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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 41.223.0.0/22 | 1k | AFRINIC |  CI | 28th Feb 2020 |
| 41.223.12.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.223.188.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.223.208.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.223.40.0/22 | 1k | AFRINIC |  AO | 11th Jul 2006 |
| 41.223.68.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.240.0.0/15 | 131k | AFRINIC |  SD | 11th Jul 2013 |
| 41.242.132.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.242.176.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.245.0.0/18 | 16.4k | AFRINIC | CI | 28th Feb 2020 |
| 41.245.112.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.245.64.0/19 | 8.2k | AFRINIC | CI | 28th Feb 2020 |
| 41.245.96.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.63.64.0/18 | 16.4k | AFRINIC |  ZA | 15th Nov 2010 |
| 41.67.0.0/18 | 16.4k | AFRINIC | SD | 7th Apr 2010 |
| 41.67.64.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.67.88.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 41.67.96.0/19 | 8.2k | AFRINIC | CI | 28th Feb 2020 |
| 41.72.160.0/19 | 8.2k | AFRINIC |  KE | 2nd Dec 2009 |
| 41.73.16.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.74.96.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.75.16.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.75.32.0/20 | 4.1k | AFRINIC | CI | 28th Feb 2020 |
| 41.76.160.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 41.76.184.0/21 | 2k | AFRINIC | KE | 1st Jul 2010 |
| 41.76.232.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 41.76.72.0/21 | 2k | AFRINIC |  NG | 15th Apr 2010 |
| 41.77.160.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 41.77.216.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.77.248.0/21 | 2k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.104.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.12.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.128.0/22 | 1k | AFRINIC | ZA | 12th Apr 2013 |
| 41.78.132.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.144.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.148.0/22 | 1k | AFRINIC |  EG | 9th Jul 2010 |
| 41.78.152.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.160.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.176.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.180.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.236.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.240.0/22 | 1k | AFRINIC |  GA | 22nd Feb 2011 |
| 41.78.44.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.68.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.78.88.0/22 | 1k | AFRINIC | NG | 22nd Mar 2010 |
| 41.78.92.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.79.0.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.79.100.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.79.112.0/22 | 1k | AFRINIC | CI | 28th Feb 2020 |
| 41.79.116.0/22 | 1k | AFRINIC | NG | 8th Sept 2011 |