81.90.168.0/21
🇨🇿CIDR
81.90.168.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇨🇿 Czechia
City
Litvínovice
RIR
RIPENCC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.90.168.0/21 | AS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | Valid | RIPE | 5/31/2026 |
Covering Prefix
4 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.90.160.0/20 | AS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | Valid | — | 5/31/2026 |
| 81.90.168.0/24 | AS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | Valid | — | 5/31/2026 |
| 81.90.170.0/24 | AS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | Valid | — | 5/31/2026 |
| 81.90.173.0/24 | AS5610O2-CZECH-REPUBLIC O2 Czech Republic, a.s. | Valid | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS5610 | RIPE | AS5610-MTN | 8/31/2025 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.90.175.0/24 | 🇨🇿CZ | assigned | |
| 81.90.169.0/24 | 🇨🇿CZ | assigned | |
| 81.90.172.0/24 | 🇨🇿CZ | assigned | |
| 81.90.168.0/24 | AS5610 | 🇨🇿CZ | assigned |
| 81.90.171.0/24 | 🇨🇿CZ | assigned | |
| 81.90.174.0/24 | 🇨🇿CZ | assigned | |
| 81.90.173.0/25 | 🇨🇿CZ | assigned | |
| 81.90.173.128/26 | 🇨🇿CZ | assigned | |
| 81.90.170.0/26 | 🇨🇿CZ | assigned | |
| 81.90.170.64/26 | 🇨🇿CZ | assigned | |
| 81.90.173.192/26 | 🇨🇿CZ | assigned |
Geolocation
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.90.168.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.90.168.0/21" | jq
External Links