AS1221

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Summary

IP address summary information
Name	Telstra Limited
Country	Australia
Website	host.io/telstra.com.au·telstra.com.au
Hosted domains	7,704
IPv4 addresses	13,399,808
IPv6 addresses	3.25 × 10³²
ASN type	ISP
Registry	APNIC
Allocated	26 years ago on Jan 31, 2000
Updated	2 years ago on May 3, 2024

Ranking

#43

Overall rank

among 74,696 networks

Traffic

#38

Infrastructure

#66

#1inAustralia

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

Australia
100%

Held location over 90 days: 90%
Held location over 1 year: 91%
Median days between moves: 225 days
Geolocation scope: National

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
1.128.0.0/11	Telstra Limited	2,097,152
101.160.0.0/11	Telstra Limited	2,097,152
58.160.0.0/12	Telstra Limited	1,048,576
121.208.0.0/12	Telstra Limited	1,048,576
124.176.0.0/12	Telstra Limited	1,048,576
1.120.0.0/13	Telstra Limited	524,288
60.224.0.0/13	Telstra Limited	524,288
110.144.0.0/13	Telstra Limited	524,288
120.144.0.0/13	Telstra Limited	524,288
203.40.0.0/13	Telstra Limited	524,288

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 7,704 domain names hosted across 3,996 IP addresses on this ASN.

IP Address	Domain	Count
203.39.65.64		277
203.18.35.206		198
203.18.34.246		179
203.18.34.151		154
203.18.34.23		154

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs4,153
Hotel996
Retail361
Restaurant344

Category	In AS1221	Example IP

Places

Peers

There are 50 peers for this ASN.

ASN	Name	Rank

Upstreams

There are 2 upstreams for this ASN.

ASN	Name	Rank
AS3356	Level 3 Parent, LLC
AS4637	Telstra Global

Downstreams

There are 50 downstreams for this ASN.

ASN	Name	Rank

Pingable IPs

26,739 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more

IP Address	ASN	Details
1.158.217.174 Ping	AS1221Telstra Limited	1.81ms from Adelaide, AU
1.121.128.180 Ping	AS1221Telstra Limited	2.05ms from Adelaide, AU
1.121.219.248 Ping	AS1221Telstra Limited	8.69ms from Adelaide, AU
60.225.163.155 Ping	AS1221Telstra Limited	7.83ms from Adelaide, AU
101.185.99.49 Ping	AS1221Telstra Limited	8.15ms from Adelaide, AU
101.174.63.254 Ping	AS1221Telstra Limited	1.60ms from Adelaide, AU
203.58.218.10 Ping	AS1221Telstra Limited	6.37ms from Adelaide, AU
1.158.161.70 Ping	AS1221Telstra Limited	1.71ms from Adelaide, AU
101.174.150.66 Ping	AS1221Telstra Limited	34.19ms from Adelaide, AU
60.231.54.37 Ping	AS1221Telstra Limited	1.62ms from Adelaide, AU

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS1221


1.140.127.254	Sydney, Australia
139.130.124.150	Melbourne, Australia
203.54.181.214	Sydney, Australia
2001:8003:0:bdf:f0:3:9:0	Melbourne, Australia
2001:8003:0:bdf:f0:7:52:0	Townsville, Australia
2001:8003:0:bdf:f0:2:10:0	Sydney, Australia
1.141.127.254	Brisbane, Australia
2001:8003:0:bdf:f0:7:1:0	Brisbane, Australia
2001:8003:0:bdf:f0:9:1:0	Perth, Australia
203.50.12.132	Sydney, Australia

Important routers in AS1221

Traceroute

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

$ traceroute -a -n -q1 -f2 1.121.239.78

traceroute to 1.121.239.78 (1.121.239.78): 64 hops max, 52 byte packets

2 [AS136557] 103.216.222.142 0.086 ms

3 [AS136557] 103.216.222.140 0.086 ms

4 [AS136557] 103.216.222.20 0.118 ms

5 [AS136557] 103.216.222.19 0.28 ms

6 [AS136557] 103.216.222.210 0.794 ms

7 *

8 *

9 *

10 [AS1221] 110.145.209.37 1.29 ms

11 [AS1221] 203.50.6.14 2.024 ms

12 [AS1221] 203.50.61.193 0.656 ms

13 [AS1221] 1.121.255.254 2.545 ms

14 [AS1221] 1.121.239.78 5.272 ms

Measurement taken from

IPinfo ProbeNet in Adelaide, AU

On September 17, 2026

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS1221 at robtex.

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AS1221

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS1221

Important routers in AS1221

Traceroute

Related Networks

AS135275

AS136939

AS150801

AS154167

AS18213

What is an ASN?

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

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

Important routers in AS1221

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

IP Ranges

Places

AS135275

AS136939

AS150801

AS154167

AS18213

AS19705