asn.dev

Autonomous system

AS13371 DUKE-INTERCHANGE

Unclassified ARIN

IPv4 addresses 152K 5 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Duke University

United States · AI-generated

education research enterprise

A hundred and fifty thousand addresses, one neighbour, and nothing in reverse DNS.

What it's used for

  • A United States university network. 151,808 addresses across five IPv4 prefixes, one observed BGP neighbour, and two IPv6 prefixes.

Notable

  • Two legacy /16s, 152.3.0.0/16 and 152.16.0.0/16, are netnames DUKE-NET and DUKE-NET3.
  • 67.159.64.0/18 is DUKE-NET2, so the numbering does not follow the block sizes.
  • 152.22.224.0/20 is netname NCREN-DUKE-PARALLEL-IPV4-1, naming a state research network.
  • Registrant contacts include an IT security office alongside the usual hostmaster role.
  • Fifteen addresses were queried for reverse DNS and none returned a name.

Interesting

  • The word PARALLEL in a netname is space set aside for a second path into the same institution. Research networks run traffic that must not share a queue with a campus browsing the web, so the university keeps a separate allocation for the research side and announces it through the state network.
  • A security office listed as a registry contact is unusual. Most records name a hostmaster and stop. Putting the abuse and incident side in the public record is a decision to be reachable when something on a hundred and fifty thousand addresses misbehaves.
  • One neighbour for a network this size is a campus that reaches the world entirely through its regional research network, which is how higher education has been connected since before commercial transit existed.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS81MCNC373

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 5 prefixes · 152K addresses IPv6 2 prefixes

CountryNamePrefixes
USUnited States of America7

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS13371
Registry name
DUKE-INTERCHANGE
Registrant
Duke University
Abuse contact
datacom-hostmaster@duke.edu
Registered
2006-10-03
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
57% valid · 4 valid, 3 with no ROA
ROAs
4 authorising AS13371
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
19 naming AS13371

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,772 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check