203.17.40.0/21

AS1221  ·  Telstra Limited

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Summary

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

WHOIS Details

inetnum:        203.17.40.0 - 203.17.47.255
netname:        TELSTRAINTERNET-AU
descr:          Telstra Limited
country:        AU
org:            ORG-TC6-AP
admin-c:        TIAR-AP
tech-c:         TAN2-AP
status:         ALLOCATED PORTABLE
abuse-c:        AT1005-AP
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
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:          203.17.40.0/21
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2021-01-22T04:40:10Z
source:         APNIC

route:          203.17.40.0/21
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:17:47Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.17.0.0/16

Range ASN Company Num of IPs
203.17.168.0/21 AS9893 Cenitex 2,048
203.17.96.0/21 AS4739 iiNet Limited 2,048
203.17.76.0/22 AS17766 Nexon Asia Pacific Pty Ltd 1,024
203.17.32.0/22 AS24543 First Data Resources Australia 1,024
203.17.204.0/22 AS4826 Mitsubishi Electric Australia Pty Ltd 1,024
203.17.148.0/22 AS38611 Bendigo Community Telco Limited 1,024
203.17.240.0/22 AS140065 CiFi Pty Ltd 1,024
203.17.220.0/23 AS8075 AUSTRADE 512
203.17.212.0/23 AS38333 My Net Fone Limited 512
203.17.244.0/23 AS137409 GSL Networks Pty LTD 512
203.17.245.0/24 AS137409 GSL Networks Pty LTD - Amsterdam 256
203.17.137.0/24 AS150151 SKY COMMUNICATIONS INTERNET SERVICES 256
203.17.177.0/24 AS154167 Rackmill 256
203.17.138.0/24 AS16509 SingTel Optus Pty Ltd 256
203.17.165.0/24 AS16509 Uniware Managed Services Pty Ltd 256
203.17.236.0/24 AS17632 Barristers' Chambers Limited, 256
203.17.70.0/24 AS17807 State Library of Queensland 256
203.17.23.0/24 AS17882 Univision LLC 256
203.17.126.0/24 AS209242 LACHTARISTO HOLDINGS LIMITED 256
203.17.123.0/24 AS212384 Private Customer 256
203.17.66.0/24 AS34414 Nokia Solutions and Networks Australia Pty Ltd 256
203.17.226.0/24 AS38424 KOREA CABLE TELECOM 256
203.17.36.0/24 AS38719 Dreamscape Networks PTY LTD 256
203.17.166.0/24 AS45158 ISW Technology Pty Ltd 256
203.17.253.0/24 AS45240 Realestate.com.au Limited 256
203.17.225.0/24 AS45570 Active Ideas Pty. Ltd. 256
203.17.185.0/24 AS45867 Commonwealth Bank of Australia 256
203.17.7.0/24 AS4826 City Of Kwinana 256
203.17.93.0/24 AS4826 Denver Technology 256
203.17.65.0/24 AS63996 MD Rehanur Rahman t/a M/S FNF Online 256
203.17.251.0/24 AS7545 Data Analysis Australia 256
203.17.8.0/24 AS7545 TPG Internet Pty Ltd. 256
203.17.215.0/24 AS7637 State Library of Victoria 256
203.17.29.0/24 AS7703 Westway Nominees Pty Ltd t/a Bekkers 256
203.17.73.0/24 AS9268 Ultrahost Pty Ltd 256
203.17.167.0/24 AS9336 ID Interdomain 256
203.17.120.0/24 AS9893 Cenitex 256
203.17.31.0/24 AS10215 Microland Limited 256
203.17.163.0/24 AS9942 TPG Internet Pty Ltd. 256
203.17.237.0/24 AS10557 UAB code200 256
203.17.162.0/24 AS1221 Telstra Limited 256
203.17.194.0/24 AS131302 294/3 Vidhya Nagari Marg 256
203.17.12.0/24 AS134802 Naic Cable TV Corp. 256
203.17.180.0/24 AS135600 Whiz Communications Pte Ltd 256
203.17.181.0/24 AS135600 Whiz Communications Pte Ltd 256
203.17.214.0/24 AS136518 Department of Planning, Lands and Heritage 256
203.17.193.0/24 AS136572 The Office of the Chief Information Officer (OCIO) 256
203.17.154.0/24 AS137060 The Club Group Pty Limited 256
203.17.244.0/24 AS137409 GSL Networks Pty LTD - Amsterdam 256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.17.42.59 stratinnova.net 1

