203.27.128.0/18

AS1221 · Telstra Limited

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

Summary

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

WHOIS Details

inetnum:        203.27.128.0 - 203.27.191.255
netname:        TELSTRAINTERNET-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 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:          203.27.128.0/18
origin:         AS1221
descr:          Telstra Corporation 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2019-12-11T21:09:02Z
source:         APNIC

route:          203.27.128.0/18
origin:         AS19905
descr:          Telstra Corporation Limited 242 Exhibition Street
mnt-by:         MAINT-AU-TIAR-AP
last-modified:  2022-09-12T02:26:05Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.27.0.0/16

Range	ASN	Company	Num of IPs
203.27.238.0/23	AS135399	Blackmores Ltd	512
203.27.104.0/23	AS58734	Brisbane Convention and Exhibition Centre	512
203.27.106.0/23	AS137409	GSL Networks Pty LTD	512
203.27.42.0/23	AS136154	Rockhampton City Council	512
203.27.72.0/24	AS1221	Glencore Australia Holdings Pty Ltd	256
203.27.118.0/24	AS132847	Network Solutions Group Pty Ltd	256
203.27.92.0/24	AS133758	Knowledge by Design Pty Ltd	256
203.27.96.0/24	AS135409	Kacific Broadband Satellites Pte ltd	256
203.27.97.0/24	AS135409	Kacific Broadband Satellites Pte ltd	256
203.27.11.0/24	AS135893	CAVAL Limited	256
203.27.77.0/24	AS136518	Department of Commerce (WA)	256
203.27.18.0/24	AS137267	CBROS Technologies Limited	256
203.27.106.0/24	AS137409	GSL Networks Pty LTD - Singapore	256
203.27.107.0/24	AS137409	GSL Networks Pty LTD - Singapore	256
203.27.126.0/24	AS151499	Australian Public Access Network Association	256
203.27.34.0/24	AS154248	PT Telemedia Cakra Nusantara	256
203.27.201.0/24	AS16276	Server Pro Sweden AB	256
203.27.235.0/24	AS17436	ICICIBank Ltd, India	256
203.27.231.0/24	AS17551	Anycast Holdings Pty Ltd	256
203.27.98.0/24	AS17807	Queensland Art Gallery	256
203.27.44.0/24	AS23727	Managed Solutions Internet	256
203.27.199.0/24	AS23854	NINE ENTERTAINMENT CO. PTY LTD	256
203.27.78.0/24	AS23871	WarpSpeed Computers Pty. Ltd.	256
203.27.30.0/24	AS2764	Ashurst Australia Services Pty Limited	256
203.27.58.0/24	AS29222	E-DOOR SARL	256
203.27.21.0/24	AS38084	Ethan Group Pty Ltd	256
203.27.116.0/24	AS38195	SUPERLOOP (AUSTRALIA) PTY LTD	256
203.27.62.0/24	AS38572	Mater Misericordiae Limited	256
203.27.60.0/24	AS45780	Vigen Pty Ltd	256
203.27.225.0/24	AS4739	DEPARTMENT FOR EDUCATION	256
203.27.101.0/24	AS4764	G. P. STERN PTY LTD	256
203.27.5.0/24	AS4826	City Of Perth	256
203.27.52.0/24	AS4826	City of Salisbury	256
203.27.127.0/24	AS55467	Ice media Pty. Ltd.	256
203.27.87.0/24	AS56113	Challenger Group Services Ltd	256
203.27.197.0/24	AS7545	iiNet Limited	256
203.27.198.0/24	AS7545	iiNet Limited	256
203.27.63.0/24	AS7575	Ivanhoe Grammer School	256
203.27.47.0/24	AS7637	State Library of Victoria	256
203.27.19.0/24	AS800	WorldVu Australia Pty Ltd.	256
203.27.70.0/24	AS9009	Formosa Sydney Pty Limited	256
203.27.223.0/24	AS10143	C3 Church Sydney Ltd	256
203.27.67.0/24	AS9627	TCR Holdings Limted.	256
203.27.253.0/24	AS10753	Kellogg (AUST) Pty Ltd.	256
203.27.193.0/24	AS1221	Victoria State Emergency Service Authority	256
203.27.56.0/24	AS1221	RPMGLOBAL HOLDINGS LIMITED	256
203.27.69.0/24	AS1221	Telstra Limited	256

Hosted domains

There are 29 domain names hosted across 20 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.27.182.150	teamlifting.au	4
203.27.179.118	containeryard.com.au	3
203.27.179.82	myfuel.au	3
203.27.180.198	aceceramics.com	3
203.27.178.246	murujugact.com.au	1
203.27.189.70	zoomphone.au	1
203.27.183.154	paxaus.com.au	1
203.27.140.229	seqformwork.com.au	1
203.27.183.146	skytrax.com.au	1
203.27.176.10	ljhstafford.com.au	1
203.27.179.10	gasair.com.au	1
203.27.138.61	greenmtf.com.au	1
203.27.145.84	braziermotti.com	1
203.27.185.54	hfs.training	1
203.27.181.130	freechoice.net.au	1
203.27.145.87	montocoal.com.au	1
203.27.144.139	alexmehl.com.au	1
203.27.141.77	gpsids.com	1
203.27.182.134	srmc.net.au	1
203.27.177.78	daleys.com.au	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

