81.23.240.0/23
🇳🇱CIDR
81.23.240.0/23
IP Version
IPv4
Addresses
512
Mask
/23 (255.255.254.0)
Country
🇳🇱 The Netherlands
City
Amsterdam
RIR
RIPENCC
Status
allocated
Allocated
11/5/2002
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.23.240.0/23 | AS61429AS-CASTOR Castor Communications BV | Valid | RIPE | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 81.23.240.0/23 | AS61429 | /23 | ripe |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS61429 | RIPE | castor-mnt | 8/12/2025 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.23.241.0/24 | 🇳🇱NL | assigned | |
| 81.23.240.0/24 | 🇳🇱NL | assigned |
Geolocation
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.23.240.0/23Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.23.240.0/23" | jq
External Links