AS27235COLORADO VALLEY COMMUNICATIONS, INC.
United StatesRegistryARINAs of 10th November 2026, AS27235 (COLORADO VALLEY COMMUNICATIONS, INC.), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 7.2k addresses. By IPv4 address space that makes it the 13,286th-largest of the 80,733 networks we see originating IPv4, and the 3,872nd-largest of 18,751 in the United States. It is seen behind 4 upstream networks, most often AS46849 (TEXAS LONE STAR NETWORK, LLC) and AS174 (Cogent Communications, LLC), and in front of 2 downstream networks. Every one of its announcements has 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 AS27235 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS27235 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
12
adjacent networks
- Upstreams
- 433%
- Peers
- 650%
- Downstreams
- 217%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS46849TEXAS LONE STAR NETWORK, LLC | US | Peer | 148 | 42 |
| AS174Cogent Communications, LLC | US | Peer | 54 | 25 |
| AS3356Lumen (Level 3) | US | Peer | 45 | 19 |
| AS14016Capcon Networks | US | Peer | 17 | 8 |
Prefixes
The largest blocks AS27235 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 66.220.128.0/20 | 4.1k | 76/76 |
| 65.120.0.0/21 | 2k | 76/76 |
| 65.119.48.0/22 | 1k | 76/76 |
Routing health
How AS27235'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
- Valid100.0%3
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more100.0%3
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 3 prefixes
Recent changes
Announcements that started or stopped since 12th Oct 2026.
- Withdrawn63.97.243.0/2428th Oct 2026
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.