AS51528KOZOBROD ANDRIY ANATOLIYOVICH
UkraineRegistryRIPE NCCTypeEyeballAs of 23rd October 2026, AS51528 (KOZOBROD ANDRIY ANATOLIYOVICH), an access network registered in Ukraine with RIPE NCC, originates 3 IPv4 prefixes covering 2k addresses. By IPv4 address space that makes it the 25,336th-largest of the 79,659 networks we see originating IPv4, and the 362nd-largest of 1,521 in Ukraine. It is seen behind 9 upstream networks, most often AS9002 (RETN Limited) and AS6939 (Hurricane Electric LLC), and in front of 4 downstream networks. None of its announcements have a valid RPKI ROA. 33% 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 AS51528 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS51528 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
40
adjacent networks
- Upstreams
- 923%
- Peers
- 2768%
- Downstreams
- 410%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS9002RETN Limited |  GB | Peer | 227 | 70 |
| AS6939Hurricane Electric LLC |  US | Peer | 20 | 8 |
| AS56386LLC "GREEN-NET" | UA | Peer | 12 | 12 |
| AS24482SG.GS |  SG | Peer | 7 | 3 |
| AS50581Ukrainian Telecommunication Group LLC | UA | Peer | 7 | 2 |
| AS132337Axclusive | SG | Peer | 3 | 1 |
| AS24940Hetzner Online GmbH |  DE | Peer | 3 | 1 |
| AS262355VSX Networks |  BR | Peer | 2 | 1 |
| AS22356Durand do Brasil Ltda | BR | Peer | 2 | 1 |
Prefixes
The largest blocks AS51528 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 91.219.52.0/22 | 1k | 77/77 |
| 91.219.52.0/23 | 512 | 17/77 |
| 91.219.54.0/23 | 512 | 17/77 |
Routing health
How AS51528'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
- Valid0.0%0
- Invalid0.0%0
- No ROA100.0%3
Propagation
- Globally propagated90% of full-feed peers or more33.3%1
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%66.7%2
Prefix sizes
IPv4 — 3 prefixes
Recent changes
Announcements that started or stopped since 23rd Sept 2026.
No announcement by AS51528 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.