AS1221Telstra Limited
AustraliaRegistryAPNICTypeEyeballAt a glance
IPv4 prefixes
282
IPv6 prefixes
2
IPv4 addresses
13.4M
IPv6 /64s
17.6T
Upstream graph
The networks AS1221 is seen behind, one and two hops out, drawn from real AS paths.
AS1221Toward the internet core
Networks observed one and two hops upstream of AS1221 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
603
adjacent networks
- Upstreams
- 71%
- Peers
- 30851%
- Downstreams
- 28848%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS4637Telstra International Limited |  HK | Peer | 162,718 | 138 |
| AS58511Swoop (Anycast Global Backbone) | AU | Peer | 23,310 | 2 |
| AS38880Micron21 Datacentre Pty Ltd | AU | Peer | 14,742 | 3 |
| AS7545TPG Telecom Limited | AU | Peer | 6 | 3 |
| AS17559Spectrums Core Network | AU | Peer | 2 | 2 |
| AS10026Telstra Global Internet Services Network Blocks |  JP | Peer | 2 | 1 |
| AS4826Vocus Connect International Backbone | AU | Peer | 1 | 1 |
Prefixes
All 284The largest blocks AS1221 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 1.128.0.0/11 | 2.1M | 78/80 |
| 101.160.0.0/11 | 2.1M | 77/80 |
| 58.160.0.0/12 | 1M | 77/80 |
| 121.208.0.0/12 | 1M | 78/80 |
| 124.176.0.0/12 | 1M | 77/80 |
| 1.120.0.0/13 | 524k | 77/80 |
| 60.224.0.0/13 | 524k | 78/80 |
| 110.144.0.0/13 | 524k | 78/80 |
| 120.144.0.0/13 | 524k | 78/80 |
| 203.40.0.0/13 | 524k | 78/80 |
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.