Australia · ISP
AS1221
Telstra Limited
ISP APNIC ASN-TELSTRA
Telstra carries most Australian retail traffic and effectively all of its long-haul transit. 1.120.0.0/13 comes out of the late 1.0.0.0/8 allocation APNIC spent years cleaning up.
ISP — Residential eyeball network. Addresses here look like customers, because they are.
- Announced prefixes
- 6
- 5 IPv4 · 1 IPv6
- IPv4 addresses
- 2.9M
- across the blocks listed below
- Largest block
- /12
- smallest prefix length announced
- Registry
- APNIC
- ASN-TELSTRA
01 Ranges
Announced ranges
The blocks AS1221 advertises to the rest of the internet in this snapshot. A production routing table carries more — large carriers de-aggregate for traffic engineering — so treat the totals as a floor.
Matched in your browser against the 6 blocks below. Nothing is sent anywhere.
IPv4 — 5 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 1.120.0.0/13 | 1.120.0.0 | 1.127.255.255 | 524,288 |
| 49.176.0.0/12 | 49.176.0.0 | 49.191.255.255 | 1,048,576 |
| 58.160.0.0/12 | 58.160.0.0 | 58.175.255.255 | 1,048,576 |
| 139.130.0.0/16 | 139.130.0.0 | 139.130.255.255 | 65,536 |
| 203.36.0.0/14 | 203.36.0.0 | 203.39.255.255 | 262,144 |
IPv6 — 1 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 2001:8000::/20 | 2001:8000:: | 2001:8fff:ffff:ffff:ffff:ffff:ffff:ffff | 2^108 |