AS51904Shchurov Mikhail Yurievich
RussiaRegistryRIPE NCCTypeEyeballAs of 10th November 2026, AS51904 (Shchurov Mikhail Yurievich), an access network registered in Russia with RIPE NCC, originates 2 IPv4 prefixes covering 2k addresses. By IPv4 address space that makes it the 25,845th-largest of the 80,723 networks we see originating IPv4, and the 1,479th-largest of 4,983 in Russia. It is seen behind 9 upstream networks, most often AS35598 (INETCOM CARRIER LLC) and AS57304 (RETN Russia), and in front of 3 downstream networks. None of its announcements have a valid RPKI ROA. 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 AS51904 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS51904 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
33
adjacent networks
- Upstreams
- 927%
- Peers
- 2164%
- Downstreams
- 39%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS35598INETCOM CARRIER LLC | RU | Peer | 130 | 42 |
| AS57304RETN Russia | RU | Peer | 73 | 26 |
| AS8641LLC "Nauka-Svyaz" | RU | Peer | 71 | 31 |
| AS62255BiMajLink d.o.o. |  SI | Peer | 8 | 5 |
| AS24482SG.GS |  SG | Peer | 5 | 2 |
| AS32590Valve Corporation |  US | Peer | 3 | 1 |
| AS25091IP-Max SA |  CH | Peer | 3 | 1 |
| AS24940Hetzner Online GmbH |  DE | Peer | 3 | 1 |
| AS49544i3D.net B.V |  NL | Peer | 3 | 1 |
Prefixes
The largest blocks AS51904 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 91.132.104.0/22 | 1k | 76/76 |
| 193.41.76.0/22 | 1k | 76/76 |
Routing health
How AS51904'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%2
Propagation
- Globally propagated90% of full-feed peers or more100.0%2
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 2 prefixes
Recent changes
Announcements that started or stopped since 11th Oct 2026.
No announcement by AS51904 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.