ASN LANDING PAGE

AS1221

ASN-TELSTRA - Telstra Limited

Last updated · Jul 20, 2026

Country

—

Total prefixes

285

IPv4 prefixes

283

IPv6 prefixes

ASN summary

How to read the scale of AS1221

ASN-TELSTRA - Telstra Limited currently reports 285 prefixes and 54 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.

What can an ASN page answer?

An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.

How should you read the organization and region fields?

ASN-TELSTRA - Telstra Limited is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.

How should you verify the AS1221 result?

The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.

How to verify this ASN result

AS1221 ASN lookupAS1221 BGPAS1221 peersAS1221 prefixesAS1221 upstreamsASN-TELSTRA - Telstra Limited ASN

Upstreams

Detailed data for this ASN is not available right now.

Downstreams

Peers

AS4637

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AS132847

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AS4608

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AS35280

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AS36236

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AS7474

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AS38561

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AS4826

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AS3356

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AS17559

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AS7545

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AS10026

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AS63956

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AS149515

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Prefix inventory

Prefix	Name	Country
1.120.0.0/13	AS1221	—
1.128.0.0/11	AS1221	—
101.103.0.0/16	AS1221	—
101.160.0.0/11	AS1221	—
103.136.214.0/24	AS1221	—
103.136.215.0/24	AS1221	—
103.149.43.0/24	AS1221	—
103.195.64.0/24	AS1221	—
103.226.244.0/23	AS1221	—
103.247.118.0/23	AS1221	—
103.247.118.0/24	AS1221	—
103.247.119.0/24	AS1221	—
103.58.212.0/24	AS1221	—
103.58.34.0/24	AS1221	—
103.58.35.0/24	AS1221	—
103.78.241.0/24	AS1221	—
110.140.0.0/15	AS1221	—
110.142.0.0/16	AS1221	—
110.143.0.0/16	AS1221	—
110.144.0.0/13	AS1221	—
120.144.0.0/13	AS1221	—
120.152.0.0/14	AS1221	—
120.156.0.0/15	AS1221	—
120.158.0.0/16	AS1221	—
121.208.0.0/12	AS1221	—
122.200.24.0/23	AS1221	—
123.209.0.0/16	AS1221	—
123.210.0.0/15	AS1221	—
124.176.0.0/12	AS1221	—
125.255.0.0/16	AS1221	—
129.41.78.0/24	AS1221	—
136.238.200.0/24	AS1221	—
137.147.0.0/16	AS1221	—
138.130.0.0/16	AS1221	—
138.217.0.0/16	AS1221	—
139.130.0.0/16	AS1221	—
139.134.0.0/16	AS1221	—
139.168.0.0/16	AS1221	—
143.223.18.0/24	AS1221	—
143.223.87.0/24	AS1221	—

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Related lookups and next steps

Frequently asked questions about this ASN page

What does AS1221 represent?

AS1221 is an autonomous system number. The current source associates it with ASN-TELSTRA - Telstra Limited and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.

What are peers, upstreams, and prefixes useful for on the AS1221 page?

They help explain the scale, interconnection depth, and route structure of AS1221. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.

What should you do after reviewing AS1221?

Open a concrete IP page to check how the address maps into AS1221, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.