asn.dev

Autonomous system

AS27595 COLUM-600

Unclassified ARIN

IPv4 addresses 2.05K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Columbia College Chicago

United States of America · AI-generated

education business campus

COLUM-600 is operated by Columbia College Chicago.

What it's used for

  • The space carries the institutional network for the college, identified by the netname COLUM-70 and registrant Columbia College Chicago.
  • The AS announces 2048 IPv4 addresses across 1 prefix (199.168.232.0/21) with 2 observed neighbours, indicating a small, self-contained campus network rather than a transit or large-scale access provider.

Notable

  • The RDAP registrant Columbia College Chicago matches the registry holder and AS handle, confirming consistent ownership.
  • The address inventory consists of a single contiguous /21 block, typical for a dedicated institutional 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

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

ASNetworkPaths seen
AS25645Momentum Telecom, Inc.98
AS6079RCN20

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-24, 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 · 2.05K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS27595
Registry name
COLUM-600
Registrant
Columbia College Chicago
Abuse contact
robruiz@colum.edu
Registered
2011-03-09
Last changed
2014-05-14
Allocation
assigned

Declared

PeeringDB profile

self-reported
Name
Columbia College Chicago
Scope
Not Disclosed
Traffic ratio
Not Disclosed
Peering policy
Open
Website
http://colum.edu

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS27595
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
30 naming AS27595

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 2026-10-24. 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