81.0.0.0/16
39 assigned ranges in this /16.
/24 breakdown
| Block | Top country | Countries | ASNs | Ranges |
|---|---|---|---|---|
| 81.0.0.0/24 | Spain (100%) | 1 | 1 | 1 |
| 81.0.32.0/24 | Spain (100%) | 1 | 1 | 1 |
| 81.0.64.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.82.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.88.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.90.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.96.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.98.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.100.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.105.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.108.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.110.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.122.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.124.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.126.0/24 | Hungary (100%) | 1 | 1 | 1 |
| 81.0.128.0/24 | Norway (100%) | 1 | 1 | 1 |
| 81.0.192.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.196.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.199.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.200.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.206.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.210.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.212.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.215.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.217.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.218.0/24 | Germany (100%) | 1 | 1 | 1 |
| 81.0.222.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.225.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.227.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.228.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.229.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.230.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.231.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.242.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.244.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.246.0/24 | Germany (100%) | 1 | 1 | 1 |
| 81.0.250.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.251.0/24 | Czechia (100%) | 1 | 1 | 1 |
| 81.0.254.0/24 | Czechia (100%) | 1 | 1 | 1 |
Assigned ranges
| Range | ASN | Org | Country |
|---|---|---|---|
81.0.0.0 – 81.0.31.255 | AS15704 | XTRA TELECOM S.A. | ES |
81.0.32.0 – 81.0.63.255 | AS15704 | XTRA TELECOM S.A. | ES |
81.0.64.0 – 81.0.81.255 | AS12301 | One Hungary Ltd. | HU |
81.0.82.0 – 81.0.87.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
81.0.88.0 – 81.0.89.255 | AS12301 | One Hungary Ltd. | HU |
81.0.90.0 – 81.0.95.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
81.0.96.0 – 81.0.97.255 | AS12301 | One Hungary Ltd. | HU |
81.0.98.0 – 81.0.99.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
81.0.100.0 – 81.0.104.255 | AS12301 | One Hungary Ltd. | HU |
81.0.105.0 – 81.0.107.255 | AS12301 | One Hungary Ltd. | HU |
81.0.108.0 – 81.0.109.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
81.0.110.0 – 81.0.121.255 | AS12301 | One Hungary Ltd. | HU |
81.0.122.0 – 81.0.123.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
81.0.124.0 – 81.0.125.255 | AS12301 | One Hungary Ltd. | HU |
81.0.126.0 – 81.0.127.255 | AS20845 | 2Connect Telecommunications Infrastructure & Network Services Ltd. | HU |
24 more ranges in this block.