asn.dev

Autonomous system

AS53257 ASN1

Unclassified ARIN

IPv4 addresses 61.44K 21 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

The Citadel

United States of America · AI-generated

business education us

ASN1 is operated by The Citadel.

What it's used for

  • The address space is registered under the netname CITADEL with registrant The Citadel across all sampled prefixes.
  • The AS announces 61,440 IPv4 addresses across 21 prefixes, with a single observed routing neighbour, indicating an isolated internal network rather than a transit or access provider.
  • The inventory consists entirely of IPv4 space within the 155.225.0.0/16 range, subdivided into 21 distinct prefixes.

Notable

  • All RDAP registrants for the largest prefixes list The Citadel as the registrant and CITADEL as the netname, consistent with the AS holder.
  • The address inventory is finely subdivided into 21 prefixes, suggesting site-by-site segmentation typical of an internal corporate or institutional estate.

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 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2711Spirit Communications1,276

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, 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 21 prefixes · 61.44K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America21

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS53257
Registry name
ASN1
Registrant
The Citadel
Abuse contact
domains@citadel.edu
Registered
2009-07-14
Last changed
2012-02-24
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 22 with no ROA
ROAs
0 authorising AS53257
ASPA
no ASPA record
IRR
0% registered · 0 of 22 announcements
Route objects
0 naming AS53257

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 1,779 prefixes, as published 2026-10-22. 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