AS25500User Association of Ukrainian Research and Academic Network URAN
UkraineRegistryRIPE NCCTypeEyeballAs of 26th September 2026, AS25500 (User Association of Ukrainian Research…), an access network registered in Ukraine with RIPE NCC, originates 12 IPv4 prefixes covering 21.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 6,707th-largest of the 79,516 networks we see originating IPv4, and the 57th-largest of 1,521 in Ukraine. It is seen behind 4 upstream networks, most often AS12687 (User Association of Ukrainian Research…) and AS3326 (Datagroup PJSC). 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 AS25500 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS25500 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
- 431%
- Peers
- 969%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS12687User Association of Ukrainian Research and Academic Network URAN | UA | Peer | 734 | 63 |
| AS3326Datagroup PJSC | UA | Peer | 242 | 77 |
| AS6939Hurricane Electric LLC |  US | Peer | 48 | 4 |
| AS49544i3D.net B.V |  NL | Peer | 12 | 1 |
Prefixes
The largest blocks AS25500 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 77.47.160.0/20 | 4.1k | 81/81 |
| 77.47.192.0/20 | 4.1k | 81/81 |
| 77.47.224.0/20 | 4.1k | 81/81 |
| 77.47.128.0/21 | 2k | 81/81 |
| 77.47.184.0/21 | 2k | 81/81 |
| 77.47.216.0/21 | 2k | 81/81 |
| 77.47.136.0/22 | 1k | 81/81 |
| 77.47.140.0/23 | 512 | 81/81 |
| 77.47.176.0/23 | 512 | 81/81 |
| 77.47.208.0/23 | 512 | 81/81 |
Routing health
How AS25500'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%13
- Invalid0.0%0
- No ROA0.0%0
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 — 12 prefixes
IPv6 — 1 prefixes
- /324.3B × /64100.0%1
Recent changes
Announcements that started or stopped since 28th Aug 2026.
No announcement by AS25500 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.