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AS159Ohio State University

United StatesRegistryARIN

As of 22nd October 2026, AS159 (Ohio State University), a network registered in the United States with ARIN, originates 7 IPv4 prefixes covering 198k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 1,352nd-largest of the 79,663 networks we see originating IPv4, and the 381st-largest of 18,476 in the United States. It is seen behind 2 upstream networks, most often AS600 (OARnet) and AS3112 (OARnet). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

7

IPv6 prefixes

1

IPv4 addresses

198k

IPv6 /64s

65.5k

Upstream graph

The networks AS159 is seen behind, one and two hops out, drawn from real AS paths.

AS159Toward the internet core
Upstream graph for AS159: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS159Ohio State Univer…This networkAS600OARnetAS3112OARnetAS3356Lumen (Level 3)AS6939Hurricane Electri…AS11537Internet2

Networks observed one and two hops upstream of AS159 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 AS159
NetworkCountryRelationshipPathsVantage pts
AS600OARnetUSPeer596140
AS3112OARnetUSPeer62

Prefixes

The largest blocks AS159 originates, widest first.

Largest prefixes originated by AS159
PrefixAddressesVisibility
128.146.0.0/1665.5k77/77
140.254.0.0/1665.5k77/77
164.107.0.0/1665.5k77/77
198.30.200.0/221k77/77
192.12.205.0/2425677/77
192.68.143.0/2425677/77
192.153.26.0/2425677/77
2620:0:1a10::/4865.5k × /6463/64

Routing health

How AS159'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%8

Propagation

  • Globally propagated90% of full-feed peers or more100.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS159 started or stopped in this period.

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