subnet.im

AS237Merit Network Inc.

United StatesRegistryARINTypeEyeball

As of 23rd October 2026, AS237 (Merit Network Inc.), an access network registered in the United States with ARIN, originates 84 IPv4 prefixes covering 2.4M addresses and 9 IPv6 prefixes. By IPv4 address space that makes it the 234th-largest of the 79,659 networks we see originating IPv4, and the 59th-largest of 18,482 in the United States. It is seen behind 10 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 34 downstream networks. 63% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

84

IPv6 prefixes

9

IPv4 addresses

2.4M

IPv6 /64s

8.6B

Upstream graph

The networks AS237 is seen behind, one and two hops out, drawn from real AS paths.

AS237Toward the internet core
Upstream graph for AS237: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS237Merit Network Inc.This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS7018AT&T Enterprises,…AS151326DCConnect Communi…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS18106Viewqwest Pte LtdAS20130Depaul University

Networks observed one and two hops upstream of AS237 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

100

adjacent networks

Upstreams
1010%
Peers
5656%
Downstreams
3434%

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

Upstreams of AS237
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer7,16786
AS2914NTT America, Inc.USPeer3,83495
AS174Cogent Communications, LLCUSPeer2,32645
AS6939Hurricane Electric LLCUSPeer54113
AS7018AT&T Enterprises, LLCUSPeer36122
AS11537Internet2USPeer2422
AS293ESnetUSPeer2351
AS49544i3D.net B.VNLPeer2222
AS3303Swisscom (Schweiz) AGCHPeer2031
AS11164Internet2 I2PXUSPeer1354

Prefixes

All 93

The largest blocks AS237 originates, widest first.

Largest prefixes originated by AS237
PrefixAddressesVisibility
35.64.0.0/14262k77/77
198.108.0.0/14262k77/77
207.72.0.0/14262k77/77
35.68.0.0/15131k77/77
35.16.0.0/1665.5k77/77
35.25.0.0/1665.5k77/77
35.37.0.0/1665.5k77/77
35.38.0.0/1665.5k77/77
35.40.0.0/1665.5k77/77
35.58.0.0/1665.5k77/77

Routing health

How AS237'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

  • Valid63.4%59
  • Invalid1.1%1
  • No ROA35.5%33

Propagation

  • Globally propagated90% of full-feed peers or more97.8%91
  • Partially propagated40% to 90%1.1%1
  • Seen by few peersUnder 40%1.1%1

Prefix sizes

IPv4 — 84 prefixes

IPv6 — 9 prefixes

  • /324.3B × /6422.2%2
  • /4016.8M × /6422.2%2
  • /441M × /6411.1%1
  • /4865.5k × /6444.4%4

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS237 started or stopped in this period.

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