203.40.0.0/13

AS1221  ·  Telstra Limited

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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 abuse@telstra.net
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:         abuse@telstra.net
abuse-mailbox:  abuse@telstra.net
admin-c:        TIAR-AP
tech-c:         TIAR-AP
auth:           # Filtered
remarks:        abuse@telstra.net 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:         corporateaddressing@team.telstra.com
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:         abuse@telstra.net
admin-c:        TIAR-AP
tech-c:         TIAR-AP
nic-hdl:        AT1005-AP
remarks:        Generated from irt object IRT-TELSTRA-AU
remarks:        abuse@telstra.net was validated on 2025-07-15
abuse-mailbox:  abuse@telstra.net
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:         ipnoc-au@team.telstra.com
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:         addressing@telstra.net
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
203.52.0.0/15 AS1221 Telstra Limited 131,072
203.102.0.0/15 AS703 Verizon Australia PTY Limited 131,072
203.231.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.227.0.0/16 AS9848 SEJONG NETWORKS 65,536
203.106.0.0/16 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 65,536
203.177.0.0/16 AS17894 Globe Telecom 65,536
203.180.0.0/16 AS2497 Internet Initiative Japan Inc. 65,536
203.231.0.0/16 AS9973 SEJONG NETWORKS 65,536
203.69.0.0/16 AS137280 Data Communication Business Group, 65,536
203.155.0.0/16 AS23644 KSC Commercial Internet Co. Ltd. 65,536
203.151.0.0/16 AS4618 Internet Thailand Company Limited 65,536
203.224.0.0/16 AS9273 ITCENENTEC CO.,LTD. 65,536
203.162.0.0/16 AS7643 Vietnam Posts and Telecommunications Group 65,536
203.155.0.0/16 AS7693 KSC Commercial Internet Co. Ltd. 65,536
203.182.0.0/16 AS4673 NTT DATA CORPORATION 65,536
203.59.0.0/16 AS4802 iiNet Limited 65,536
203.227.0.0/16 AS9973 SEJONG NETWORKS 65,536
203.108.0.0/16 AS703 OzEmail Pty Ltd 65,536
203.227.0.0/16 AS23584 SEJONG NETWORKS 65,536
203.162.0.0/16 AS45899 Vietnam Posts and Telecommunications Group 65,536
203.154.0.0/16 AS4618 Internet Thailand Company Limited 65,536
203.63.0.0/16 AS2764 AAPT Limited 65,536
203.177.0.0/16 AS4775 Globe Telecom 65,536
203.61.0.0/16 AS703 Verizon Australia PTY Limited 65,536
203.59.0.0/16 AS7545 iiNet Limited 65,536
203.157.0.0/16 AS9649 Ministry of Public Health, Thailand 65,536
203.125.0.0/16 AS3758 SingNet Pte Ltd 65,536
203.225.0.0/16 AS4766 KOLON BENIT 65,536
203.155.0.0/16 AS55844 KSC Commercial Internet Co. Ltd. 65,536
203.73.0.0/16 AS4780 Digital United Inc. 65,536
203.219.0.0/16 AS7545 TPG Internet Pty Ltd. 65,536
203.231.0.0/16 AS3608 SEJONG NETWORKS 65,536
203.177.0.0/16 AS132199 Globe Telecom 65,536
203.231.0.0/16 AS9684 SEJONG NETWORKS 65,536
203.231.0.0/16 AS23593 SEJONG NETWORKS 65,536
203.200.0.0/16 AS4755 Internet Service Provider 65,536
203.85.0.0/16 AS4058 CITIC Telecom International CPC Limited 65,536
203.197.0.0/16 AS4755 Internet Service Provider 65,536
203.177.0.0/16 AS24451 Globe Telecom 65,536
203.74.0.0/16 AS3462 Data Communication Business Group, 65,536
203.70.0.0/16 AS4780 Digital United Inc. 65,536
203.66.0.0/16 AS3462 Data Communication Business Group, 65,536
203.206.0.0/16 AS7545 iiNet Limited 65,536
203.75.0.0/16 AS3462 Data Communication Business Group, 65,536
203.231.0.0/16 AS131866 SEJONG NETWORKS 65,536
203.231.0.0/16 AS17881 SEJONG NETWORKS 65,536
203.155.0.0/16 AS45197 KSC Commercial Internet Co. Ltd. 65,536

Hosted domains

There are 1,244 domain names hosted across 581 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 lsmenvirocab.us 109
203.42.42.71 programmedinternational.com 60
203.42.226.4 russorecruitment.com.au 24
203.42.226.5 joblinx.com.au 24
203.43.194.19 urbanutilities.net 21
203.43.113.196 scholastic.com.au 21
203.46.43.125 digitalsignhire.au 17
203.41.57.175 metodayshareoffer.co.nz 15
203.43.113.202 avaanneappleton.com 14
203.44.36.180 gscms.com 13
203.41.240.241 redlandbayvet.com 11
203.43.23.61 lonelyplanettour.com 10
203.47.149.10 wilmarmills.net.au 9
203.47.237.4 ycu.com.au 9
203.45.199.168 natcan.com.au 9
203.43.88.227 shedstrowbridge.co.uk 8
203.43.150.60 tilesmart.com.au 8
203.41.91.245 aquadragons.co.nz 8
203.42.167.29 capricorncredit.com.au 8
203.41.44.29 2000fm.com 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

