Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,124 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.112.89.0/24 | 256 | ARIN |  US | 7th Aug 1991 |
| 192.112.90.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.91.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.92.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.93.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.94.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.95.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.96.0/24 | 256 | ARIN | US | 7th Aug 1991 |
| 192.112.98.0/24 | 256 | RIPE NCC |  GB | 7th Aug 1991 |
| 192.112.99.0/24 | 256 | RIPE NCC |  DK | 7th Aug 1991 |
| 192.114.10.0/24 | 256 | RIPE NCC |  IL | 1st Sept 1993 |
| 192.114.12.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.114.152.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.114.24.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.114.32.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.114.62.0/23 | 512 | RIPE NCC | IL | 1st Sept 1993 |
| 192.114.8.0/23 | 512 | RIPE NCC | IL | 1st Sept 1993 |
| 192.115.108.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.115.12.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.115.244.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.115.48.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.115.68.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.117.192.0/19 | 8.2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.117.224.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.117.64.0/20 | 4.1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.104.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.120.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.128.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.132.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.136.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.144.0/20 | 4.1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.160.0/19 | 8.2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.192.0/18 | 16.4k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.4.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.40.0/21 | 2k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.52.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.118.56.0/22 | 1k | RIPE NCC | IL | 1st Sept 1993 |
| 192.119.0.0/24 | 256 | ARIN | US | 24th Oct 2018 |
| 192.119.1.0/24 | 256 | ARIN | US | 30th Jul 1991 |
| 192.119.135.0/24 | 256 | ARIN | US | 3rd Jan 1995 |
| 192.119.160.0/21 | 2k | ARIN |  CA | 5th Aug 2026 |
| 192.12.1.0/24 | 256 | RIPE NCC | GB | 12th Nov 1987 |
| 192.12.101.0/24 | 256 | ARIN | US | 28th Aug 1985 |
| 192.12.102.0/24 | 256 | ARIN | US | 4th Sept 1985 |
| 192.12.116.0/24 | 256 | AFRINIC |  BF | 25th Jun 2018 |
| 192.12.119.0/24 | 256 | ARIN | US | 7th Jul 2022 |
| 192.12.120.0/24 | 256 | ARIN | US | 4th Sept 1985 |
| 192.12.121.0/24 | 256 | ARIN | US | 18th Sept 1985 |
| 192.12.122.0/24 | 256 | ARIN | US | 18th Sept 1985 |
| 192.12.123.0/24 | 256 | ARIN | US | 20th Sept 1985 |