ASN AS18220 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS18220?

AS18220 is listed under Australian Defence Organisation.

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.

AS18220 Australian Defence Organisation

ASN Lookup Tool

Australian Defence Organisation defence.gov.au

AU 7 Routes

AS Data

AS18220

AS18220 – Australian Defence Organisation

AS Number	18220
AS Name	AUS-DEFENCE-AS-AP
Organization	Australian Defence Organisation (org-ado1-ap)
Country	AU
Website	defence.gov.au
Number of IPv4 Routes	6
Number of IPv6 Routes	1
ASN type	GOVERNMENT
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS18220 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

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
203.6.104.0/22	AS18220	Australian Defence Organisation	Australian Defence Organisation	1024
202.12.69.0/24	AS18220	Australian Defence Organisation	Australian Defence Organisation	256
203.6.114.0/24	AS18220	Australian Defence Organisation	Australian Defence Organisation	256
203.6.96.0/22	AS18220	Australian Defence Organisation	Australian Defence Organisation	1024
2401:6bfd::/32	AS18220	Australian Defence Organisation	Australian Defence Organisation	~79×10²⁷
203.6.100.0/22	AS18220	Australian Defence Organisation	Australian Defence Organisation	1024
203.10.114.0/24	AS18220	Australian Defence Organisation	Australian Defence Organisation	256

Raw Whois Response

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS17653 - AS18431'

as-block:       AS17653 - AS18431
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2019-01-08T23:19:07Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS18220'

% Abuse contact for 'AS18220' is 'architecture.support@defence.gov.au'

aut-num:        AS18220
as-name:        AUS-DEFENCE-AS-AP
descr:          Australian Defence Organisation
descr:          DCBN
country:        AU
org:            ORG-ADO1-AP
admin-c:        FMGR1-AP
tech-c:         DHM2-AP
abuse-c:        AA2247-AP
notify:         hostmaster@defence.gov.au
mnt-lower:      MAINT-AU-DEFENCE
mnt-routes:     MAINT-AU-DEFENCE
mnt-by:         APNIC-HM
mnt-irt:        IRT-AUS-DEFENCE-AU
last-modified:  2021-01-15T01:28:23Z
source:         APNIC

irt:            IRT-AUS-DEFENCE-AU
address:        Department of Defence
address:        Bonshaw Rd, HMAS Harman
address:        Cannberra, ACT 2600
address:        Australia
e-mail:         architecture.support@defence.gov.au
abuse-mailbox:  architecture.support@defence.gov.au
admin-c:        RJ190-AP
tech-c:         RJ190-AP
auth:           # Filtered
remarks:        architecture.support@defence.gov.au is invalid
mnt-by:         MAINT-AU-DEF-MGMTCONFIG
last-modified:  2026-04-01T13:08:22Z
source:         APNIC

organisation:   ORG-ADO1-AP
org-name:       Australian Defence Organisation
org-type:       LIR
country:        AU
address:        Anzac Park West
address:        PO Box 7953
phone:          +61-2-6265-7647
fax-no:         +61-2-6265-53840
e-mail:         ciogsoftware.procurements@defence.gov.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:17Z
source:         APNIC

role:           ABUSE AUSDEFENCEAU
country:        ZZ
address:        Department of Defence
address:        Bonshaw Rd, HMAS Harman
address:        Cannberra, ACT 2600
address:        Australia
phone:          +000000000
e-mail:         architecture.support@defence.gov.au
admin-c:        RJ190-AP
tech-c:         RJ190-AP
nic-hdl:        AA2247-AP
remarks:        Generated from irt object IRT-AUS-DEFENCE-AU
remarks:        architecture.support@defence.gov.au is invalid
abuse-mailbox:  architecture.support@defence.gov.au
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-01T13:08:56Z
source:         APNIC

person:         ADF Hostmaster
address:        Australian Department of Defence
address:        109 Kent St, Deakin
address:        Canberra ACT 2600
country:        AU
phone:          +61 02 6265 8598
e-mail:         hostmaster@defence.gov.au
nic-hdl:        DHM2-AP
mnt-by:         MAINT-AU-DEFENCE
last-modified:  2008-09-04T07:29:32Z
source:         APNIC

