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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks in Brazil
1,567 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 177.67.249.0/24 | 256 | LACNIC |  BR | 26th Aug 2011 |
| 177.67.251.0/24 | 256 | LACNIC | BR | 30th Aug 2011 |
| 177.67.252.0/24 | 256 | LACNIC | BR | 16th Aug 2011 |
| 177.67.255.0/24 | 256 | LACNIC | BR | 20th Oct 2011 |
| 177.72.255.0/24 | 256 | LACNIC | BR | 13th Dec 2011 |
| 177.73.41.0/24 | 256 | LACNIC | BR | 1st Apr 2020 |
| 177.75.176.0/20 | 4.1k | LACNIC | BR | 22nd Sept 2011 |
| 177.84.184.0/21 | 2k | LACNIC | BR | 26th Dec 2013 |
| 177.84.228.0/22 | 1k | LACNIC | BR | 24th Jan 2013 |
| 177.85.239.0/24 | 256 | LACNIC | BR | 16th Oct 2012 |
| 177.86.224.0/22 | 1k | LACNIC | BR | 17th Nov 2011 |
| 177.91.136.0/22 | 1k | LACNIC | BR | 4th Dec 2013 |
| 177.91.4.0/22 | 1k | LACNIC | BR | 26th Nov 2013 |
| 177.93.120.0/21 | 2k | LACNIC | BR | 15th May 2014 |
| 179.108.184.0/21 | 2k | LACNIC | BR | 11th Apr 2014 |
| 179.109.176.0/20 | 4.1k | LACNIC | BR | 20th Aug 2013 |
| 179.127.208.0/20 | 4.1k | LACNIC | BR | 11th Oct 2013 |
| 179.237.26.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.32.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.34.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.36.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.38.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.40.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.42.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.44.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.46.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.48.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.50.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.52.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.54.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.56.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.58.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.60.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.237.62.0/23 | 512 | LACNIC | BR | 10th Dec 2012 |
| 179.49.240.0/22 | 1k | LACNIC | BR | 17th Aug 2020 |
| 181.189.48.0/22 | 1k | LACNIC | BR | 7th Dec 2021 |
| 181.189.84.0/22 | 1k | LACNIC | BR | 8th Dec 2021 |
| 186.195.172.0/22 | 1k | LACNIC | BR | 10th May 2010 |
| 186.195.176.0/20 | 4.1k | LACNIC | BR | 28th Mar 2012 |
| 186.196.15.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.16.0/20 | 4.1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.32.0/20 | 4.1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.64.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.68.0/22 | 1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.72.0/23 | 512 | LACNIC | BR | 29th Mar 2010 |
| 186.196.74.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.75.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.77.0/24 | 256 | LACNIC | BR | 29th Mar 2010 |
| 186.196.80.0/20 | 4.1k | LACNIC | BR | 29th Mar 2010 |
| 186.196.96.0/19 | 8.2k | LACNIC | BR | 29th Mar 2010 |