AS204949CMIS s.r.o.
CzechiaRegistryRIPE NCCAs of 10th November 2026, AS204949 (CMIS s.r.o.), a network registered in Czechia with RIPE NCC, originates 7 IPv4 prefixes covering 2.6k addresses. By IPv4 address space that makes it the 23,457th-largest of the 80,733 networks we see originating IPv4, and the 193rd-largest of 576 in Czechia. It is seen behind 8 upstream networks, most often AS29208 (Quantcom, a.s.) and AS39392 (SH.cz s.r.o.). 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 AS204949 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS204949 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
41
adjacent networks
- Upstreams
- 820%
- Peers
- 3380%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS29208Quantcom, a.s. | CZ | Peer | 238 | 34 |
| AS39392SH.cz s.r.o. | CZ | Peer | 203 | 29 |
| AS6939Hurricane Electric LLC |  US | Peer | 42 | 6 |
| AS24482SG.GS |  SG | Peer | 14 | 2 |
| AS32590Valve Corporation | US | Peer | 7 | 1 |
| AS24940Hetzner Online GmbH |  DE | Peer | 7 | 1 |
| AS132337Axclusive | SG | Adjacent | 7 | 1 |
| AS49544i3D.net B.V |  NL | Peer | 7 | 1 |
Prefixes
The largest blocks AS204949 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 185.219.168.0/22 | 1k | 75/76 |
| 89.23.125.0/24 | 256 | 75/76 |
| 91.220.20.0/24 | 256 | 75/76 |
| 91.241.77.0/24 | 256 | 75/76 |
| 176.53.145.0/24 | 256 | 75/76 |
| 185.193.243.0/24 | 256 | 75/76 |
| 213.134.10.0/24 | 256 | 75/76 |
Routing health
How AS204949'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%7
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more100.0%7
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 7 prefixes
Recent changes
Announcements that started or stopped since 11th Oct 2026.
No announcement by AS204949 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.