Read more

Pingable IPs

1,290 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.27.179.213	AS1221 Telstra Limited	`0.62ms` from Sydney, AU
203.27.176.157	AS1221 Telstra Limited	`0.68ms` from Sydney, AU
203.27.181.250	AS1221 Telstra Limited	`0.45ms` from Sydney, AU
203.27.186.38	AS1221 Telstra Limited	`0.72ms` from Sydney, AU
203.27.145.133	AS1221 Telstra Limited	`2.21ms` from Sydney, AU
203.27.180.221	AS1221 Telstra Limited	`0.65ms` from Sydney, AU
203.27.177.77	AS1221 Telstra Limited	`0.58ms` from Sydney, AU
203.27.191.137	AS1221 Telstra Limited	`0.67ms` from Sydney, AU
203.27.182.237	AS1221 Telstra Limited	`0.67ms` from Sydney, AU
203.27.190.233	AS1221 Telstra Limited	`0.66ms` from Sydney, AU
203.27.178.113	AS1221 Telstra Limited	`0.63ms` from Sydney, AU
203.27.187.89	AS1221 Telstra Limited	`0.69ms` from Sydney, AU
203.27.185.129	AS1221 Telstra Limited	`0.59ms` from Sydney, AU
203.27.189.38	AS1221 Telstra Limited	`0.61ms` from Sydney, AU
203.27.188.118	AS1221 Telstra Limited	`0.28ms` from Sydney, AU
203.27.184.165	AS1221 Telstra Limited	`0.70ms` from Sydney, AU
203.27.183.153	AS1221 Telstra Limited	`0.61ms` 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
81.28.225.2	AS29014 ScaleUp Technologies GmbH & Co. KG	`0.47ms` from Berlin, DE
20.159.10.2	AS8070 Microsoft Corporation	`0.77ms` from Boydton, US
160.177.49.130	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`5.58ms` from Casablanca, MA
128.210.42.146	AS17 Purdue University	`5.63ms` from Chicago, US
185.176.30.130	AS34244 Teleservice Bredband Skane AB	`2.58ms` from Copenhagen, DK
76.184.78.98	AS11427 Charter Communications Inc	`7.10ms` from Dallas, US
104.239.131.2	AS33070 Rackspace Hosting	`1.13ms` from Dallas, US
41.149.64.2	AS37457 Telkom SA Ltd.	`1.56ms` from Johannesburg, ZA
204.15.164.18	AS35937 MarquisNet	`6.61ms` from Los Angeles, US
173.9.152.2	AS7922 Comcast Cable Communications, LLC	`4.79ms` from Miami, US
79.42.134.226	AS3269 Telecom Italia S.p.A.	`6.07ms` from Milan, IT
74.119.56.2	AS27401 KLDiscovery Ontrack, LLC	`3.24ms` from Minneapolis, US
35.132.249.50	AS20115 Charter Communications LLC	`17.48ms` from Murfreesboro, US
79.52.153.2	AS3269 Telecom Italia S.p.A.	`4.61ms` from Naples, IT
45.47.164.210	AS11351 Charter Communications Inc	`10.87ms` from New York City, US
65.51.22.98	AS54004 Optimum WiFi	`1.92ms` from New York City, US
179.100.46.66	AS27699 TELEFÔNICA BRASIL S.A	`3.15ms` from Osasco, BR
193.69.9.130	AS2116 GLOBALCONNECT AS	`1.97ms` from Sandefjord, NO
187.209.158.242	AS8151 UNINET	`11.44ms` from Santiago de Queretaro, MX
60.111.193.242	AS17676 SoftBank Corp.	`2.89ms` from Tokyo, JP
77.173.249.2	AS1136 KPN B.V.	`3.86ms` from Amsterdam, NL
23.52.90.226	AS20940 Akamai International B.V.	`0.25ms` from Atlanta, US
168.10.76.2	AS3480 Board of Regents of the University System of Georgia	`16.31ms` from Atlanta, US
108.196.166.226	AS7018 AT&T Enterprises, LLC	`3.05ms` from Atlanta, US
81.193.250.162	AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`8.32ms` from Braga, PT

Traceroute

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

traceroute -a -n -q1 -f2 -m7 203.27.136.236

traceroute to 203.27.136.236 (203.27.136.236): 7 hops max, 52 byte packets

2 [AS15169] 192.178.98.32 266.735 ms

3 *

4 [AS1221] 203.50.11.172 271.649 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Brussels, BE

On December 6th 2025

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.

Get Started for Free Contact Sales