CTK
BGP inherited
Cluster stats
| Netblocks | 6 · 10,507 IPv4 addresses |
| Registered in | Japan (3) · Germany (1) · SI (1) |
| All fragments | 19 blocks across 14 clusters |
| Cluster ID | 208841590 |
| Registry | APNIC |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 7 shared RIR contact/maintainer handles |
| Registry names | 3 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
3 weekly snapshots · JSON
6
0 netblocks since 2026-07-12
2026-07-12
peak 6
2026-07-19
IP Ranges (6)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 85.10.222.224/28 | CTK-GMBH | RIPE | ASSIGNED PA | ● low |
| 125.2.208.0/20 | CTK | APNIC | ALLOCATED PORTABLE | ● low |
| 193.2.9.0/24 | CTK-NET | RIPE | ASSIGNED PA | ● low |
| 203.104.112.0/20 | CTK | APNIC | ALLOCATED PORTABLE | ● low |
| 203.110.224.0/21 | CTK | APNIC | ALLOCATED PORTABLE | ● low |
| 2a01:4f8:d1:3800::/56 | CTK-GMBH | RIPE | ASSIGNED | ● low |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
100.0%
of checked blocks have valid RPKI ROA coverage
(6 of 6)
Possible discrepancies (4)
These blocks are registered to CTK but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 203.104.112.0/20 /20 | authorized for AS17936 — Cable Television Kani Co.,Ltd. |
| 125.2.208.0/20 /20 | authorized for AS17936 — Cable Television Kani Co.,Ltd. |
| 203.110.224.0/21 /21 | authorized for AS17936 — Cable Television Kani Co.,Ltd. |
| 193.2.9.0/24 /24 | authorized for AS2107 — ARNES |
NIC Handles
ARNES-MNT
DUMY-RIPE
DUMY-RIPE
HOS-GUN
JNIC1-AP
JNIC1-AP
MAINT-JPNIC