AS203645 Jan Ryznar 🇨🇿 CZ
Announcing 27 prefixes, seen at the RIS collectors.
IPv4 prefixes
4
1,024 (4 × /24)
IPv6 prefixes
23
3,593 × /48
Upstreams
1
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it
Registry and operator data
- AS number
- AS203645
- Name
- Jan Ryznar
- Organisation
- Jan Ryznar
- Country
- 🇨🇿 CZ
- RIR
- RIPENCC
- Allocated
- 2016-01-07
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
4 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 185.133.188.0/24 v4 | no ROA | 42 | 3454928725203645 | 2026-09-18 |
| 185.133.189.0/24 v4 | no ROA | 42 | 3454928725203645 | 2026-09-18 |
| 185.133.190.0/24 v4 | no ROA | 42 | 3454928725203645 | 2026-09-18 |
| 185.133.191.0/24 v4 | no ROA | 42 | 3454928725203645 | 2026-09-18 |