Autonomous system
AS18588 POSTM
Hosting ARIN Content
Summary
Postmedia Network
media business canada
POSTM is the autonomous system for Postmedia Network Inc.
What it's used for
- The address space is registered under the netname
POSTMEDIA-NET1, indicating internal corporate infrastructure for the media company. - The AS announces a single IPv4 prefix,
204.187.152.0/23, totaling 512 addresses, with no IPv6 prefixes in inventory. - With only one observed neighbour in the routing system, the network operates as a small, isolated corporate estate rather than a transit or access provider.
Notable
- The RDAP registrant
Postmedia Network Incmatches the registry holder, confirming consistent ownership of the address space. - Postmedia Network is a Canadian media company, and the AS has been observed in routing tables since 2000.
- The inventory consists of a single contiguous block, reflecting a simple and stable address allocation for internal use.
CLASSIFICATION - after the card, on its own final line, emit exactly:
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
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Toronto Internet Exchange | Toronto, Canada | 206.108.34.191 |
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS19122 | eStruxture Data Centers Inc. | 112 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CA | Canada | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS18588- Registry name
- POSTM
- Registrant
- Postmedia Network Inc
- Abuse contact
- dosmith@postmedia.com
- Registered
- 2005-05-26
- Last changed
- 2012-02-24
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Postmedia Network
- Network type
- Content
- Scope
- North America
- Traffic ratio
- Mostly Outbound
- Peering policy
- Open
- IRR as-set
AS18588- Website
- http://www.postmedia.com
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
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS18588
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 11 naming AS18588
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 2026-10-21. 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