ASN AS18588 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS18588?

AS18588 is listed under Postmedia Network Inc.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS18588 Postmedia Network Inc

ASN Lookup Tool

Postmedia Network Inc postmedia.com

CA 2 Routes

AS Data

AS18588

AS18588 – Postmedia Network Inc

AS Number	18588
AS Name	POSTM
Organization	Postmedia Network Inc (postm2)
Country	CA
Website	postmedia.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2005-05-26

ASN Intelligence API for production workflows

Use ASN data for AS18588 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.187.153.0/24	AS18588	Postmedia Network Inc	Postmedia Network Inc	256
204.187.152.0/24	AS18588	Postmedia Network Inc	Postmedia Network Inc	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       18588
ASName:         POSTM
ASHandle:       AS18588
RegDate:        2005-05-26
Updated:        2012-02-24
Ref:            https://rdap.arin.net/registry/autnum/18588


OrgName:        Postmedia Network Inc
OrgId:          POSTM2
Address:        6th Floor - 300 Carlton Street
City:           Winnipeg
StateProv:      MB
PostalCode:     R3B 2K6
Country:        CA
RegDate:        2010-08-26
Updated:        2023-11-30
Ref:            https://rdap.arin.net/registry/entity/POSTM2

ReferralServer:  rwhois://rwhois.postmedia.com:4321

OrgDNSHandle: NETWO10001-ARIN
OrgDNSName:   Network Admin
OrgDNSPhone:  +1-416-802-4302 
OrgDNSEmail:  jsithiravelu@postmedia.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/NETWO10001-ARIN

OrgAbuseHandle: SMITH278-ARIN
OrgAbuseName:   SMITH, DOUG 
OrgAbusePhone:  +1-416-903-0313 
OrgAbuseEmail:  dosmith@postmedia.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SMITH278-ARIN

OrgNOCHandle: SMITH278-ARIN
OrgNOCName:   SMITH, DOUG 
OrgNOCPhone:  +1-416-903-0313 
OrgNOCEmail:  dosmith@postmedia.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/SMITH278-ARIN

OrgRoutingHandle: NETWO10001-ARIN
OrgRoutingName:   Network Admin
OrgRoutingPhone:  +1-416-802-4302 
OrgRoutingEmail:  jsithiravelu@postmedia.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NETWO10001-ARIN

OrgTechHandle: NETWO10001-ARIN
OrgTechName:   Network Admin
OrgTechPhone:  +1-416-802-4302 
OrgTechEmail:  jsithiravelu@postmedia.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO10001-ARIN

OrgTechHandle: SMITH278-ARIN
OrgTechName:   SMITH, DOUG 
OrgTechPhone:  +1-416-903-0313 
OrgTechEmail:  dosmith@postmedia.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SMITH278-ARIN

OrgNOCHandle: NETWO10001-ARIN
OrgNOCName:   Network Admin
OrgNOCPhone:  +1-416-802-4302 
OrgNOCEmail:  jsithiravelu@postmedia.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO10001-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "18588",
    "as_handle" : "AS18588",
    "as_name" : "POSTM",
    "admin_contacts" : [ "NETWO10001-ARIN" ],
    "tech_contacts" : [ "NETWO10001-ARIN", "NETWO10001-ARIN", "SMITH278-ARIN" ],
    "abuse_contacts" : [ "SMITH278-ARIN" ],
    "date_created" : "2005-05-26",
    "date_updated" : "2012-02-24",
    "source" : "https://rdap.arin.net/registry/autnum/18588"
  } ],
  "organization" : {
    "handle" : "POSTM2",
    "name" : "Postmedia Network Inc",
    "address" : [ "6th Floor - 300 Carlton Street", "Winnipeg", "MB", "R3B2K6", "CA" ],
    "street" : "Carlton Street",
    "city" : "Winnipeg",
    "state" : "MB",
    "zip_code" : "R3B2K6",
    "country" : [ "CA" ],
    "date_created" : "2010-08-26",
    "date_updated" : "2023-11-30",
    "source" : "https://rdap.arin.net/registry/entity/POSTM2",
    "addressCountry" : "CA"
  },
  "administrative_contacts" : [ {
    "handle" : "NETWO10001-ARIN",
    "name" : "Network Admin",
    "email" : [ "jsithiravelu@postmedia.com" ],
    "phone" : [ "+1-416-802-4302" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO10001-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "NETWO10001-ARIN",
    "name" : "Network Admin",
    "email" : [ "jsithiravelu@postmedia.com" ],
    "phone" : [ "+1-416-802-4302" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO10001-ARIN"
  }, {
    "handle" : "SMITH278-ARIN",
    "name" : "SMITH, DOUG",
    "email" : [ "dosmith@postmedia.com" ],
    "phone" : [ "+1-416-903-0313" ],
    "source" : "https://rdap.arin.net/registry/entity/SMITH278-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "SMITH278-ARIN",
    "name" : "SMITH, DOUG",
    "email" : [ "dosmith@postmedia.com" ],
    "phone" : [ "+1-416-903-0313" ],
    "source" : "https://rdap.arin.net/registry/entity/SMITH278-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS19122	eStruxture Data Centers Inc.	CA

Upstreams

AS Number	Description	Country
AS19122	eStruxture Data Centers Inc.	CA