203.52.0.0/15

AS1221  ·  Telstra Limited

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Summary

Country Australia
Domain telstra.net
ASN AS1221
Registry APNIC
ID TELSTRAINTERNET4-AU

WHOIS Details

inetnum:        203.52.0.0 - 203.53.255.255
netname:        TELSTRAINTERNET4-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
remarks:        -----
remarks:        All reports regarding SPAM or security breaches
remarks:        should be addressed to [email protected]
remarks:        ------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-AU-TIAR-AP
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 2026-01-26
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2026-01-26T01:19:20Z
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 2026-01-26
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2026-01-26T01:19:29Z
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:          203.52.0.0/15
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2019-12-11T21:09:32Z
source:         APNIC

route:          203.52.0.0/15
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:35:05Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.0.0.0/8

Range ASN Company Num of IPs
203.40.0.0/13 AS1221 Telstra Limited 524,288
203.36.0.0/14 AS1221 Telstra Limited 262,144
203.48.0.0/14 AS1221 Telstra Limited 262,144
203.102.0.0/15 AS703 Verizon Australia PTY Limited 131,072
203.108.0.0/16 AS703 OzEmail Pty Ltd 65,536
203.59.0.0/16 AS7545 iiNet Limited 65,536
203.182.0.0/16 AS4673 NTT DATA CORPORATION 65,536
203.63.0.0/16 AS2764 AAPT Limited 65,536
203.227.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.218.0.0/16 AS4760 PCCW Limited 65,536
203.177.0.0/16 AS132595 Globe Telecom 65,536
203.197.0.0/16 AS4755 Internet Service Provider 65,536
203.108.0.0/16 AS12234 OzEmail Pty Ltd 65,536
203.151.0.0/16 AS133529 Internet Thailand Company Limited 65,536
203.61.0.0/16 AS703 Verizon Australia PTY Limited 65,536
203.206.0.0/16 AS4739 iiNet Limited 65,536
203.206.0.0/16 AS7545 iiNet Limited 65,536
203.225.0.0/16 AS4766 KOLON BENIT 65,536
203.231.0.0/16 AS9684 SEJONG NETWORKS 65,536
203.231.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.200.0.0/16 AS4755 Internet Service Provider 65,536
203.106.0.0/16 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 65,536
203.151.0.0/16 AS4618 Internet Thailand Company Limited 65,536
203.180.0.0/16 AS2497 Internet Initiative Japan Inc. 65,536
203.177.0.0/16 AS132199 Globe Telecom 65,536
203.59.0.0/16 AS4739 iiNet Limited 65,536
203.155.0.0/16 AS135620 KSC Commercial Internet Co. Ltd. 65,536
203.219.0.0/16 AS7545 TPG Internet Pty Ltd. 65,536
203.200.0.0/16 AS40009 Internet Service Provider 65,536
203.155.0.0/16 AS23644 KSC Commercial Internet Co. Ltd. 65,536
203.35.0.0/16 AS1221 Telstra Limited 65,536
203.69.0.0/16 AS137280 Data Communication Business Group, 65,536
203.177.0.0/16 AS24179 Globe Telecom 65,536
203.54.0.0/16 AS1221 Telstra Limited 65,536
203.177.0.0/16 AS17894 Globe Telecom 65,536
203.157.0.0/16 AS9649 Ministry of Public Health, Thailand 65,536
203.177.0.0/16 AS24451 Globe Telecom 65,536
203.151.0.0/16 AS56223 Internet Thailand Company Limited 65,536
203.227.0.0/16 AS9973 SEJONG NETWORKS 65,536
203.73.0.0/16 AS4780 Digital United Inc. 65,536
203.231.0.0/16 AS214432 SEJONG NETWORKS 65,536
203.67.0.0/16 AS4780 Digital United Inc. 65,536
203.155.0.0/16 AS55844 KSC Commercial Internet Co. Ltd. 65,536
203.138.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
203.85.0.0/16 AS4058 CITIC Telecom International CPC Limited 65,536
203.162.0.0/16 AS7643 Vietnam Posts and Telecommunications Group 65,536
203.227.0.0/16 AS23584 SEJONG NETWORKS 65,536
203.74.0.0/16 AS3462 Data Communication Business Group, 65,536
203.125.0.0/16 AS3758 SingNet Pte Ltd 65,536

Hosted domains

There are 230 domain names hosted across 57 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.53.155.74 domescapesglamping.com.au 74
203.52.242.18 innotechtraining.com 22
203.53.139.210 lazercouriers.com.au 16
203.52.122.162 spencergulfprawns.com 14
203.53.241.97 dhs.vic.gov.au 14
203.52.55.226 satsof.au 10
203.53.74.182 frankonline.com.au 4
203.53.66.94 transparencyaustralia.com.au 4
203.52.111.174 reiforms.com.au 4
203.52.122.165 hostsa.com.au 4
203.52.42.126 simplytechnical.com.au 3
203.52.62.217 polywall.com.au 3
203.52.190.217 globusfamily.co.nz 3
203.53.17.22 portavin.com.au 3
203.52.113.248 borderofficesmart.com.au 2
203.53.155.145 psiglobal.com.au 2
203.52.6.69 flooringadvisor.com.au 2
203.52.131.210 legalaidtas.org.au 2
203.53.190.248 devocean.net 2
203.53.97.4 northews.com 2

