203.6.127.0/24

AS1221 · Telstra Limited

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Summary

Country	Australia
Domain	defence.gov.au
ASN	AS1221
Registry	APNIC
ID	AUSDEFENCE

WHOIS Details

inetnum:        203.6.64.0 - 203.6.127.255
netname:        AUSDEFENCE
descr:          Australian Defence Organization
descr:          Department of Defence
descr:          ANZAC Park West
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:  2024-11-21T00:44:23Z
source:         APNIC

irt:            IRT-AUS-DEFENCE-AU
address:        Department of Defence
address:        Bonshaw Rd, HMAS Harman
address:        Cannberra, ACT 2600
address:        Australia
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        RJ190-AP
tech-c:         RJ190-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-09-17
mnt-by:         MAINT-AU-DEF-MGMTCONFIG
last-modified:  2025-11-18T00:27:25Z
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:         [email protected]
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:         [email protected]
admin-c:        RJ190-AP
tech-c:         RJ190-AP
nic-hdl:        AA2247-AP
remarks:        Generated from irt object IRT-AUS-DEFENCE-AU
remarks:        [email protected] was validated on 2025-09-17
abuse-mailbox:  [email protected]
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:         [email protected]
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:         [email protected]
nic-hdl:        FMGR1-AP
mnt-by:         MAINT-AU-DEFENCE
last-modified:  2008-09-04T07:29:32Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.6.0.0/16

Range	ASN	Company	Num of IPs
203.6.0.0/18	AS7575	Australian Department of Defence	16,384
203.6.0.0/18	AS7474	Australian Department of Defence	16,384
203.6.0.0/18	AS9466	Australian Department of Defence	16,384
203.6.160.0/19	AS18431	Department of Foreign Affairs and Trade	8,192
203.6.224.0/20	AS58519	CHINANET Guangdong province network	4,096
203.6.148.0/23	AS55684	Universitas Sebelas Maret	512
203.6.146.0/23	AS136572	The Office of the Chief Information Officer (OCIO)	512
203.6.144.0/23	AS7575	Australian War Memorial	512
203.6.141.0/24	AS56132	Monash University	256
203.6.137.0/24	AS7545	Bluechip Infotech Pty Ltd	256
203.6.143.0/24	AS7545	BMW AUSTRALIA LTD	256
203.6.241.0/24	AS4764	aboc IT Consulting	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
203.6.250.0/24	AS24436	Anglican Church Grammar School	256
203.6.251.0/24	AS24476	RURAL PRESS PTY LIMITED	256
203.6.246.0/24	AS45475	Bluff Trading Ltd.	256
203.6.208.0/24	AS135003	MISPL Internet Services (Pvt) Ltd	256

Hosted domains

There are no domains currently hosted on this ASN.

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

Read more

Pingable IPs

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

IP Address	ASN	Details
203.6.127.37	AS1221 Telstra Limited	`2.01ms` 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
41.141.55.88	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`11.81ms` from Casablanca, MA
69.128.172.56	AS4181 TDS TELECOM	`6.01ms` from Chicago, US
183.142.54.136	AS4134 CHINANET-BACKBONE	`7.45ms` from Hangzhou, CN
103.142.82.248	AS149513 Vertex Connectivity LLC	`0.70ms` from Hong Kong, HK
118.141.33.88	AS9304 HGC Global Communications Limited	`1.15ms` from Hong Kong, HK
39.43.4.104	AS17557 Pakistan Telecommunication Company Limited	`14.02ms` from Islamabad, PK
68.82.218.152	AS7922 Comcast Cable Communications, LLC	`7.26ms` from Morris Plains, US
74.76.101.24	AS11351 Charter Communications Inc	`9.99ms` from New York City, US
92.174.130.184	AS3215 Orange S.A.	`1.35ms` from Paris, FR
123.142.144.56	AS3786 LG DACOM Corporation	`2.02ms` from Seoul, KR
188.166.214.232	AS14061 DigitalOcean, LLC	`0.21ms` from Singapore, SG
154.3.166.232	AS174 Cogent Communications, LLC	`0.58ms` from Toronto, CA
85.127.94.104	AS8412 T-Mobile Austria GmbH	`4.68ms` from Vienna, AT
193.111.208.168	AS202015 HZ Hosting Ltd	`1.47ms` from Dallas, US
81.77.116.136	AS5378 Vodafone Limited	`10.02ms` from London, GB
133.18.121.248	AS24282 KAGOYA JAPAN Inc.	`0.99ms` from Osaka, JP
122.196.98.104	AS9617 JCOM Co., Ltd.	`11.04ms` from Osaka, JP
121.132.143.104	AS4766 Korea Telecom	`1.70ms` from Seoul, KR
211.196.206.232	AS4766 Korea Telecom	`1.44ms` from Seoul, KR
180.15.190.40	AS4713 NTT DOCOMO BUSINESS,Inc.	`16.01ms` from Tokyo, JP
91.179.207.8	AS5432 Proximus NV	`3.74ms` from Brussels, BE
123.179.86.72	AS4134 CHINANET-BACKBONE	`8.64ms` from Hohhot, CN
72.235.195.168	AS36149 Hawaiian Telcom Services Company, Inc.	`1.02ms` from Honolulu, US
41.139.176.184	AS37061 Safaricom Limited	`6.84ms` from Nairobi, KE
83.112.201.184	AS3215 Orange S.A.	`6.54ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f6 203.6.127.121

traceroute to 203.6.127.121 (203.6.127.121): 64 hops max, 52 byte packets

6 [AS1221] 138.217.181.65 0.25 ms

7 [AS1221] 203.50.12.132 2.205 ms

8 [AS1221] 203.50.11.101 0.725 ms

9 [AS1221] 203.50.11.104 1.136 ms

10 [AS1221] 139.130.190.178 1.638 ms

11 [AS1221] 203.6.127.121 2.231 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On December 6th 2025

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.

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