asn.dev

Autonomous system

AS18521 AMERICAN-CAMPUS-COMMUNITIES - American Campus Communities, Inc

Unclassified ARIN

IPv4 addresses 256 1 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

American Campus Communities

United States of America · AI-generated

business corporate real-estate

AMERICAN-CAMPUS-COMMUNITIES is the autonomous system for American Campus Communities, Inc.

What it's used for

  • The address space is associated with the netname TWTC-NETBLK-1, indicating a specific network block within the corporate estate.
  • The AS announces 256 IPv4 addresses across 1 prefix with 1 observed neighbour, a ratio consistent with a small, isolated corporate or internal network rather than a transit or access provider.

Notable

  • The RDAP registrant for the announced prefix is Level 3 Parent, LLC, which differs from the AS holder American Campus Communities, Inc.
  • The address inventory consists of a single /24 block, 216.54.130.0/24, representing a compact and specific allocation.

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
AS11427Charter Communications Inc63

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS18521
Registry name
AMERICAN-CAMPUS-COMMUNITIES
Registrant
American Campus Communities, Inc
Abuse contact
mhall@studenthousing.com
Registered
2007-03-22
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS18521
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS18521

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: 449 networks and 1,846 prefixes, as published 2026-11-02. 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