asn.dev

Autonomous system

AS22272 -Reserved AS-

Unclassified ARIN

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

Summary

Chicago Transit Authority

unknown · AI-generated

transit government municipal reserved

The AS handle is -Reserved AS- and the holder is Chicago Transit Authority.

What it's used for

  • The space carries the netname CHI-TRANSIT associated with the registrant Chicago Transit Authority.
  • The inventory consists of 2048 IPv4 addresses within a single prefix, 206.208.24.0/21, with 2 observed neighbours.

Notable

  • The RDAP registrant for the announced prefix is Chicago Transit Authority, which aligns with the operator identity.
  • The address inventory is a single /21 block with no IPv6 prefixes announced.

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
AS6325Illinois Century Network56
AS7018AT&T Enterprises, LLC2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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
Unknown1

Registry

Allocation record

ARIN · via Atlas (registry data)
Registry
ARIN
Allocation
reserved

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS22272
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
2 naming AS22272

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 1,784 prefixes, as published 2026-10-19. 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