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

1,584 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.52.197.41 AS1221 Telstra Limited 0.96ms from Brisbane, AU
203.52.49.90 AS1221 Telstra Limited 1.58ms from Brisbane, AU
203.52.42.126 AS1221 Telstra Limited 8.95ms from Melbourne, AU
203.52.171.140 AS1221 Telstra Limited 18.58ms from Perth, AU
203.52.106.246 AS1221 Telstra Limited 1.84ms from Perth, AU
203.52.215.121 AS1221 Telstra Limited 0.75ms from Sydney, AU
203.53.3.25 AS1221 Telstra Limited 1.11ms from Sydney, AU
203.52.239.242 AS1221 Telstra Limited 1.02ms from Sydney, AU
203.52.213.1 AS1221 Telstra Limited 2.08ms from Brisbane, AU
203.52.190.113 AS1221 Telstra Limited 0.98ms from Perth, AU
203.53.17.30 AS1221 Telstra Limited 0.86ms from Sydney, AU
203.52.164.133 AS1221 Telstra Limited 0.88ms from Melbourne, AU
203.52.119.99 AS1221 Telstra Limited 1.22ms from Perth, AU
203.52.236.78 AS1221 Telstra Limited 2.30ms from Sydney, AU
203.52.162.29 AS1221 Telstra Limited 11.83ms from Sydney, AU
203.52.153.164 AS1221 Telstra Limited 4.60ms from Adelaide, AU
203.52.242.29 AS1221 Telstra Limited 1.59ms from Brisbane, AU
203.52.254.177 AS1221 Telstra Limited 1.69ms from Melbourne, AU
203.52.146.25 AS1221 Telstra Limited 1.50ms from Melbourne, AU
203.52.208.65 AS1221 Telstra Limited 3.53ms from Brisbane, AU
203.52.109.17 AS1221 Telstra Limited 1.52ms from Melbourne, AU
203.52.172.153 AS1221 Telstra Limited 1.51ms from Perth, AU
203.53.1.33 AS1221 Telstra Limited 0.43ms from Sydney, AU
203.53.37.114 AS1221 Telstra Limited 0.72ms from Adelaide, AU
203.52.122.188 AS1221 Telstra Limited 1.28ms from Melbourne, 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
44.231.25.15 AS16509 Amazon.com, Inc. 0.15ms from Boardman, US
205.178.70.127 AS6079 RCN 0.60ms from Chicago, US
87.169.36.143 AS3320 Deutsche Telekom AG 5.85ms from Duesseldorf, DE
89.182.11.143 AS13045 htp GmbH 6.27ms from Frankfurt am Main, DE
183.2.160.175 AS4134 CHINANET-BACKBONE 2.16ms from Guangzhou, CN
124.61.79.31 AS17858 LG POWERCOMM 3.49ms from Incheon, KR
149.108.193.255 AS23700 Linknet-Fastnet ASN 13.11ms from Jakarta, ID
172.65.241.47 AS13335 Cloudflare, Inc. 0.11ms from Lisbon, PT
104.103.203.95 AS16625 Akamai Technologies, Inc. 0.42ms from London, GB
81.130.228.191 AS2856 British Telecommunications PLC 2.23ms from London, GB
86.151.63.95 AS2856 British Telecommunications PLC 3.12ms from London, GB
82.18.122.143 AS5089 Virgin Media Limited 10.92ms from London, GB
4.234.32.255 AS8075 Microsoft Corporation 0.26ms from London, GB
15.184.22.239 AS16509 Amazon.com, Inc. 0.09ms from Manama, BH
24.189.247.15 AS6128 Cablevision Systems Corp. 5.94ms from New York City, US
126.80.2.127 AS17676 SoftBank Corp. 1.94ms from Osaka, JP
54.221.76.159 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
71.149.255.255 AS7018 AT&T Enterprises, LLC 4.83ms from San Jose, US
174.27.69.15 AS209 CenturyLink Communications, LLC 10.20ms from Seattle, US
175.250.140.95 AS4766 Korea Telecom 6.16ms from Seoul, KR
176.69.80.255 AS1257 Tele2 Sverige AB 0.66ms from Stockholm, SE
175.181.69.255 AS4780 Digital United Inc. 0.43ms from Taipei, TW
126.39.68.207 AS17676 SoftBank Corp. 17.20ms from Tokyo, JP
41.99.73.127 AS36947 Telecom Algeria 12.02ms from Valencia, ES
39.98.151.127 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.25ms from Zhangjiakou, CN

Traceroute

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

$
traceroute -a -n -q1 -m7 203.52.33.185
traceroute to 203.52.33.185 (203.52.33.185): 7 hops max, 52 byte packets
1 [AS15169] 66.249.94.19 266.392 ms
2 [AS15169] 192.178.97.92 266.297 ms
3 *
4 [AS1221] 203.50.11.172 260.918 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Frankfurt am Main, DE
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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