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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through LACNIC, largest first.
Unannounced blocks registered through LACNIC
4,569 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 179.61.32.0/19 | 8.2k | LACNIC |  AW | 10th Dec 2013 |
| 179.63.232.0/22 | 1k | LACNIC |  CL | 28th May 2013 |
| 181.189.48.0/22 | 1k | LACNIC |  BR | 7th Dec 2021 |
| 181.189.84.0/22 | 1k | LACNIC | BR | 8th Dec 2021 |
| 181.199.172.0/22 | 1k | LACNIC |  AR | 22nd Jul 2013 |
| 181.224.164.0/23 | 512 | LACNIC |  UY | 11th Apr 2013 |
| 181.233.158.0/24 | 256 | LACNIC |  PY | 14th Dec 2021 |
| 181.233.192.0/18 | 16.4k | LACNIC |  PE | 6th Dec 2012 |
| 186.121.154.0/23 | 512 | LACNIC | AR | 16th Mar 2012 |
| 186.121.156.0/22 | 1k | LACNIC | AR | 16th Mar 2012 |
| 186.195.172.0/22 | 1k | LACNIC | BR | 10th May 2010 |
| 186.195.176.0/20 | 4.1k | LACNIC | BR | 28th Mar 2012 |
| 186.195.246.0/24 | 256 | LACNIC | AR | 30th Jun 2020 |
| 186.195.248.0/22 | 1k | LACNIC |  TT | 24th Jun 2020 |
| 186.196.104.0/21 | 2k | LACNIC | BR | 29th Mar 2010 |
| 186.196.114.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.115.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.116.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.128.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |
| 186.196.15.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.160.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |
| 186.196.192.0/20 | 4.1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.210.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.196.212.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.216.0/21 | 2k | LACNIC | BR | 29th Mar 2010 |
| 186.196.224.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |
| 186.196.64.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.196.66.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.67.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.72.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.196.78.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.198.0.0/18 | 16.4k | LACNIC | BR | 29th Mar 2010 |
| 186.198.102.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.198.108.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.198.110.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.198.112.0/20 | 4.1k | LACNIC | BR | 29th Mar 2010 |
| 186.198.128.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.198.130.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.198.132.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.198.136.0/21 | 2k | LACNIC | BR | 29th Mar 2010 |
| 186.198.152.0/21 | 2k | LACNIC | BR | 29th Mar 2010 |
| 186.198.160.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |
| 186.198.192.0/18 | 16.4k | LACNIC | BR | 29th Mar 2010 |
| 186.198.64.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |
| 186.198.96.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.199.0.0/16 | 65.5k | LACNIC | BR | 29th Mar 2010 |
| 186.208.92.0/22 | 1k | LACNIC | BR | 2nd Jul 2026 |
| 186.209.107.0/24 | 256 | LACNIC | BR | 2nd Jun 2010 |
| 186.232.244.0/24 | 256 | LACNIC | BR | 9th Sept 2010 |
| 186.233.140.0/24 | 256 | LACNIC | BR | 2nd May 2012 |