Autonomous system detail  ·  US flag US

AS34

Announced

Operated by University of Delaware, US flag US.

Summary

// analyst note
Confirmed US/ARIN (not European). Actively routed university edge AS; low risk, RPKI-signed. Allocated 1984-10-03 (ARIN RDAP). Cross-links to AS2 (UDEL-DCN).
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-09; clean academic network with RPKI deployed.
IPv4 prefixes
2
~65.8K addresses
IPv6 prefixes
1
announced
Peer networks
5
4 up · 1 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High  ·  3 sources  ·  How this page is checked

AS34 is a legacy single-digit-era allocation registered under ARIN to the University of Delaware — confirmed US/ARIN, not European as the low number might suggest — and it remains a live campus network. It originates 128.175.0.0/16 (the "UDELNET" block, which also appears in the RFC 1166 network table) and 2604:580::/32, both RPKI-valid — about two IPv4 prefixes and one IPv6 prefix (~65,792 addresses) — with seven IPv4 peers and four IPv6 peers. Upstreams and peers include Cogent (AS174), Comcast (AS33287, AS33659), and NYSERNet (AS3754, AS3630), and it peers with AS2 (UDEL-DCN, also University of Delaware and one of the very oldest ASNs). The ARIN ASN RegDate is 1984-10-03 (ARIN RDAP). For triage this is an actively-routed university edge AS — low-risk and RPKI-signed. No notable public abuse signal was found as of June 2026.

Operator
University of Delaware (ARIN; also holds AS2) [Confirmed] — ARIN RDAP / bgp.he.net
Country / RIR
US, ARIN [Confirmed] (not European)
Allocated
1984-10-03 [Confirmed] — ARIN RDAP (rdap.arin.net/registry/autnum/34)
Org status
active — udel.edu

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-09; clean academic network with RPKI deployed — bgp.he.net

Network & routing

Network type
research / education (university) [Confirmed]
Size
2 IPv4 prefixes, 1 IPv6 (~65,792 addrs); originates 128.175.0.0/16, 2604:580::/32 (both RPKI-valid) — bgp.he.net (2026-06)
Routing/peering
actively announcing; 7 IPv4 peers / 4 IPv6 peers; upstreams/peers incl. AS174 (Cogent), AS33287 & AS33659 (Comcast), AS3754 & AS3630 (NYSERNet); peers with AS2 (also U Delaware); RPKI valid on main prefixes — bgp.he.net
Notable usage
University of Delaware campus routing; originates 128.175.0.0/16 (UDELNET; also in RFC 1166 network table) — udel.edu
Related ASNs
AS2 (UDEL-DCN, University of Delaware — one of the very oldest ASNs) [Confirmed]
Analyst note
Confirmed US/ARIN (not European). Actively routed university edge AS; low risk, RPKI-signed. Allocated 1984-10-03 (ARIN RDAP). Cross-links to AS2.
[ 02 ] — Announced prefixes

What this network routes.

3 prefixes total · as observed by RouteViews at 2026-09-20 · one collector view, not a global census
// IPv4 prefixes2
  1. 128.175.0.0/16/16
  2. 38.115.62.0/24/24
// IPv6 prefixes1
  1. 2604:580::/32/32
[ 03 ] — Notable peers & upstreams

Who it talks to.

5 observed neighbours
// Notable connections5 of 5 observed

Neighbours observed by RouteViews at 2026-09-20, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.

ASNOperatorRole
AS174 Cogent Communications, LLC upstream
AS3754 — upstream
AS33287 — upstream
AS33659 — upstream
AS2 University of Delaware downstream
Neighbours observed via public BGP collectors; not a complete peering list.