81.25.16.0/21
🇨🇿CIDR
81.25.16.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇨🇿 Czechia
City
Prague
RIR
RIPENCC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.25.16.0/21 | AS57728CEZNET-AS CEZNET s.r.o. | Valid | RIPE | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 81.25.16.0/21 | AS57728 | /21 | ripe |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS57728 | RIPE | CEZNET-MNT | 9/16/2025 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.25.16.0/22 | 🇨🇿CZ | assigned | |
| 81.25.20.0/24 | 🇨🇿CZ | assigned | |
| 81.25.21.0/24 | 🇨🇿CZ | assigned | |
| 81.25.22.16/28 | 🇨🇿CZ | assigned |
Origin ASN
AS57728
CEZNET-AS CEZNET s.r.o.
Geolocation
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.25.16.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.25.16.0/21" | jq
External Links