upstream graph

The networks AS177 is seen behind, one and two hops out, drawn from real AS paths.

AS177Toward the internet core
Upstream graph for AS177: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS177University of Mic…This networkAS237Merit Network Inc.AS1299Arelion (fka. Tel…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS177 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 AS177
NetworkCountryRelationshipPathsVantage pts
AS237Merit Network Inc.USPeer12663

Prefixes

The largest blocks AS177 originates, widest first.

Largest prefixes originated by AS177
PrefixAddressesVisibility
2001:48a8:68fd::/4865.5k × /6463/64
2607:f018:fffe::/4865.5k × /6463/64

Routing health

How AS177'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS177 started or stopped in this period.

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