21,760 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.46.144.61 AS1221 Telstra Limited 1.06ms from Brisbane, AU
203.47.22.201 AS1221 Telstra Limited 2.66ms from Melbourne, AU
203.46.106.156 AS1221 Telstra Limited 1.19ms from Melbourne, AU
203.45.151.104 AS1221 Telstra Limited 2.09ms from Perth, AU
203.46.87.93 AS1221 Telstra Limited 1.00ms from Perth, AU
203.45.163.138 AS1221 Telstra Limited 2.55ms from Sydney, AU
203.46.160.129 AS1221 Telstra Limited 1.26ms from Sydney, AU
203.46.96.225 AS1221 Telstra Limited 1.54ms from Sydney, AU
203.46.201.2 AS1221 Telstra Limited 0.79ms from Sydney, AU
203.45.197.42 AS1221 Telstra Limited 1.93ms from Sydney, AU
203.47.93.152 AS1221 Telstra Limited 3.67ms from Sydney, AU
203.46.159.5 AS1221 Telstra Limited 0.84ms from Sydney, AU
203.47.8.82 AS1221 Telstra Limited 1.17ms from Sydney, AU
203.45.254.170 AS1221 Telstra Limited 2.16ms from Sydney, AU
203.46.4.221 AS1221 Telstra Limited 0.90ms from Sydney, AU
203.46.23.171 AS1221 Telstra Limited 1.37ms from Sydney, AU
203.45.193.1 AS1221 Telstra Limited 1.17ms from Adelaide, AU
203.45.249.46 AS1221 Telstra Limited 2.01ms from Brisbane, AU
203.45.168.186 AS1221 Telstra Limited 2.78ms from Brisbane, AU
203.46.206.89 AS1221 Telstra Limited 1.48ms from Melbourne, AU
203.46.42.121 AS1221 Telstra Limited 1.65ms from Melbourne, AU
203.46.189.253 AS1221 Telstra Limited 1.22ms from Melbourne, AU
203.47.30.134 AS1221 Telstra Limited 1.03ms from Melbourne, AU
203.47.99.229 AS1221 Telstra Limited 1.30ms from Sydney, AU
203.46.237.238 AS1221 Telstra Limited 2.67ms 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
91.93.174.253 AS34984 Superonline Iletisim Hizmetleri A.S. 1.68ms from Ankara, TR
144.24.95.13 AS31898 Oracle Corporation 0.17ms from Chuncheon, KR
144.228.97.157 AS174 Cogent Communications, LLC 0.70ms from Dallas, US
47.211.74.109 AS19108 Optimum 18.79ms from Dallas, US
93.107.128.93 AS15502 Vodafone Ireland Limited 2.37ms from Dublin, IE
90.252.85.29 AS5378 Vodafone Limited 14.60ms from Edinburgh, GB
82.61.65.253 AS3269 Telecom Italia S.p.A. 6.84ms from Milan, IT
123.252.131.125 AS17762 Tata Teleservices Maharashtra Ltd 0.49ms from Mumbai, IN
114.166.213.173 AS4713 NTT DOCOMO BUSINESS,Inc. 2.35ms from Osaka, JP
192.186.238.205 AS26496 GoDaddy.com, LLC 1.40ms from Phoenix, US
1.229.5.61 AS9318 SK Broadband Co Ltd 1.85ms from Seoul, KR
118.165.83.125 AS3462 Data Communication Business Group 1.20ms from Taipei, TW
82.168.213.13 AS1136 KPN B.V. 1.33ms from Amsterdam, NL
41.47.235.93 AS8452 TE-AS 7.89ms from Cairo, EG
91.54.41.205 AS3320 Deutsche Telekom AG 4.61ms from Duesseldorf, DE
59.57.253.237 AS4134 CHINANET-BACKBONE 5.34ms from Fuzhou, CN
162.209.196.109 AS40065 CNSERVERS LLC 0.19ms from Los Angeles, US
88.21.19.173 AS3352 TELEFONICA DE ESPANA S.A.U. 9.83ms from Madrid, ES
73.118.219.221 AS7922 Comcast Cable Communications, LLC 5.11ms from Seattle, US
112.181.101.237 AS4766 Korea Telecom 1.75ms from Seoul, KR
58.238.196.29 AS9318 SK Broadband Co Ltd 1.47ms from Seoul, KR
134.65.76.61 AS138341 SHOPEE SINGAPORE PRIVATE LIMITED 2.41ms from Singapore, SG
162.133.82.29 AS36351 IBM Cloud 0.57ms from Tokyo, JP
83.254.161.13 AS1257 Tele2 Sverige AB 5.04ms from Falkenberg, SE
178.26.69.253 AS3209 Vodafone GmbH 3.11ms from Hamburg, DE

Traceroute

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

$
traceroute -a -n -q1 -f5 203.47.241.73
traceroute to 203.47.241.73 (203.47.241.73): 64 hops max, 52 byte packets
5 [AS1221] 61.8.19.225 1.385 ms
6 [AS1221] 203.50.11.111 1.985 ms
8 [AS1221] 203.47.241.73 0.989 ms
Measurement taken from IPinfo ProbeNet in Melbourne, 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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