203.18.112.0/20

AS1221  ·  Telstra Limited

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Summary

Country Australia
Domain telstra.net
ASN AS1221
Registry APNIC
ID TELSTRAINTERNET-AU

WHOIS Details

inetnum:        203.18.112.0 - 203.18.127.255
netname:        TELSTRAINTERNET-AU
descr:          Telstra Limited
country:        AU
org:            ORG-TC6-AP
admin-c:        TIAR-AP
tech-c:         TAN2-AP
abuse-c:        AT1005-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-routes:     MAINT-AU-TIAR-AP
mnt-irt:        IRT-TELSTRA-AU
last-modified:  2024-05-10T00:50:23Z
source:         APNIC

irt:            IRT-TELSTRA-AU
address:        Telstra Internet
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-07-15
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2025-11-18T00:26:24Z
source:         APNIC

organisation:   ORG-TC6-AP
org-name:       Telstra Limited
org-type:       LIR
country:        AU
address:        242 Exhibition Street
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2024-12-06T08:30:50Z
source:         APNIC

role:           ABUSE TELSTRAAU
country:        ZZ
address:        Telstra Internet
phone:          +000000000
e-mail:         [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
nic-hdl:        AT1005-AP
remarks:        Generated from irt object IRT-TELSTRA-AU
remarks:        [email protected] was validated on 2025-07-15
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-07-15T22:43:15Z
source:         APNIC

role:           Telstra AU NOC
address:        Telstra Internet
address:        242 Exhibition Street
address:        Melbourne
address:        VIC 3000
country:        AU
phone:          +61 3 8650 3305
e-mail:         [email protected]
admin-c:        TIAR-AP
tech-c:         TIAR-AP
nic-hdl:        TAN2-AP
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2025-11-26T05:11:17Z
source:         APNIC

person:         Telstra Internet Address Registry
address:        Telstra Internet
address:        242 Exhibition St
address:        Melbourne
address:        VIC 3000
country:        AU
phone:          +61 000000000
e-mail:         [email protected]
nic-hdl:        TIAR-AP
remarks:        Telstra Internet Address Registry Role Object
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2021-12-09T22:28:56Z
source:         APNIC

route:          203.18.112.0/20
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2019-12-11T21:08:43Z
source:         APNIC

route:          203.18.112.0/20
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:18:41Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.18.0.0/16

Range ASN Company Num of IPs
203.18.216.0/21 AS38600 Smart Axiata Co., Ltd. 2,048
203.18.88.0/22 AS153162 Gadens 1,024
203.18.108.0/23 AS9650 CITEC 512
203.18.242.0/23 AS136000 LYNHAM NETWORKS PTY. LTD 512
203.18.156.0/23 AS152617 PPTECH co., ltd. 512
203.18.158.0/23 AS154109 Hosting Oxygen 512
203.18.96.0/23 AS37978 Launceston City Council 512
203.18.212.0/23 AS4826 VOCUS PTY LTD 512
203.18.60.0/23 AS6262 CSIRO Marine Labs, Hobart 512
203.18.184.0/23 AS9328 DEPARTMENT OF FINANCE 512
203.18.54.0/24 AS17378 Thales Australia 256
203.18.58.0/24 AS17477 Schwartz Family Company 256
203.18.26.0/24 AS24222 RR Donnelley India Outsource Private Limited 256
203.18.151.0/24 AS9266 Fiveways International Limited 256
203.18.50.0/24 AS38564 NVIDIA-ASIA 256
203.18.39.0/24 AS131769 CV Prestasi Sukses Gemilang 256
203.18.137.0/24 AS45765 4th Floor, Weikfield IT Park 256
203.18.94.0/24 AS9268 Over The Wire Pty Ltd 256
203.18.240.0/24 AS4826 Netway Technologies Pty Ltd 256
203.18.56.0/24 AS4826 BOMBORA TECHNOLOGIES PTY LTD 256
203.18.51.0/24 AS56166 ITI (Gas Rahat Building) Campus 256
203.18.197.0/24 AS56229 PT LNS TEKNOLOGI SOLUSINDO 256
203.18.98.0/24 AS56971 Mistic Internet Security Pty Ltd 256
203.18.177.0/24 AS10103 Colliers International Pacific Ltd 256
203.18.0.0/24 AS7477 SkyMesh Pty Ltd 256
203.18.11.0/24 AS7545 Wigtown Bear Pty Ltd 256
203.18.79.0/24 AS7545 Hi-Speed Networking 256
203.18.1.0/24 AS7575 National Gallery of Victoria 256
203.18.63.0/24 AS7575 Powerhouse Museum 256
203.18.59.0/24 AS134673 GISBORNE.NET.N.Z. LIMITED 256
203.18.23.0/24 AS7600 Escapenet Pty Ltd 256
203.18.104.0/24 AS136938 PT Yoan Corp Indonesian 256
203.18.174.0/24 AS142590 Ambulance Victoria 256
203.18.78.0/24 AS7647 OnTheNet Pty Ltd 256
203.18.30.0/24 AS133159 Mammoth Media Pty Ltd 256
203.18.176.0/24 AS852 Colliers International Canada 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

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
92.98.65.148 AS5384 Emirates Internet 4.83ms from Al Fujairah City, AE
178.10.247.148 AS3209 Vodafone GmbH 7.11ms from Berlin, DE
186.128.9.100 AS22927 Telefonica de Argentina 2.22ms from Buenos Aires, AR
74.241.254.4 AS8075 Microsoft Corporation 0.26ms from Gaevle, SE
185.183.20.20 AS43872 Optinet U.K. Limited 0.20ms from London, GB
44.220.147.132 AS14618 Amazon.com, Inc. 0.47ms from Reston, US
47.33.161.132 AS20115 Charter Communications LLC 17.39ms from Seattle, US
211.221.145.36 AS4766 Korea Telecom 1.34ms from Seoul, KR
1.235.175.212 AS9318 SK Broadband Co Ltd 1.51ms from Seoul, KR
52.62.174.180 AS16509 Amazon.com, Inc. 0.16ms from Sydney, AU
54.252.150.52 AS16509 Amazon.com, Inc. 0.12ms from Sydney, AU
124.167.93.84 AS4837 CHINA UNICOM China169 Backbone 7.75ms from Taiyuan, CN
111.176.30.196 AS4134 CHINANET-BACKBONE 5.21ms from Wuhan, CN
182.127.221.228 AS4837 CHINA UNICOM China169 Backbone 7.39ms from Zhengzhou, CN
198.253.132.20 AS668 United States Department of Defense (DoD) 0.51ms from Atlanta, US
98.21.194.100 AS7029 Windstream Communications LLC 6.04ms from Atlanta, US
123.119.65.196 AS4808 China Unicom Beijing Province Network 2.73ms from Beijing, CN
175.34.47.132 AS4804 Microplex PTY LTD 1.73ms from Brisbane, AU
177.66.158.132 AS52656 CISS Consultoria em Inf. Serv. e Software S.A 9.88ms from Curitiba, BR
37.83.26.52 AS3320 Deutsche Telekom AG 16.68ms from Frankfurt am Main, DE
14.247.253.4 AS45899 VNPT Corp 2.40ms from Hanoi, VN
103.233.234.148 AS4760 HKT Limited 8.09ms from Hong Kong, HK
80.234.236.68 AS5413 Wavenet Limited 8.75ms from London, GB
46.26.184.212 AS12430 VODAFONE ESPANA S.A.U. 13.35ms from Madrid, ES
74.73.97.244 AS12271 Charter Communications Inc 4.18ms from New York City, US

Traceroute

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

$
traceroute -a -n -q1 -m10 203.18.112.126
traceroute to 203.18.112.126 (203.18.112.126): 10 hops max, 52 byte packets
1 [AS15169] 66.249.94.19 275.84 ms
2 [AS15169] 192.178.97.92 275.737 ms
3 *
4 [AS1221] 203.50.11.172 278.568 ms
5 [AS1221] 203.50.11.95 277.794 ms
6 [AS1221] 203.50.11.103 295.736 ms
7 [AS1221] 165.228.102.190 295.271 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Madrid, ES
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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