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AS34University of Delaware

United StatesRegistryARIN

As of 23rd October 2026, AS34 (University of Delaware), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 65.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 3,520th-largest of the 79,666 networks we see originating IPv4, and the 1,217th-largest of 18,482 in the United States. It is seen behind 5 upstream networks, most often AS33287 (Comcast Cable Communications, LLC) and AS174 (Cogent Communications, LLC), and in front of 1 downstream network. 67% of its announcements have 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

2

IPv6 prefixes

1

IPv4 addresses

65.8k

IPv6 /64s

4.3B

Upstream graph

The networks AS34 is seen behind, one and two hops out, drawn from real AS paths.

AS34Toward the internet core
Upstream graph for AS34: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS34University of Del…This networkAS174Cogent Communicat…AS3630NYSERNetAS3754NYSERNetAS33287Comcast Cable Com…AS33659Comcast Cable Com…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS49544i3D.net B.VAS293ESnetAS11537Internet2AS3356Lumen (Level 3)AS7922Comcast Cable Com…

Networks observed one and two hops upstream of AS34 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

13

adjacent networks

Upstreams
538%
Peers
754%
Downstreams
18%

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

Upstreams of AS34
NetworkCountryRelationshipPathsVantage pts
AS33287Comcast Cable Communications, LLCUSPeer169108
AS174Cogent Communications, LLCUSPeer7468
AS33659Comcast Cable Communications, LLCUSPeer4025
AS3754NYSERNetUSPeer62
AS3630NYSERNetUSPeer42

Prefixes

The largest blocks AS34 originates, widest first.

Largest prefixes originated by AS34
PrefixAddressesVisibility
128.175.0.0/1665.5k77/77
38.115.62.0/2425676/77
2604:580::/324.3B × /6463/64

Routing health

How AS34'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

  • Valid66.7%2
  • Invalid0.0%0
  • No ROA33.3%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS34 started or stopped in this period.

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