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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through LACNIC, largest first.
Unannounced blocks in Brazil
1,547 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 186.233.232.0/22 | 1k | LACNIC | BR | 1st Oct 2010 |
| 186.233.248.0/22 | 1k | LACNIC | BR | 23rd Apr 2012 |
| 186.237.60.0/22 | 1k | LACNIC | BR | 17th Apr 2014 |
| 186.243.0.0/18 | 16.4k | LACNIC | BR | 22nd Sept 2010 |
| 186.250.148.0/22 | 1k | LACNIC | BR | 11th Jul 2012 |
| 186.251.36.0/23 | 512 | LACNIC | BR | 24th Oct 2025 |
| 187.16.192.0/19 | 8.2k | LACNIC | BR | 13th Dec 2010 |
| 187.19.64.0/20 | 4.1k | LACNIC | BR | 30th Dec 2008 |
| 187.63.240.0/20 | 4.1k | LACNIC | BR | 1st Jul 2009 |
| 187.94.236.0/24 | 256 | LACNIC | BR | 11th Mar 2021 |
| 187.94.239.0/24 | 256 | LACNIC | BR | 11th Mar 2021 |
| 187.94.48.0/24 | 256 | LACNIC | BR | 14th Sept 2009 |
| 187.94.50.0/23 | 512 | LACNIC | BR | 14th Sept 2009 |
| 187.94.52.0/23 | 512 | LACNIC | BR | 14th Sept 2009 |
| 187.94.54.0/24 | 256 | LACNIC | BR | 14th Sept 2009 |
| 187.94.57.0/24 | 256 | LACNIC | BR | 14th Sept 2009 |
| 187.94.58.0/23 | 512 | LACNIC | BR | 14th Sept 2009 |
| 187.94.60.0/22 | 1k | LACNIC | BR | 14th Sept 2009 |
| 187.95.192.0/20 | 4.1k | LACNIC | BR | 4th Nov 2009 |
| 189.12.208.0/20 | 4.1k | LACNIC | BR | 24th Oct 2006 |
| 189.39.80.0/20 | 4.1k | LACNIC | BR | 28th Jun 2007 |
| 189.75.224.0/20 | 4.1k | LACNIC | BR | 28th Sept 2007 |
| 189.89.254.0/24 | 256 | LACNIC | BR | 4th Mar 2008 |
| 190.109.88.0/22 | 1k | LACNIC | BR | 30th Apr 2015 |
| 190.111.102.0/23 | 512 | LACNIC | BR | 27th Feb 2020 |
| 190.111.136.0/22 | 1k | LACNIC | BR | 24th Mar 2020 |
| 190.111.148.0/22 | 1k | LACNIC | BR | 2nd Mar 2020 |
| 190.112.128.0/22 | 1k | LACNIC | BR | 13th Jan 2020 |
| 190.83.92.0/22 | 1k | LACNIC | BR | 28th Feb 2020 |
| 191.0.96.0/19 | 8.2k | LACNIC | BR | 13th Jan 2014 |
| 191.128.27.0/24 | 256 | LACNIC | BR | 17th Mar 2014 |