AS81MCNC
United StatesRegistryARINTypeCarrierAt a glance
IPv4 prefixes
135
IPv6 prefixes
4
IPv4 addresses
2.1M
IPv6 /64s
73B
Upstream graph
The networks AS81 is seen behind, one and two hops out, drawn from real AS paths.
AS81Toward the internet core
Networks observed one and two hops upstream of AS81 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
89
adjacent networks
- Upstreams
- 78%
- Peers
- 4551%
- Downstreams
- 3742%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS3356Lumen (Level 3) | US | Peer | 8,709 | 142 |
| AS174Cogent Communications, LLC | US | Peer | 8,338 | 136 |
| AS11426Charter Communications Inc | US | Peer | 2,139 | 74 |
| AS7018AT&T Enterprises, LLC | US | Peer | 647 | 90 |
| AS11537Internet2 | US | Peer | 396 | 2 |
| AS11164Internet2 I2PX | US | Peer | 249 | 22 |
| AS6461Zayo Bandwidth | US | Peer | 68 | 38 |
Prefixes
All 139The largest blocks AS81 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 204.84.0.0/15 | 131k | 79/80 |
| 128.109.0.0/16 | 65.5k | 79/80 |
| 152.4.0.0/16 | 65.5k | 80/80 |
| 152.6.0.0/16 | 65.5k | 80/80 |
| 152.8.0.0/16 | 65.5k | 79/80 |
| 152.9.0.0/16 | 65.5k | 80/80 |
| 152.10.0.0/16 | 65.5k | 79/80 |
| 152.11.0.0/16 | 65.5k | 79/80 |
| 152.12.0.0/16 | 65.5k | 80/80 |
| 152.18.0.0/16 | 65.5k | 80/80 |
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.