subnet.im

AS2University of Delaware

United StatesRegistryARINTypeEyeball

As of 23rd October 2026, AS2 (University of Delaware), an access network registered in the United States with ARIN, originates 12 IPv4 prefixes covering 79.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,779th-largest of the 79,652 networks we see originating IPv4, and the 893rd-largest of 18,475 in the United States. It is seen behind 9 upstream networks, most often AS45609 (Bharti Airtel Ltd. AS for GPRS Service) and AS34 (University of Delaware). 8% of its announcements have a valid RPKI ROA; 4 are RPKI-invalid. 31% of its routes reach at least 90% of full-feed peers, and 6 prefixes are also originated by another network.

At a glance

IPv4 prefixes

12

IPv6 prefixes

1

IPv4 addresses

79.9k

IPv6 /64s

65.5k

Upstream graph

The networks AS2 is seen behind, one and two hops out, drawn from real AS paths.

AS2Toward the internet core
Upstream graph for AS2: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2University of Del…This networkAS34University of Del…AS41837"South telephone …AS45609Bharti Airtel Ltd…AS203794LLC Gals-TelecomAS270792Link NetAS174Cogent Communicat…AS33287Comcast Cable Com…AS12389Rostelecom PJSCAS9498Bharti Airtel Ltd.AS64313PT NAP Info Linta…AS3216Vimpelcom PJSCAS9049JSC "ER-Telecom H…

Networks observed one and two hops upstream of AS2 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

26

adjacent networks

Upstreams
935%
Peers
1765%
Downstreams
00%

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

Upstreams of AS2
NetworkCountryRelationshipPathsVantage pts
AS45609Bharti Airtel Ltd. AS for GPRS ServiceINPeer15477
AS34University of DelawareUSPeer7777
AS41837"South telephone company" LLCRUPeer7777
AS203794LLC Gals-TelecomRUPeer6834
AS270792Link NetBRPeer2323
AS52752Vegas Telecom Informática Ltda.BRPeer1111
AS327753SBM BANK (KENYA) LIMITEDKEPeer99
AS61763Poxley Provedor de Internet LtdaBRPeer31
AS199268LANCOM inzeniring racunalniskig sistemov d.o.o.SIPeer11

Prefixes

The largest blocks AS2 originates, widest first.

Largest prefixes originated by AS2
PrefixAddressesVisibility
128.4.0.0/1665.5k77/77
91.143.144.0/204.1k77/77
171.79.128.0/204.1k77/77
171.79.144.0/204.1k77/77
177.85.170.0/242561/77
177.85.171.0/242561/77
189.39.185.0/2425623/77
189.76.77.0/2425611/77
194.190.53.0/2425634/77
194.190.54.0/2425634/77

Routing health

How AS2'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

  • Valid7.7%1
  • Invalid30.8%4
  • No ROA61.5%8

Propagation

  • Globally propagated90% of full-feed peers or more30.8%4
  • Partially propagated40% to 90%15.4%2
  • Seen by few peersUnder 40%53.8%7

Prefix sizes

IPv4 — 12 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

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