203.40.0.0/13

AS1221  ·  Telstra Limited

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

Summary

Country Australia
Domain telstra.net
ASN AS1221
Registry APNIC
ID TELSTRAINTERNET2-AU

WHOIS Details

inetnum:        203.40.0.0 - 203.47.255.255
netname:        TELSTRAINTERNET2-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
geofeed:        https://geofeed.tools.telstra.net/geofeed.csv
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:          203.40.0.0/13
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2019-12-11T21:09:26Z
source:         APNIC

route:          203.40.0.0/13
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:33:17Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.0.0.0/8

Range ASN Company Num of IPs
203.48.0.0/14 AS1221 Telstra Limited 262,144
203.36.0.0/14 AS1221 Telstra Limited 262,144
203.102.0.0/15 AS703 Verizon Australia PTY Limited 131,072
203.52.0.0/15 AS1221 Telstra Limited 131,072
203.227.0.0/16 AS23584 SEJONG NETWORKS 65,536
203.54.0.0/16 AS1221 Telstra Limited 65,536
203.35.0.0/16 AS1221 Telstra Limited 65,536
203.177.0.0/16 AS132199 Globe Telecom 65,536
203.154.0.0/16 AS132063 Internet Thailand Company Limited 65,536
203.231.0.0/16 AS9684 SEJONG NETWORKS 65,536
203.59.0.0/16 AS7545 iiNet Limited 65,536
203.231.0.0/16 AS17881 SEJONG NETWORKS 65,536
203.138.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
203.155.0.0/16 AS45197 KSC Commercial Internet Co. Ltd. 65,536
203.227.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.162.0.0/16 AS7643 Vietnam Posts and Telecommunications Group 65,536
203.231.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.151.0.0/16 AS4618 Internet Thailand Company Limited 65,536
203.154.0.0/16 AS4618 Internet Thailand Company Limited 65,536
203.206.0.0/16 AS7545 iiNet Limited 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
203.231.0.0/16 AS3608 SEJONG NETWORKS 65,536
203.224.0.0/16 AS9273 ITCENENTEC CO.,LTD. 65,536
203.231.0.0/16 AS23593 SEJONG NETWORKS 65,536
203.182.0.0/16 AS4673 NTT DATA CORPORATION 65,536
203.108.0.0/16 AS703 OzEmail Pty Ltd 65,536
203.219.0.0/16 AS7545 TPG Internet Pty Ltd. 65,536
203.69.0.0/16 AS137280 Data Communication Business Group, 65,536
203.108.0.0/16 AS12234 OzEmail Pty Ltd 65,536
203.227.0.0/16 AS9973 SEJONG NETWORKS 65,536
203.69.0.0/16 AS3462 Data Communication Business Group, 65,536
203.106.0.0/16 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 65,536
203.157.0.0/16 AS9649 Ministry of Public Health, Thailand 65,536
203.63.0.0/16 AS2764 AAPT Limited 65,536
203.64.0.0/16 AS1659 Taiwan Academic Network 65,536
203.177.0.0/16 AS4775 Globe Telecom 65,536
203.73.0.0/16 AS4780 Digital United Inc. 65,536
203.59.0.0/16 AS4802 iiNet Limited 65,536
203.155.0.0/16 AS7693 KSC Commercial Internet Co. Ltd. 65,536
203.231.0.0/16 AS9973 SEJONG NETWORKS 65,536
203.177.0.0/16 AS17894 Globe Telecom 65,536
203.162.0.0/16 AS45899 Vietnam Posts and Telecommunications Group 65,536
203.68.0.0/16 AS1659 Taiwan Academic Network 65,536
203.85.0.0/16 AS4058 CITIC Telecom International CPC Limited 65,536
203.225.0.0/16 AS4766 KOLON BENIT 65,536
203.67.0.0/16 AS4780 Digital United Inc. 65,536
203.70.0.0/16 AS4780 Digital United Inc. 65,536
203.206.0.0/16 AS4739 iiNet Limited 65,536

Hosted domains

There are 1,242 domain names hosted across 580 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.44.179.107 lsmtech.au 109
203.42.42.71 pmsltd.com.au 60
203.42.226.5 srglobalinitiative.au 24
203.42.226.4 alliedvoice.net.au 24
203.43.113.196 scholastic.com.au 21
203.43.194.19 urbanutilities.net 21
203.46.43.125 trailerskips.au 16
203.41.57.175 comvitashareoffer.co.nz 15
203.43.113.202 avaanneappleton.com.au 14
203.44.36.180 oneglb.com 13
203.41.240.241 vetsincranbourne.com 11
203.43.23.61 132days.co.uk 10
203.47.149.10 wilmarmills.net.au 9
203.47.237.4 auswidebrokers.net.au 9
203.45.199.168 nci-packaging.com.au 9
203.42.167.29 matthies.com.au 8
203.41.91.245 sylvanian.com.au 8
203.47.58.237 cea.net.au 8
203.47.237.22 widebayaus.com.au 8
203.45.229.161 macquariedowns.com.au 8

