81.91.80.0/20
🇨🇿CIDR
81.91.80.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇨🇿 Czech Republic
RIR
RIPENCC
Status
allocated
Allocated
4/25/2006
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.91.80.0/20 | AS39790WEB4U Web4U s.r.o. | Valid | RIPE | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.91.80.0/21 | AS39790WEB4U Web4U s.r.o. | Valid | — | 5/31/2026 |
| 81.91.88.0/21 | AS39790WEB4U Web4U s.r.o. | Valid | — | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 81.91.80.0/20 | AS39790 | /21 | ripe |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS39790 | RIPE | MNT-WEB4U | 4/18/2007 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.91.86.0/23 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.90.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.94.0/24 | 🇨🇿CZ | assigned | |
| 81.91.93.0/24 | 🇨🇿CZ | assigned | |
| 81.91.89.0/24 | 🇨🇿CZ | assigned | |
| 81.91.92.0/24 | 🇨🇿CZ | assigned | |
| 81.91.88.0/24 | 🇨🇿CZ | assigned | |
| 81.91.91.0/24 | 🇨🇿CZ | assigned | |
| 81.91.83.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.82.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.84.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.85.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.81.0/24 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.95.128/25 | 🇨🇿CZ | assigned | |
| 81.91.80.128/25 | 🇨🇿CZ | assigned | |
| 81.91.95.64/26 | 🇨🇿CZ | assigned | |
| 81.91.80.0/26 | AS39790 | 🇨🇿CZ | assigned |
| 81.91.95.0/26 | 🇨🇿CZ | assigned | |
| 81.91.80.96/27 | 🇨🇿CZ | assigned | |
| 81.91.80.64/27 | 🇨🇿CZ | assigned |
Origin ASN
AS39790
WEB4U Web4U s.r.o.
Geolocation
Country🇨🇿Czech RepublicCZ
Coordinates49.8175, 15.4730 ↗
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.91.80.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.91.80.0/20" | jq
External Links