asn.dev

Autonomous system

AS14255 AS-USD

Unclassified ARIN

IPv4 addresses 1.54K 14 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 10 see address space

Summary

University of San Diego

United States · AI-generated

education research infrastructure

A single /24 announced as eight separate pieces, alongside a /31 and a /123.

What it's used for

  • A university's network. 1,538 addresses across fourteen IPv4 prefixes, with two observed BGP neighbours.

Notable

  • 192.195.154.0 is split into announcements at /25, /26, /27, /28, /29, /30 and two at /31, each carrying the netname USD.
  • 137.164.41.104/31 is registered to CENIC under the netname CALREN.
  • The IPv6 announcement is a /123, covering thirty-two addresses.
  • Two of eighteen sampled addresses answered, as mymobilelb.sandiego.edu and banprodxe.sandiego.edu.

Interesting

  • Splitting one block into eight is the most extreme deaggregation in this range, and the sizes step down by half each time in the pattern a tool produces when told to cover a range exactly. Most networks filter announcements smaller than a /24, so almost none of this reaches the wider internet.
  • The /31 is a point-to-point link to the regional research network, and the /123 is a similarly tiny slice of IPv6. Neither is meant to travel; both are visible because the collector that built this inventory sees more than a distant router would.
  • One published name marks a production instance of the university's administrative system. Naming a student records host in public DNS tells an outsider what to aim at.
  • Two neighbours for a university means transit arrives through the research network rather than from commercial carriers.

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

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

ASNetworkPaths seen
AS2152CENIC331
AS22773Cox Communications Inc.51

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 14 prefixes · 1.54K addresses IPv6 1 prefixes

CountryNamePrefixes
USUnited States of America15

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS14255
Registry name
AS-USD
Registrant
University of San Diego
Abuse contact
abuse@sandiego.edu
Registered
2006-08-28
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 6 with no ROA
ROAs
0 authorising AS14255
ASPA
no ASPA record
IRR
100% registered · 6 of 6 announcements
Route objects
8 naming AS14255

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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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