81.17.240.0/20
🇮🇪CIDR
81.17.240.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇮🇪 Ireland
City
Dublin
RIR
RIPENCC
Status
allocated
Allocated
12/16/2005
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.17.240.0/20 | AS39122BLACKNIGHT-AS Blacknight Internet Solutions Limited | Valid | RIPE | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 81.17.240.0/24 | AS39122BLACKNIGHT-AS Blacknight Internet Solutions Limited | Valid | — | 5/31/2026 |
| 81.17.242.0/24 | AS39122BLACKNIGHT-AS Blacknight Internet Solutions Limited | Valid | — | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 81.17.240.0/20 | AS39122 | /24 | ripe |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS39122 | RIPE | MNT-BLACKNIGHT | 3/9/2006 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 81.17.254.0/23 | 🇮🇪IE | assigned | |
| 81.17.244.0/23 | 🇮🇪IE | assigned | |
| 81.17.250.0/23 | 🇮🇪IE | assigned | |
| 81.17.253.0/24 | 🇮🇪IE | assigned | |
| 81.17.252.0/24 | 🇮🇪IE | assigned | |
| 81.17.247.0/24 | 🇮🇪IE | assigned | |
| 81.17.249.0/24 | 🇮🇪IE | assigned | |
| 81.17.240.0/24 | AS39122 | 🇮🇪IE | assigned |
| 81.17.241.0/24 | 🇮🇪IE | assigned | |
| 81.17.243.128/25 | 🇮🇪IE | assigned | |
| 81.17.248.128/25 | 🇮🇪IE | assigned | |
| 81.17.248.0/25 | 🇮🇪IE | assigned | |
| 81.17.243.0/26 | 🇮🇪IE | assigned | |
| 81.17.242.128/27 | 🇮🇪IE | assigned | |
| 81.17.243.64/27 | 🇮🇪IE | assigned | |
| 81.17.246.192/27 | 🇮🇪IE | assigned | |
| 81.17.246.224/27 | 🇮🇪IE | assigned | |
| 81.17.246.0/27 | 🇮🇪IE | assigned | |
| 81.17.243.96/27 | 🇮🇪IE | assigned | |
| 81.17.246.144/28 | 🇮🇪IE | assigned | |
| 81.17.246.176/28 | 🇮🇪IE | assigned | |
| 81.17.246.64/28 | 🇮🇪IE | assigned | |
| 81.17.242.64/28 | 🇮🇪IE | assigned | |
| 81.17.246.80/28 | 🇮🇪IE | assigned | |
| 81.17.242.112/28 | 🇮🇪IE | assigned | |
| 81.17.246.32/28 | 🇮🇪IE | assigned | |
| 81.17.242.160/28 | 🇮🇪IE | assigned | |
| 81.17.242.208/28 | 🇮🇪IE | assigned | |
| 81.17.242.0/28 | 🇮🇪IE | assigned | |
| 81.17.242.160/29 | 🇮🇪IE | assigned | |
| 81.17.242.24/29 | 🇮🇪IE | assigned | |
| 81.17.242.96/29 | 🇮🇪IE | assigned | |
| 81.17.242.192/29 | 🇮🇪IE | assigned | |
| 81.17.246.112/29 | 🇮🇪IE | assigned | |
| 81.17.246.120/29 | 🇮🇪IE | assigned | |
| 81.17.242.32/29 | 🇮🇪IE | assigned | |
| 81.17.242.48/29 | 🇮🇪IE | assigned | |
| 81.17.242.80/29 | 🇮🇪IE | assigned | |
| 81.17.242.168/29 | 🇮🇪IE | assigned | |
| 81.17.242.176/29 | 🇮🇪IE | assigned | |
| 81.17.246.48/29 | 🇮🇪IE | assigned | |
| 81.17.246.168/29 | 🇮🇪IE | assigned | |
| 81.17.242.88/29 | 🇮🇪IE | assigned | |
| 81.17.242.104/29 | 🇮🇪IE | assigned | |
| 81.17.242.184/29 | 🇮🇪IE | assigned | |
| 81.17.242.248/29 | 🇮🇪IE | assigned | |
| 81.17.246.128/29 | 🇮🇪IE | assigned | |
| 81.17.246.160/29 | 🇮🇪IE | assigned | |
| 81.17.242.40/29 | 🇮🇪IE | assigned | |
| 81.17.242.200/29 | 🇮🇪IE | assigned | |
| 81.17.246.56/29 | 🇮🇪IE | assigned |
Geolocation
Country🇮🇪IrelandIE
CityDublin
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/81.17.240.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/81.17.240.0/20" | jq
External Links