AS21525Seattle Public Library
United StatesRegistryARINAt a glance
IPv4 prefixes
1
IPv6 prefixes
1
IPv4 addresses
4.1k
IPv6 /64s
65.5k
Upstream graph
The networks AS21525 is seen behind, one and two hops out, drawn from real AS paths.
AS21525Toward the internet core
Networks observed one and two hops upstream of AS21525 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
31
adjacent networks
- Upstreams
- 929%
- Peers
- 2271%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS6939Hurricane Electric LLC | US | Peer | 56 | 56 |
| AS6461Zayo Bandwidth | US | Peer | 39 | 39 |
| AS2914NTT America, Inc. | US | Peer | 39 | 39 |
| AS18106Viewqwest Pte Ltd |  SG | Peer | 2 | 2 |
| AS3130RGnet OU |  EE | Peer | 1 | 1 |
| AS24482SG.GS | SG | Peer | 1 | 1 |
| AS9002RETN Limited |  GB | Peer | 1 | 1 |
| AS58511Swoop (Anycast Global Backbone) |  AU | Peer | 1 | 1 |
| AS49544i3D.net B.V |  NL | Peer | 1 | 1 |
Prefixes
The largest blocks AS21525 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 66.212.64.0/20 | 4.1k | 79/80 |
| 2620:18::/48 | 65.5k × /64 | 62/62 |
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.