Uniwersytet Jana Dlugosza w Czestochowie
Data as of 2026-10-04
BGP inherited
This organisation
| Netblocks | 4 · 1,536 IPv4 addresses |
| Record ID | 245909263 |
| Registry | RIPE |
| Customers | see who runs inside 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 · report an issue | |
IP Ranges (4)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 212.87.234.0 – 212.87.236.255 | Uniwersytet Jana Dlugosza w Czestochowie | RIPE | ASSIGNED PA | ● high |
| 212.87.239.0/24 | Uniwersytet Jana Dlugosza w Czestochowie | RIPE | ASSIGNED PA | ● high |
| 212.87.251.0/24 | Uniwersytet Jana Dlugosza w Czestochowie | RIPE | ASSIGNED PA | ● high |
| 212.87.253.0/24 | Uniwersytet Jana Dlugosza w Czestochowie | RIPE | ASSIGNED PA | ● high |
Network trust
what's this?
RPKI hygiene: C
how networks compare →
75.0%
of checked blocks have valid RPKI ROA coverage
(3 of 4)
Possible discrepancies (3)
These blocks are registered to Uniwersytet Jana Dlugosza w Czestochowie 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.
| 212.87.239.0/24 /24 | authorized for AS15373 — Politechnika Czestochowska |
| 212.87.253.0/24 /24 | authorized for AS15373 — Politechnika Czestochowska |
| 212.87.251.0/24 /24 | authorized for AS15373 — Politechnika Czestochowska |
NIC Handles
DUMY-RIPE
DUMY-RIPE
ORG-AJD1-RIPE
PL-CZESTMAN-MNT