person:         ADF Firewall Manager
address:        Australian Department of Defence
address:        109 Kent St, Deakin
address:        Canberra ACT 2600
country:        AU
phone:          +61 02 6265 8598
fax-no:         +61 02 6265 8924
e-mail:         fwmgr@defence.gov.au
nic-hdl:        FMGR1-AP
mnt-by:         MAINT-AU-DEFENCE
last-modified:  2008-09-04T07:29:32Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS17653 - AS18431",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2019-01-08",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS18220",
    "as_name" : "AUS-DEFENCE-AS-AP",
    "description" : [ "Australian Defence Organisation", "DCBN" ],
    "country" : "AU",
    "organization" : "ORG-ADO1-AP",
    "admin_contacts" : [ "FMGR1-AP" ],
    "tech_contacts" : [ "DHM2-AP" ],
    "abuse_contacts" : [ "AA2247-AP" ],
    "notify" : [ "hostmaster@defence.gov.au" ],
    "mnt_irt" : [ "IRT-AUS-DEFENCE-AU" ],
    "mnt_lower" : [ "MAINT-AU-DEFENCE" ],
    "mnt_routes" : [ "MAINT-AU-DEFENCE" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2021-01-15",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-AUS-DEFENCE-AU",
    "address" : [ "Department of Defence", "Bonshaw Rd, HMAS Harman", "Cannberra, ACT 2600", "Australia" ],
    "street" : "Bonshaw Rd Hmas Harman Cannberra",
    "state" : "ACT",
    "zip_code" : "2600",
    "country" : "AUSTRALIA",
    "email" : [ "architecture.support@defence.gov.au" ],
    "abuse_mailbox" : [ "architecture.support@defence.gov.au" ],
    "admin_contacts" : [ "RJ190-AP" ],
    "tech_contacts" : [ "RJ190-AP" ],
    "remarks" : [ "architecture.support@defence.gov.au is invalid" ],
    "mnt_by" : [ "MAINT-AU-DEF-MGMTCONFIG" ],
    "date_updated" : "2026-04-01",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-ADO1-AP",
    "name" : "Australian Defence Organisation",
    "type" : "LIR",
    "address" : [ "Anzac Park West", "PO Box 7953" ],
    "country" : [ "AU" ],
    "email" : [ "ciogsoftware.procurements@defence.gov.au" ],
    "phone" : [ "+61-2-6265-7647" ],
    "fax_no" : [ "+61-2-6265-53840" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "FMGR1-AP",
    "name" : "ADF Firewall Manager",
    "address" : [ "Australian Department of Defence", "109 Kent St, Deakin", "Canberra ACT 2600" ],
    "street" : "Kent St",
    "city" : "Canberra",
    "state" : "ACT",
    "zip_code" : "2600",
    "country" : "AU",
    "email" : [ "fwmgr@defence.gov.au" ],
    "phone" : [ "+61 02 6265 8598" ],
    "fax_no" : [ "+61 02 6265 8924" ],
    "mnt_by" : [ "MAINT-AU-DEFENCE" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "DHM2-AP",
    "name" : "ADF Hostmaster",
    "address" : [ "Australian Department of Defence", "109 Kent St, Deakin", "Canberra ACT 2600" ],
    "street" : "Kent St",
    "city" : "Canberra",
    "state" : "ACT",
    "zip_code" : "2600",
    "country" : "AU",
    "email" : [ "hostmaster@defence.gov.au" ],
    "phone" : [ "+61 02 6265 8598" ],
    "mnt_by" : [ "MAINT-AU-DEFENCE" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AA2247-AP",
    "name" : "ABUSE AUSDEFENCEAU",
    "address" : [ "Department of Defence", "Bonshaw Rd, HMAS Harman", "Cannberra, ACT 2600", "Australia" ],
    "street" : "Bonshaw Rd Hmas Harman Cannberra",
    "state" : "ACT",
    "zip_code" : "2600",
    "country" : "ZZ",
    "email" : [ "architecture.support@defence.gov.au" ],
    "abuse_mailbox" : [ "architecture.support@defence.gov.au" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "RJ190-AP" ],
    "tech_contacts" : [ "RJ190-AP" ],
    "remarks" : [ "Generated from irt object IRT-AUS-DEFENCE-AU", "architecture.support@defence.gov.au is invalid" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-04-01",
    "source" : "APNIC",
    "addressCountry" : "AUSTRALIA"
  } ]
}

Peers

AS Number	Description	Country
AS7474	SingTel Optus Pty Ltd	AU
AS38809	Vocus Advanced Services	AU
AS38809	VOCUS PTY LTD	AU

Upstreams

AS Number	Description	Country
AS7474	SingTel Optus Pty Ltd	AU
AS38809	VOCUS PTY LTD	AU

Contacts

Email Contacts

fwmgr@defence.gov.au architecture.support@defence.gov.au hostmaster@defence.gov.au

Abuse Contacts

architecture.support@defence.gov.au