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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.84.117.0/24 | 256 | ARIN |  US | 30th Oct 1990 |
| 192.84.118.0/24 | 256 | ARIN | US | 30th Oct 1990 |
| 192.84.119.0/24 | 256 | ARIN | US | 30th Oct 1990 |
| 192.84.126.0/24 | 256 | ARIN | US | 15th Jan 2015 |
| 192.84.159.0/24 | 256 | ARIN | US | 2nd Aug 2011 |
| 192.84.162.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.163.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.164.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.165.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.166.0/24 | 256 | RIPE NCC |  CH | 31st Oct 1990 |
| 192.84.167.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.169.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.170.0/24 | 256 | ARIN | US | 31st Oct 1990 |
| 192.84.172.0/24 | 256 | ARIN | US | 6th Nov 1990 |
| 192.84.173.0/24 | 256 | RIPE NCC |  GB | 6th Nov 1990 |
| 192.84.174.0/24 | 256 | ARIN | US | 6th Nov 1990 |
| 192.84.175.0/24 | 256 | ARIN | US | 20th Mar 2015 |
| 192.84.203.0/24 | 256 | RIPE NCC |  EU | 6th Nov 1990 |
| 192.84.209.0/24 | 256 | ARIN | US | 15th Jan 2015 |
| 192.84.210.0/24 | 256 | ARIN | US | 4th Aug 1993 |
| 192.84.211.0/24 | 256 | ARIN | US | 8th Nov 1990 |
| 192.84.212.0/24 | 256 | RIPE NCC | GB | 9th Nov 1990 |
| 192.84.213.0/24 | 256 | ARIN | US | 9th Nov 1990 |
| 192.84.214.0/24 | 256 | ARIN | US | 9th Nov 1990 |
| 192.84.22.0/24 | 256 | ARIN | US | 30th Jun 1990 |
| 192.84.220.0/24 | 256 | RIPE NCC |  DE | 12th Aug 1991 |
| 192.84.222.0/24 | 256 | ARIN | US | 12th Aug 1991 |
| 192.84.223.0/24 | 256 | ARIN | US | 12th Aug 1991 |
| 192.84.226.0/24 | 256 | RIPE NCC |  HU | 19th Aug 1991 |
| 192.84.227.0/24 | 256 | RIPE NCC | HU | 19th Aug 1991 |
| 192.84.228.0/24 | 256 | RIPE NCC | HU | 19th Aug 1991 |
| 192.84.229.0/24 | 256 | RIPE NCC | HU | 19th Aug 1991 |
| 192.84.233.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.234.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.235.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.239.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.240.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.244.0/24 | 256 | AFRINIC |  ZA | 12th Nov 1990 |
| 192.84.245.0/24 | 256 | RIPE NCC | DE | 12th Nov 1990 |
| 192.84.246.0/24 | 256 | RIPE NCC | DE | 12th Nov 1990 |
| 192.84.247.0/24 | 256 | RIPE NCC | DE | 12th Nov 1990 |
| 192.84.248.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.249.0/24 | 256 | ARIN | US | 13th Feb 2017 |
| 192.84.25.0/24 | 256 | ARIN | US | 23rd Oct 1990 |
| 192.84.250.0/24 | 256 | ARIN | US | 12th Nov 1990 |
| 192.84.251.0/24 | 256 | ARIN | US | 13th Nov 1990 |
| 192.84.26.0/24 | 256 | ARIN | US | 23rd Oct 1990 |
| 192.84.27.0/24 | 256 | RIPE NCC |  AT | 23rd Oct 1990 |
| 192.84.28.0/24 | 256 | ARIN | US | 23rd Oct 1990 |
| 192.84.29.0/24 | 256 | ARIN | US | 23rd Oct 1990 |