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
59.110.173.229 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 2.03ms from Beijing, CN
208.54.36.133 AS21928 T-Mobile USA, Inc. 1.79ms from Boston, US
189.42.245.165 AS4230 CLARO S.A. 15.86ms from Brasilia, BR
94.146.205.181 AS9158 Telenor A/S 2.21ms from Copenhagen, DK
209.101.7.149 AS30058 FDCservers.net 0.24ms from Frankfurt am Main, DE
218.23.151.149 AS4134 CHINANET-BACKBONE 9.48ms from Huai'an, CN
18.175.2.21 AS16509 Amazon.com, Inc. 0.16ms from London, GB
87.248.33.53 AS12850 Retelit Digital Services S.p.A. 0.19ms from Milan, IT
5.139.131.101 AS12389 PJSC Rostelecom 16.88ms from Moscow, RU
59.55.35.37 AS4134 CHINANET-BACKBONE 7.76ms from Nanchang, CN
176.209.203.213 AS12389 PJSC Rostelecom 5.49ms from Novosibirsk, RU
72.164.241.69 AS209 CenturyLink Communications, LLC 12.54ms from Phoenix, US
71.59.235.101 AS7922 Comcast Cable Communications, LLC 6.87ms from Portland, US
93.91.56.21 AS44489 STARNET, s.r.o. 2.42ms from Prague, CZ
211.13.57.85 AS2518 BIGLOBE Inc. 8.39ms from Tokyo, JP
207.65.139.85 AS2527 Sony Network Communications Inc. 2.44ms from Tokyo, JP
213.77.23.53 AS5617 Orange Polska Spolka Akcyjna 0.36ms from Warsaw, PL
109.75.68.69 AS59931 Lebanon Online SARL 1.96ms from Beirut, LB
58.161.114.213 AS1221 Telstra Limited 8.97ms from Brisbane, AU
94.53.68.101 AS48161 NEXTGEN COMMUNICATIONS SRL 1.27ms from Bucharest, RO
158.142.11.165 AS36691 Colorado State University 3.47ms from Denver, US
179.156.54.117 AS28573 Claro NXT Telecomunicacoes Ltda 17.86ms from Fortaleza, BR
112.100.29.5 AS17897 asn for Heilongjiang Provincial Net of CT 16.32ms from Liaoyang, CN
213.78.235.245 AS13285 TalkTalk Communications Limited 9.86ms from London, GB
3.8.208.37 AS16509 Amazon.com, Inc. 0.67ms from London, GB

Traceroute

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

$
traceroute -a -n -q1 -m17 203.17.44.1
traceroute to 203.17.44.1 (203.17.44.1): 17 hops max, 52 byte packets
1 [AS42473] 217.146.0.38 0.171 ms
3 [AS58430] 103.11.12.93 0.607 ms
5 *
7 [AS4637] 210.57.38.57 275.916 ms
8 *
9 [AS4637] 202.84.140.105 73.165 ms
10 [AS1221] 203.50.9.12 74.39 ms
11 [AS1221] 203.50.6.236 100.268 ms
12 [AS1221] 203.50.6.122 114.431 ms
13 [AS1221] 203.50.13.124 114.392 ms
14 [AS1221] 203.50.13.132 126.59 ms
15 *
16 *
17 *
Measurement taken from IPinfo ProbeNet in Bangkok, TH
On

What are IP address ranges?

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