203.6.0.0/18

AS7474  ·  SingTel Optus Pty Ltd

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Summary

Country Australia
Domain defence.gov.au
ASN AS7474
Registry APNIC
ID AUSDEFENCE

WHOIS Details

inetnum:        203.6.0.0 - 203.6.63.255
netname:        AUSDEFENCE
descr:          Australian Department of Defence
descr:          Bonshaw Rd, HMAS Harman
descr:          Canberra ACT 2600
country:        AU
org:            ORG-ADO1-AP
admin-c:        FMGR1-AP
tech-c:         DHM2-AP
abuse-c:        AA2247-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-AU-DEFENCE
mnt-routes:     MAINT-AU-DEFENCE
mnt-irt:        IRT-AUS-DEFENCE-AU
last-modified:  2021-01-15T01:28:25Z
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 was validated on 2025-09-17
mnt-by:         MAINT-AU-DEF-MGMTCONFIG
last-modified:  2025-09-17T02:14:50Z
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 was validated on 2025-09-17
abuse-mailbox:  architecture.support@defence.gov.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-17T02:15:21Z
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

route:          203.6.0.0/18
origin:         AS7474
descr:          Australian Defence Organisation APW-G-034 PO Box 7953
mnt-by:         MAINT-AU-DEFENCE
last-modified:  2020-10-22T04:20:17Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.6.0.0/16

Range ASN Company Num of IPs
203.6.160.0/19 AS18431 Department of Foreign Affairs and Trade 8,192
203.6.192.0/20 AS46073 Reed Elsevier Australia Pty Ltd 4,096
203.6.224.0/20 AS58519 CHINANET Guangdong province network 4,096
203.6.144.0/23 AS7575 Australian War Memorial 512
203.6.146.0/23 AS136572 The Office of the Chief Information Officer (OCIO) 512
203.6.148.0/23 AS55684 Universitas Sebelas Maret 512
203.6.141.0/24 AS56132 Monash University 256
203.6.137.0/24 AS7545 Bluechip Infotech Pty Ltd 256
203.6.208.0/24 AS135003 MISPL Internet Services (Pvt) Ltd 256
203.6.209.0/24 AS135003 MISPL Internet Services (Pvt) Ltd 256
203.6.210.0/24 AS135003 MISPL Internet Services (Pvt) Ltd 256
203.6.211.0/24 AS135003 MISPL Internet Services (Pvt) Ltd 256
203.6.255.0/24 AS7575 CSIRO Australia Telescope National Facility 256
203.6.241.0/24 AS4764 aboc IT Consulting 256
203.6.246.0/24 AS45475 Bluff Trading Ltd. 256
203.6.250.0/24 AS24436 Anglican Church Grammar School 256
203.6.251.0/24 AS24476 RURAL PRESS PTY LIMITED 256
203.6.143.0/24 AS7545 BMW AUSTRALIA LTD 256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.6.18.248 spmal.com 1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity

Pingable IPs

934 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.6.33.225 AS9466 UUNET Japan Limited 4.96ms from Sydney, AU
203.6.5.1 AS7474 SingTel Optus Pty Ltd 110.22ms from Sydney, AU
203.6.32.81 AS9466 UUNET Japan Limited 4.97ms from Sydney, AU
203.6.31.234 AS9466 UUNET Japan Limited 0.76ms from Sydney, AU
203.6.3.1 AS7474 SingTel Optus Pty Ltd 80.31ms from Sydney, AU
203.6.58.253 AS7474 SingTel Optus Pty Ltd 55.66ms from Sydney, AU
203.6.24.2 AS7474 SingTel Optus Pty Ltd 53.06ms from Sydney, AU
203.6.22.1 AS7474 SingTel Optus Pty Ltd 82.59ms from Sydney, AU
203.6.36.245 AS9466 UUNET Japan Limited 0.77ms from Sydney, AU
203.6.20.1 AS7474 SingTel Optus Pty Ltd 101.81ms from Sydney, AU
203.6.63.1 AS7474 SingTel Optus Pty Ltd 54.52ms from Sydney, AU
203.6.61.98 AS7474 SingTel Optus Pty Ltd 56.51ms from Sydney, AU
203.6.62.1 AS7474 SingTel Optus Pty Ltd 54.20ms from Sydney, AU

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
50.27.69.146 AS19108 Optimum 16.77ms from Ashburn, US
185.139.14.34 AS49020 Elie Achkar trading as FiberSkynet 3.00ms from Beirut, LB
93.180.80.34 AS47292 Sentia Denmark A/S 1.09ms from Copenhagen, DK
67.228.204.178 AS36351 IBM Cloud 1.09ms from Dallas, US
52.59.63.98 AS16509 Amazon.com, Inc. 0.14ms from Frankfurt am Main, DE
91.59.214.18 AS3320 Deutsche Telekom AG 6.86ms from Frankfurt am Main, DE
117.1.188.146 AS7552 Viettel Group 3.45ms from Hanoi, VN
91.154.230.2 AS719 Elisa Oyj 3.14ms from Helsinki, FI
171.252.35.114 AS7552 Viettel Group 0.71ms from Ho Chi Minh City, VN
43.255.102.2 AS14127 Iland Internet Solutions Corporation 0.93ms from Melbourne, AU
3.97.36.226 AS16509 Amazon.com, Inc. 0.11ms from Montreal, CA
64.15.129.194 AS32613 Leaseweb Canada Inc. 0.89ms from Montreal, CA
109.61.132.50 AS12389 PJSC Rostelecom 12.69ms from Moscow, RU
58.13.107.194 AS17506 ARTERIA Networks Corporation 1.27ms from Osaka, JP
201.117.77.242 AS8151 UNINET 2.96ms from Santiago de Queretaro, MX
175.196.235.66 AS4766 Korea Telecom 1.57ms from Seoul, KR
14.70.154.114 AS4766 Korea Telecom 2.95ms from Seoul, KR
85.25.220.2 AS29066 velia.net Internetdienste GmbH 1.05ms from Strasbourg, FR
186.82.242.2 AS10620 Telmex Colombia S.A. 2.22ms from Bogota, CO
188.250.68.66 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 2.09ms from Braga, PT
31.217.129.50 AS4455 IX Reach Ltd 0.40ms from Dubai, AE
93.204.68.242 AS3320 Deutsche Telekom AG 1.74ms from Hamburg, DE
2.241.154.50 AS6805 Telefonica Germany GmbH & Co.OHG 2.10ms from Hamburg, DE
60.162.227.178 AS4134 CHINANET-BACKBONE 10.29ms from Hangzhou, CN
122.143.101.226 AS4837 CHINA UNICOM China169 Backbone 11.37ms from Liaoyang, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f2 -m8 203.6.15.180
traceroute to 203.6.15.180 (203.6.15.180): 8 hops max, 52 byte packets
5 [AS7474] 59.154.65.177 0.575 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Adelaide, AU
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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