subnet.im

AS11537Internet2

United StatesRegistryARIN

As of 26th September 2026, AS11537 (Internet2), a network registered in the United States with ARIN, originates 24 IPv4 prefixes covering 11.5k addresses. By IPv4 address space that makes it the 9,774th-largest of the 79,480 networks we see originating IPv4, and the 3,021st-largest of 18,421 in the United States. It is seen behind 5 upstream networks, most often AS2153 (CENIC) and AS293 (ESnet), and in front of 113 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 0% of its routes reach at least 90% of full-feed peers, and 9 prefixes are also originated by another network.

At a glance

IPv4 prefixes

24

IPv6 prefixes

0

IPv4 addresses

11.5k

IPv6 /64s

0

Upstream graph

The networks AS11537 is seen behind, one and two hops out, drawn from real AS paths.

AS11537Toward the internet core
Upstream graph for AS11537: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS11537Internet2This networkAS293ESnetAS2153CENICAS2603NORDUnetAS20965GEANT VerenigingAS36944Ubuntunet Allianc…AS6453TATA Communicatio…AS6939Hurricane Electri…AS2152CENIC - CalRENAS1299Arelion (fka. Tel…AS3491PCCW Global (HK) …AS3257GTT Communication…AS6762Telecom Italia Sp…

Networks observed one and two hops upstream of AS11537 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

245

adjacent networks

Upstreams
52%
Peers
12752%
Downstreams
11346%

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

Upstreams of AS11537
NetworkCountryRelationshipPathsVantage pts
AS2153CENICUSPeer12,4021
AS293ESnetUSPeer2,0311
AS36944Ubuntunet Alliance For Research and Education NetworkingMWPeer373
AS20965GEANT VerenigingNLPeer11
AS2603NORDUnetDKPeer11

Prefixes

The largest blocks AS11537 originates, widest first.

Largest prefixes originated by AS11537
PrefixAddressesVisibility
64.57.16.0/204.1k2/81
163.253.0.0/221k2/81
163.253.12.0/235122/81
163.253.14.0/235122/81
163.253.66.0/235122/81
64.57.22.0/242562/81
162.252.70.0/242562/81
163.253.0.0/242562/81
163.253.3.0/242562/81
163.253.9.0/242562/81

Routing health

How AS11537'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%24
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%24

Prefix sizes

IPv4 — 24 prefixes

Recent changes

Announcements that started or stopped since 27th Aug 2026.

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