All IP Ranges
203.0.0.0/8
AS1221 | 203.48.0.0/14

203.48.0.0/14

AS1221 · Telstra Limited

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Summary

Country	Australia
Domain	telstra.net
ASN	AS1221
Registry	APNIC
ID	TELSTRAINTERNET3-AU

WHOIS Details

inetnum:        203.48.0.0 - 203.51.255.255
netname:        TELSTRAINTERNET3-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:          203.48.0.0/14
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2019-12-11T21:09:29Z
source:         APNIC

route:          203.48.0.0/14
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:34:11Z
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
203.52.0.0/15	AS1221	Telstra Limited	131,072
203.102.0.0/15	AS703	Verizon Australia PTY Limited	131,072
203.227.0.0/16	AS23584	SEJONG NETWORKS	65,536
203.162.0.0/16	AS7643	Vietnam Posts and Telecommunications Group	65,536
203.231.0.0/16	AS131866	SEJONG NETWORKS	65,536
203.224.0.0/16	AS9273	ITCENENTEC CO.,LTD.	65,536
203.219.0.0/16	AS7545	TPG Internet Pty Ltd.	65,536
203.182.0.0/16	AS4673	NTT DATA CORPORATION	65,536
203.162.0.0/16	AS45899	Vietnam Posts and Telecommunications Group	65,536
203.74.0.0/16	AS131660	Data Communication Business Group,	65,536
203.225.0.0/16	AS4766	KOLON BENIT	65,536
203.157.0.0/16	AS9649	Ministry of Public Health, Thailand	65,536
203.151.0.0/16	AS56223	Internet Thailand Company Limited	65,536
203.54.0.0/16	AS1221	Telstra Limited	65,536
203.73.0.0/16	AS4780	Digital United Inc.	65,536
203.61.0.0/16	AS703	Verizon Australia PTY Limited	65,536
203.206.0.0/16	AS7545	iiNet Limited	65,536
203.59.0.0/16	AS7545	iiNet Limited	65,536
203.155.0.0/16	AS7693	KSC Commercial Internet Co. Ltd.	65,536
203.177.0.0/16	AS4775	Globe Telecom	65,536
203.155.0.0/16	AS45197	KSC Commercial Internet Co. Ltd.	65,536
203.231.0.0/16	AS23593	SEJONG NETWORKS	65,536
203.155.0.0/16	AS23644	KSC Commercial Internet Co. Ltd.	65,536
203.154.0.0/16	AS4618	Internet Thailand Company Limited	65,536
203.138.0.0/16	AS2514	NTT PC Communications,Inc.	65,536
203.67.0.0/16	AS4780	Digital United Inc.	65,536
203.218.0.0/16	AS4760	PCCW Limited	65,536
203.108.0.0/16	AS703	OzEmail Pty Ltd	65,536
203.35.0.0/16	AS1221	Telstra Limited	65,536
203.155.0.0/16	AS17478	KSC Commercial Internet Co. Ltd.	65,536
203.177.0.0/16	AS132595	Globe Telecom	65,536
203.231.0.0/16	AS9684	SEJONG NETWORKS	65,536
203.70.0.0/16	AS4780	Digital United Inc.	65,536
203.85.0.0/16	AS4058	CITIC Telecom International CPC Limited	65,536
203.106.0.0/16	AS4788	TM TECHNOLOGY SERVICES SDN. BHD.	65,536
203.108.0.0/16	AS12234	OzEmail Pty Ltd	65,536
203.151.0.0/16	AS4618	Internet Thailand Company Limited	65,536
203.231.0.0/16	AS17881	SEJONG NETWORKS	65,536
203.69.0.0/16	AS3462	Data Communication Business Group,	65,536
203.59.0.0/16	AS4802	iiNet Limited	65,536
203.75.0.0/16	AS3462	Data Communication Business Group,	65,536
203.63.0.0/16	AS2764	AAPT Limited	65,536
203.155.0.0/16	AS55844	KSC Commercial Internet Co. Ltd.	65,536
203.74.0.0/16	AS3462	Data Communication Business Group,	65,536
203.231.0.0/16	AS9848	SEJONG NETWORKS	65,536
203.197.0.0/16	AS4755	Internet Service Provider	65,536
203.69.0.0/16	AS137280	Data Communication Business Group,	65,536

Hosted domains

There are 389 domain names hosted across 190 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.49.29.70	kelcar.com.au	45
203.51.37.128	beekeepersignature.com.vn	14
203.48.112.143	pcs.nt.edu.au	13
203.51.37.176	beagoodhuman.charity	13
203.49.88.145	legendcorporate.com	13
203.48.29.225	acdcpowermonitor.net	10
203.51.4.15	mashedspud.com	7
203.51.51.192	apisaus.com	7
203.51.52.2	adapt-ed.com.au	6
203.49.158.10	gerundclub.com	6
203.51.31.185	cohga.zip	5
203.48.111.114	ecotiptoe.com.au	5
203.51.38.58	antonynya.com	5
203.49.148.202	visyboard.com.au	4
203.51.32.189	msar.com.au	4
203.48.111.50	transportdelight.com	4
203.51.38.33	allthethings.au	4
203.48.244.144	elginvalleyfreerange.com	3
203.51.53.39	opticognito.au	3
203.49.43.90	hyper-mega.net	3

