AS20545Georgian Research and Educational Networking Association (GRENA)
GeorgiaRegistryRIPE NCCTypeEyeballAs of 11th November 2026, AS20545 (Georgian Research and Educational…), an access network registered in Georgia with RIPE NCC, originates 21 IPv4 prefixes covering 11k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 10,168th-largest of the 80,747 networks we see originating IPv4, and the 12th-largest of 150 in Georgia. It is seen behind 3 upstream networks, most often AS174 (Cogent Communications, LLC) and AS20965 (GEANT Vereniging), and in front of 3 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 91% 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 AS20545 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS20545 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
13
adjacent networks
- Upstreams
- 323%
- Peers
- 754%
- Downstreams
- 323%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS174Cogent Communications, LLC |  US | Peer | 1,665 | 131 |
| AS20965GEANT Vereniging |  NL | Peer | 38 | 2 |
| AS35805JSC "Silknet" | GE | Peer | 14 | 14 |
Prefixes
The largest blocks AS20545 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 217.147.224.0/20 | 4.1k | 2/76 |
| 109.205.40.0/22 | 1k | 75/76 |
| 185.212.252.0/22 | 1k | 75/76 |
| 217.147.230.0/23 | 512 | 75/76 |
| 109.205.44.0/24 | 256 | 75/76 |
| 217.147.224.0/24 | 256 | 75/76 |
| 217.147.225.0/24 | 256 | 75/76 |
| 217.147.226.0/24 | 256 | 75/76 |
| 217.147.227.0/24 | 256 | 75/76 |
| 217.147.228.0/24 | 256 | 75/76 |
Routing health
How AS20545'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%22
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more90.9%20
- Partially propagated40% to 90%4.5%1
- Seen by few peersUnder 40%4.5%1
Prefix sizes
IPv4 — 21 prefixes
IPv6 — 1 prefixes
- /2934.4B × /64100.0%1
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS20545 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.