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

22,101 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.42.157.157 AS1221 Telstra Limited 1.10ms from Adelaide, AU
203.42.214.154 AS1221 Telstra Limited 1.14ms from Brisbane, AU
203.43.109.76 AS1221 Telstra Limited 1.08ms from Melbourne, AU
203.43.158.101 AS1221 Telstra Limited 10.91ms from Melbourne, AU
203.43.198.209 AS1221 Telstra Limited 5.11ms from Perth, AU
203.44.22.1 AS1221 Telstra Limited 2.18ms from Sydney, AU
203.43.204.96 AS1221 Telstra Limited 39.26ms from Adelaide, AU
203.43.255.217 AS1221 Telstra Limited 4.63ms from Brisbane, AU
203.43.207.77 AS1221 Telstra Limited 0.99ms from Brisbane, AU
203.42.122.18 AS1221 Telstra Limited 1.16ms from Melbourne, AU
203.42.184.219 AS1221 Telstra Limited 1.65ms from Melbourne, AU
203.42.100.206 AS1221 Telstra Limited 2.47ms from Melbourne, AU
203.42.77.97 AS1221 Telstra Limited 10.30ms from Sydney, AU
203.42.224.175 AS1221 Telstra Limited 8.78ms from Sydney, AU
203.42.187.11 AS1221 Telstra Limited 2.34ms from Brisbane, AU
203.43.65.3 AS1221 Telstra Limited 0.76ms from Brisbane, AU
203.43.147.241 AS1221 Telstra Limited 1.08ms from Brisbane, AU
203.42.190.115 AS1221 Telstra Limited 1.26ms from Melbourne, AU
203.43.104.1 AS1221 Telstra Limited 0.91ms from Melbourne, AU
203.43.191.195 AS1221 Telstra Limited 0.82ms from Melbourne, AU
203.43.45.102 AS1221 Telstra Limited 1.22ms from Sydney, AU
203.44.8.18 AS1221 Telstra Limited 24.94ms from Brisbane, AU
203.43.103.96 AS1221 Telstra Limited 1.07ms from Melbourne, AU
203.43.83.222 AS1221 Telstra Limited 0.77ms from Melbourne, AU
203.43.141.229 AS1221 Telstra Limited 23.55ms from Perth, 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
178.255.195.253 AS21221 Infopact Netwerkdiensten B.V. 0.56ms from Amsterdam, NL
5.54.4.253 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 0.99ms from Athens, GR
125.37.193.61 AS4837 CHINA UNICOM China169 Backbone 5.06ms from Beijing, CN
125.18.213.125 AS9498 BHARTI Airtel Ltd. 0.84ms from Bengaluru, IN
73.9.116.13 AS7922 Comcast Cable Communications, LLC 5.35ms from Chicago, US
50.24.49.93 AS19108 Optimum 8.88ms from Dallas, US
88.70.249.29 AS3209 Vodafone GmbH 4.22ms from Hamburg, DE
185.159.199.173 AS396501 CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet 0.14ms from Johannesburg, ZA
4.187.164.221 AS8075 Microsoft Corporation 0.14ms from Lohogaon, IN
46.56.56.13 AS25106 Mobile TeleSystems JLLC 4.53ms from Minsk, BY
123.252.131.125 AS17762 Tata Teleservices Maharashtra Ltd 0.50ms from Mumbai, IN
58.240.152.221 AS4837 CHINA UNICOM China169 Backbone 1.66ms from Nanjing, CN
178.186.242.205 AS12389 PJSC Rostelecom 5.51ms from Novosibirsk, RU
5.130.80.61 AS31200 Novotelecom Ltd 1.11ms from Novosibirsk, RU
39.76.133.93 AS4837 CHINA UNICOM China169 Backbone 4.59ms from Qingdao, CN
112.173.40.141 AS4766 Korea Telecom 8.20ms from Seoul, KR
49.143.121.93 AS9319 HCN CHUNGBUK CABLE TV SYSTEMS 2.97ms from Seoul, KR
159.223.56.93 AS14061 DigitalOcean, LLC 0.19ms from Singapore, SG
176.100.166.189 AS48851 Radware Ltd 0.57ms from Tel Aviv, IL
139.13.83.61 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 10.24ms from Berlin, DE
170.176.215.205 AS16509 Amazon.com, Inc. 0.17ms from Columbus, US
96.53.117.205 AS6327 Shaw Communications 0.61ms from Edmonton, CA
212.12.39.93 AS9211 Nawork Internet Informationssysteme GmbH 0.19ms from Hamburg, DE
200.58.85.253 AS27839 Comteco Ltda 4.66ms from La Paz, BO
148.216.88.29 AS11172 Alestra, S. de R.L. de C.V. 6.81ms from Mexico City, MX

Traceroute

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

$
traceroute -a -n -q1 -f3 -m15 203.41.170.109
traceroute to 203.41.170.109 (203.41.170.109): 15 hops max, 52 byte packets
3 [AS8966] 5.195.70.164 3.791 ms
6 *
7 [AS4637] 202.84.140.105 121.325 ms
8 [AS1221] 203.50.9.12 124.96 ms
9 [AS1221] 203.50.6.236 147.704 ms
10 [AS1221] 203.50.11.157 148.922 ms
11 [AS1221] 203.50.11.64 149.516 ms
12 [AS1221] 139.130.0.30 163.412 ms
13 *
14 *
15 *
Measurement taken from IPinfo ProbeNet in Al Fujairah City, AE
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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs