Jan Ryznar
BGP inherited
Cluster stats
| Netblocks | 30 · 6,138 IPv4 addresses |
| Cluster ID | 210548652 |
| Registry | BGP |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 9 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
32
0 netblocks since 2026-07-05
2026-07-05
peak 32
2026-07-19
IP Ranges (30)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 85.163.224.0/20 | Jan Ryznar | RIPE | ASSIGNED PA | ● high |
| 185.133.188.0/24 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 185.133.189.0/24 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 185.133.190.0/24 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 185.133.191.0/24 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:100::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:101::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:200::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:201::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:300::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:300::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:302::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:500::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:700::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:a00::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:a01::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:c00::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:e00::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:1000::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:1200::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:1201::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:2000::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:2011::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:2300::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:2311::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:7d20::/48 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:fe00::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 2a01:7d20:ff00::/40 | Jan Ryznar | BGP | ANNOUNCED | ● high |
| 185.133.188.0/22 | Jan Ryznar | RIPE | ALLOCATED PA | ● low |
| 2a01:7d20::/32 | Jan Ryznar | RIPE | ALLOCATED-BY-RIR | ● low |
Network trust
what's this?
RPKI hygiene: F
how networks compare →
3.3%
of checked blocks have valid RPKI ROA coverage
(1 of 30)
Possible discrepancies (1)
These blocks are registered to Jan Ryznar but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 85.163.224.0/20 /20 | authorized for AS28725 — CETIN a.s. |
NIC Handles
AR63479-RIPE
AS203645
CETIN-MNT2
DUMY-RIPE
DUMY-RIPE
ORG-JR41-RIPE
ORG-JR75-RIPE
RIPE-NCC-HM-MNT
cz-rpsnet-1-mnt