81.201.48.0/21
🇨🇿CIDR
81.201.48.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇨🇿 Czechia
City
Kladno
RIR
RIPENCC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.201.48.0/21 | AS8251NFX_ZSPO FreeTel, s.r.o. | Valid | RIPE | 5/30/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 81.201.48.0/21 | AS8251 | /21 | ripe |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.201.52.0/22 | 🇨🇿CZ | assigned | |
| 81.201.51.0/24 | 🇨🇿CZ | assigned | |
| 81.201.49.128/25 | 🇨🇿CZ | assigned | |
| 81.201.50.0/25 | 🇨🇿CZ | assigned | |
| 81.201.50.128/25 | 🇨🇿CZ | assigned | |
| 81.201.49.64/26 | 🇨🇿CZ | assigned | |
| 81.201.48.0/26 | 🇨🇿CZ | assigned | |
| 81.201.48.64/26 | 🇨🇿CZ | assigned | |
| 81.201.48.192/26 | 🇨🇿CZ | assigned | |
| 81.201.49.0/26 | 🇨🇿CZ | assigned | |
| 81.201.48.128/27 | 🇨🇿CZ | assigned | |
| 81.201.48.160/27 | 🇨🇿CZ | assigned |
Origin ASN
AS8251
NFX_ZSPO FreeTel, s.r.o.
Geolocation
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.201.48.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.201.48.0/21" | jq
External Links