BIELMAN
BGP inherited
Cluster stats
| Netblocks | 8 · 2,306 IPv4 addresses |
| Cluster ID | 209321939 |
| Registry | RIPE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 4 shared RIR contact/maintainer handles |
| Registry names | 1 distinct registrant name across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
8
0 netblocks since 2026-07-05
2026-07-05
peak 8
2026-07-19
IP Ranges (8)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 83.230.99.0/24 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 83.230.118.0/23 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 83.230.127.220/30 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 212.106.141.0/24 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 212.106.159.212/30 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 212.106.183.0 – 212.106.187.255 | BIELMAN | RIPE | ASSIGNED PA | ● high |
| 2a01:1dd::1:3a/127 | BIELMAN | RIPE | ASSIGNED | ● high |
| 2a01:1dd::1:3c/127 | BIELMAN | RIPE | ASSIGNED | ● high |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
100.0%
of checked blocks have valid RPKI ROA coverage
(8 of 8)
Possible discrepancies (4)
These blocks are registered to BIELMAN 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.
| 212.106.183.0 – 212.106.187.255 /22 | authorized for AS8508 — Silesian University of Technology, Computer Centre |
| 83.230.118.0/23 /23 | authorized for AS8508 — Silesian University of Technology, Computer Centre |
| 212.106.141.0/24 /24 | authorized for AS15744 — Silesian University of Technology, Computer Centre |
| 83.230.99.0/24 /24 | authorized for AS8508 — Silesian University of Technology, Computer Centre |
NIC Handles
AT10986-RIPE
DUMY-RIPE
DUMY-RIPE
PL-CKPOLSL-MNT