Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Active-threat / abuse risk −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
About Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecommunications company by market share.
⚠ 3 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS1221 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 159.222.184.0/24 | AS1221, AS38882 | 2026-10-12 23:28:48 |
| 160.187.61.0/24 | AS1221, AS136734 | 2026-10-12 23:28:48 |
| 148.80.1.0/24 | AS1221, AS4826 | 2026-10-12 23:28:48 |
Network profile
Source: PeeringDB →Web3 footprint
AS1221 hosts 26 observed decentralized-network nodes across 3 networks. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
AS1221 — global IP footprint
Cities where AS1221 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS1221 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 149.176.223.0/24 | 92,690 | 2026-10-12 23:23:45 |
| 203.12.62.0/24 | 32,733 | 2026-10-12 23:23:45 |
| 203.22.150.0/24 | 32,540 | 2026-10-12 23:23:45 |
| 203.30.92.0/23 | 32,004 | 2026-10-12 23:23:45 |
| 203.30.94.0/23 | 30,579 | 2026-10-12 23:23:45 |
| 203.4.196.0/24 | 29,541 | 2026-10-12 23:23:45 |
| 1.120.0.0/13 | 29,515 | 2026-10-12 23:29:16 |
| 149.176.116.0/24 | 29,450 | 2026-10-12 23:23:45 |
| 203.23.86.0/24 | 29,231 | 2026-10-12 23:23:45 |
| 203.20.87.0/24 | 29,080 | 2026-10-12 23:23:45 |
| 1.128.0.0/11 | 28,767 | 2026-10-12 23:23:13 |
| 192.74.139.0/24 | 28,719 | 2026-10-12 23:23:45 |
| 202.1.240.0/20 | 27,868 | 2026-10-12 23:23:45 |
| 203.18.35.0/24 | 27,711 | 2026-10-12 23:23:45 |
| 203.3.100.0/24 | 27,593 | 2026-10-12 23:23:45 |
| 203.22.147.0/24 | 27,248 | 2026-10-12 23:23:45 |
| 164.108.24.0/22 | 26,971 | 2026-10-12 23:23:45 |
| 149.176.221.0/24 | 26,941 | 2026-10-12 23:23:45 |
| 203.4.131.0/24 | 26,905 | 2026-10-12 23:23:45 |
| 202.8.92.0/24 | 25,902 | 2026-10-12 23:23:45 |
| 202.3.74.0/24 | 25,803 | 2026-10-12 23:23:45 |
| 164.108.17.0/24 | 25,631 | 2026-10-12 23:23:45 |
| 164.108.181.0/24 | 25,587 | 2026-10-12 23:23:45 |
| 164.108.10.0/24 | 25,576 | 2026-10-12 23:23:45 |
| 164.108.9.0/24 | 25,561 | 2026-10-12 23:23:45 |
| 203.4.192.0/24 | 24,976 | 2026-10-12 23:23:45 |
| 203.4.193.0/24 | 24,933 | 2026-10-12 23:23:45 |
| 203.22.83.0/24 | 24,902 | 2026-10-12 23:23:45 |
| 203.58.128.0/17 | 24,630 | 2026-10-12 23:23:45 |
| 203.3.101.0/24 | 24,618 | 2026-10-12 23:23:45 |
| 203.3.102.0/24 | 24,613 | 2026-10-12 23:23:45 |
| 203.16.140.0/24 | 24,610 | 2026-10-12 23:23:45 |
| 203.30.92.0/22 | 24,600 | 2026-10-12 23:23:45 |
| 203.26.245.0/24 | 24,594 | 2026-10-12 23:23:45 |
| 203.48.0.0/14 | 24,525 | 2026-10-12 23:23:45 |
| 203.40.0.0/13 | 24,519 | 2026-10-12 23:23:45 |
| 203.4.130.0/24 | 24,459 | 2026-10-12 23:23:45 |
| 203.18.112.0/20 | 24,440 | 2026-10-12 23:23:45 |
| 203.62.248.0/21 | 24,385 | 2026-10-12 23:23:45 |
| 203.34.229.0/24 | 24,376 | 2026-10-12 23:23:45 |
| 203.6.127.0/24 | 24,366 | 2026-10-12 23:23:45 |
| 203.143.192.0/18 | 24,361 | 2026-10-12 23:23:45 |
| 203.62.148.0/22 | 24,360 | 2026-10-12 23:23:45 |
| 203.34.228.0/24 | 24,356 | 2026-10-12 23:23:45 |
| 203.100.224.0/19 | 24,340 | 2026-10-12 23:23:45 |
| 203.58.64.0/18 | 24,328 | 2026-10-12 23:23:45 |
| 203.92.252.0/24 | 24,323 | 2026-10-12 23:23:45 |
| 203.58.32.0/19 | 24,315 | 2026-10-12 23:23:45 |
| 203.92.248.0/24 | 24,314 | 2026-10-12 23:23:45 |
| 203.34.68.0/24 | 24,308 | 2026-10-12 23:23:45 |
Showing top 50 of 292 announced prefixes by sample volume.
Frequently Asked Questions
What is AS1221?
AS1221 is an Autonomous System Number assigned to Telstra Limited. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS1221 announce?
AS1221 announces 13.39M IPv4 addresses distributed across 316 routed CIDR prefixes. The network is registered in Australia.
Who operates AS1221?
AS1221 is operated by Telstra Limited. The organization is based in Australia. You can view all IP ranges and related ASNs on the organization page.
What country is AS1221 registered in?
AS1221 is registered in Australia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
