AS40156The Optimal Link Corporation
United StatesRegistryARINAs of 27th September 2026, AS40156 (The Optimal Link Corporation), a network registered in the United States with ARIN, originates 10 IPv4 prefixes covering 11k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 10,009th-largest of the 79,523 networks we see originating IPv4, and the 3,076th-largest of 18,427 in the United States. It is seen behind 2 upstream networks, most often AS3356 (Lumen (Level 3)) and AS174 (Cogent Communications, LLC), and in front of 2 downstream networks. 46% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS40156 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS40156 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
9
adjacent networks
- Upstreams
- 222%
- Peers
- 556%
- Downstreams
- 222%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS3356Lumen (Level 3) | US | Peer | 714 | 91 |
| AS174Cogent Communications, LLC | US | Peer | 482 | 61 |
Prefixes
The largest blocks AS40156 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 66.187.64.0/20 | 4.1k | 80/81 |
| 216.230.224.0/20 | 4.1k | 80/81 |
| 162.218.228.0/22 | 1k | 80/81 |
| 23.128.116.0/24 | 256 | 80/81 |
| 23.189.208.0/24 | 256 | 80/81 |
| 38.252.8.0/24 | 256 | 80/81 |
| 139.64.155.0/24 | 256 | 80/81 |
| 142.249.221.0/24 | 256 | 80/81 |
| 193.202.106.0/24 | 256 | 80/81 |
| 195.8.117.0/24 | 256 | 80/81 |
Routing health
How AS40156's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid46.2%6
- Invalid0.0%0
- No ROA53.8%7
Propagation
- Globally propagated90% of full-feed peers or more100.0%13
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 10 prefixes
IPv6 — 3 prefixes
- /324.3B × /6433.3%1
- /4865.5k × /6466.7%2
Recent changes
Announcements that started or stopped since 28th Aug 2026.
No announcement by AS40156 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.