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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
4,655 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 186.25.0.0/16 | 65.5k | LACNIC |  VE | 28th Jan 2010 |
| 186.250.148.0/22 | 1k | LACNIC | BR | 11th Jul 2012 |
| 186.251.236.0/22 | 1k | LACNIC | BR | 10th Dec 2010 |
| 186.251.36.0/23 | 512 | LACNIC | BR | 24th Oct 2025 |
| 186.58.0.0/15 | 131k | LACNIC |  AR | 30th Dec 2008 |
| 186.96.200.0/21 | 2k | LACNIC |  AW | 22nd Sept 2011 |
| 186.96.224.0/20 | 4.1k | LACNIC | AW | 22nd Oct 2010 |
| 186.96.240.0/21 | 2k | LACNIC | AW | 22nd Oct 2010 |
| 187.102.232.0/22 | 1k | LACNIC | AR | 17th Jun 2026 |
| 187.16.192.0/19 | 8.2k | LACNIC | BR | 13th Dec 2010 |
| 187.165.0.0/16 | 65.5k | LACNIC |  MX | 11th Jul 2011 |
| 187.166.0.0/15 | 131k | LACNIC | MX | 11th Jul 2011 |
| 187.179.160.0/19 | 8.2k | LACNIC | MX | 27th Jul 2010 |
| 187.179.192.0/18 | 16.4k | LACNIC | MX | 27th Jul 2010 |
| 187.19.64.0/20 | 4.1k | LACNIC | BR | 30th Dec 2008 |
| 187.191.128.0/17 | 32.8k | LACNIC | MX | 12th Jun 2014 |
| 187.251.32.0/19 | 8.2k | LACNIC | MX | 29th Nov 2012 |
| 187.49.8.0/24 | 256 | LACNIC |  EC | 12th Apr 2022 |
| 187.49.9.0/24 | 256 | LACNIC |  CL | 2nd May 2022 |
| 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 |
| 189.201.246.0/24 | 256 | LACNIC | MX | 6th Aug 2007 |
| 189.201.247.0/24 | 256 | LACNIC | MX | 6th Aug 2007 |
| 189.51.172.0/22 | 1k | LACNIC | MX | 17th Jun 2020 |
| 189.89.254.0/24 | 256 | LACNIC | BR | 4th Mar 2008 |
| 190.103.32.0/20 | 4.1k | LACNIC | MX | 7th Jul 2026 |
| 190.103.48.0/20 | 4.1k | LACNIC | VE | 31st Mar 2009 |
| 190.109.88.0/22 | 1k | LACNIC | BR | 30th Apr 2015 |
| 190.110.0.0/19 | 8.2k | LACNIC | MX | 10th Sept 2008 |
| 190.110.240.0/24 | 256 | LACNIC | AR | 28th Nov 2011 |
| 190.110.242.0/23 | 512 | LACNIC | AR | 28th Nov 2011 |
| 190.110.244.0/24 | 256 | LACNIC | AR | 28th Nov 2011 |
| 190.111.102.0/23 | 512 | LACNIC | BR | 27th Feb 2020 |
| 190.112.128.0/22 | 1k | LACNIC | BR | 13th Jan 2020 |
| 190.112.44.0/22 | 1k | LACNIC | AR | 5th Oct 2010 |
| 190.113.33.0/24 | 256 | LACNIC |  GT | 19th Feb 2021 |
| 190.113.34.0/23 | 512 | LACNIC | GT | 19th Feb 2021 |
| 190.12.224.0/19 | 8.2k | LACNIC | AW | 14th May 2007 |