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

Read more

Pingable IPs

3,978 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.51.52.23	AS1221 Telstra Limited	`1.98ms` from Sydney, AU
203.51.53.214	AS1221 Telstra Limited	`1.84ms` from Sydney, AU
203.51.30.117	AS1221 Telstra Limited	`2.86ms` from Adelaide, AU
203.51.12.148	AS1221 Telstra Limited	`4.71ms` from Brisbane, AU
203.51.48.95	AS1221 Telstra Limited	`1.26ms` from Sydney, AU
203.51.39.229	AS1221 Telstra Limited	`2.22ms` from Sydney, AU
203.50.239.133	AS1221 Telstra Limited	`31.37ms` from Adelaide, AU
203.51.27.124	AS1221 Telstra Limited	`3.54ms` from Melbourne, AU
203.51.31.247	AS1221 Telstra Limited	`2.26ms` from Adelaide, AU
203.51.4.83	AS1221 Telstra Limited	`2.86ms` from Perth, AU
203.50.233.157	AS1221 Telstra Limited	`0.50ms` from Melbourne, AU
203.51.24.7	AS1221 Telstra Limited	`2.89ms` from Melbourne, AU
203.50.240.162	AS1221 Telstra Limited	`0.59ms` from Sydney, AU
203.50.248.6	AS1221 Telstra Limited	`0.64ms` from Melbourne, AU
203.51.38.3	AS1221 Telstra Limited	`2.85ms` from Sydney, AU
203.51.28.136	AS1221 Telstra Limited	`2.18ms` from Adelaide, AU
203.50.246.162	AS1221 Telstra Limited	`0.64ms` from Melbourne, AU
203.51.0.225	AS1221 Telstra Limited	`5.11ms` from Perth, AU
203.50.244.162	AS1221 Telstra Limited	`0.42ms` from Sydney, AU
203.50.241.243	AS1221 Telstra Limited	`0.47ms` from Sydney, AU
203.50.234.7	AS1221 Telstra Limited	`10.29ms` from Melbourne, AU
203.51.36.24	AS1221 Telstra Limited	`2.01ms` from Sydney, AU
203.51.64.20	AS1221 Telstra Limited	`6.16ms` from Sydney, AU
203.51.40.231	AS1221 Telstra Limited	`1.53ms` from Adelaide, AU
203.51.13.113	AS1221 Telstra Limited	`8.54ms` from Brisbane, 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
179.15.140.46	AS27831 Colombia Móvil	`15.58ms` from Bogotá, CO
75.244.150.206	AS6167 Verizon Business	`16.76ms` from Dallas, US
141.84.226.254	AS12816 Leibniz-Rechenzentrum	`8.46ms` from Frankfurt am Main, DE
1.48.225.46	AS4134 CHINANET-BACKBONE	`9.27ms` from Guiyang, CN
109.85.130.206	AS3209 Vodafone GmbH	`0.96ms` from Hamburg, DE
114.100.212.94	AS4134 CHINANET-BACKBONE	`8.07ms` from Huai'an, CN
36.63.203.78	AS4134 CHINANET-BACKBONE	`6.67ms` from Huai'an, CN
58.26.187.254	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`6.56ms` from Kuala Lumpur, MY
92.105.177.126	AS3303 Swisscom (Switzerland) Ltd	`0.92ms` from Lugano, CH
148.3.179.190	AS12430 VODAFONE ESPANA S.A.U.	`7.77ms` from Madrid, ES
80.181.44.30	AS3269 Telecom Italia S.p.A.	`5.49ms` from Milan, IT
160.154.247.254	AS29571 Orange Côte d'Ivoire	`14.88ms` from Monrovia, LR
178.141.138.238	AS8359 MTS PJSC	`16.28ms` from Moscow, RU
95.189.229.142	AS12389 PJSC Rostelecom	`8.72ms` from Novosibirsk, RU
71.214.91.254	AS209 CenturyLink Communications, LLC	`0.45ms` from Orlando, US
212.4.33.206	AS2119 Telenor Norge AS	`5.57ms` from Oslo, NO
88.125.209.78	AS12322 Free SAS	`3.39ms` from Paris, FR
61.220.165.254	AS3462 Data Communication Business Group	`1.29ms` from Taipei, TW
124.218.34.254	AS7482 Asia Pacific On-line Service Inc.	`1.36ms` from Taipei, TW
117.55.124.94	AS17676 SoftBank Corp.	`3.24ms` from Tokyo, JP
62.47.167.254	AS8447 A1 Telekom Austria AG	`0.52ms` from Vienna, AT
31.149.164.46	AS1136 KPN B.V.	`0.44ms` from Amsterdam, NL
185.87.249.254	AS48635 Your Hosting B.V.	`0.26ms` from Amsterdam, NL
85.149.9.62	AS5390 EuroNet	`1.05ms` from Amsterdam, NL
85.17.207.126	AS60781 LeaseWeb Netherlands B.V.	`0.27ms` from Amsterdam, NL

Traceroute

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

traceroute -a -n -q1 -m6 203.48.211.187

traceroute to 203.48.211.187 (203.48.211.187): 6 hops max, 52 byte packets

1 [AS15169] 142.250.224.122 146.603 ms

2 *

3 [AS1221] 203.50.11.197 146.96 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Delhi, IN

On January 9th 2026

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