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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 201.131.33.0/24 | 256 | LACNIC |  MX | 11th Dec 2013 |
| 201.131.42.0/24 | 256 | LACNIC |  SV | 25th Nov 2014 |
| 201.131.43.0/24 | 256 | LACNIC |  CW | 14th Nov 2014 |
| 201.131.52.0/22 | 1k | LACNIC | MX | 23rd Nov 2005 |
| 201.131.76.0/24 | 256 | LACNIC | MX | 23rd Feb 2007 |
| 201.135.0.0/16 | 65.5k | LACNIC | MX | 20th Apr 2009 |
| 201.139.160.0/21 | 2k | LACNIC | MX | 18th Aug 2005 |
| 201.139.32.0/19 | 8.2k | LACNIC | MX | 4th Jan 2005 |
| 201.141.128.0/17 | 32.8k | LACNIC | MX | 17th Mar 2006 |
| 201.148.192.0/20 | 4.1k | LACNIC | MX | 3rd Jul 2009 |
| 201.148.232.0/22 | 1k | LACNIC |  CR | 16th Jul 2014 |
| 201.150.28.0/22 | 1k | LACNIC |  CL | 1st Jul 2014 |
| 201.150.60.0/22 | 1k | LACNIC |  PE | 24th Jul 2014 |
| 201.150.64.0/20 | 4.1k | LACNIC | MX | 29th Mar 2005 |
| 201.157.218.0/24 | 256 | LACNIC |  BR | 4th Jun 2014 |
| 201.157.248.0/23 | 512 | LACNIC | BR | 4th Jun 2014 |
| 201.157.250.0/24 | 256 | LACNIC | BR | 4th Jun 2014 |
| 201.158.100.0/22 | 1k | LACNIC | BR | 2nd Jan 2020 |
| 201.158.16.0/22 | 1k | LACNIC | MX | 28th Apr 2011 |
| 201.158.52.0/22 | 1k | LACNIC | PE | 23rd Jun 2014 |
| 201.159.148.0/22 | 1k | LACNIC | BR | 1st Jul 2014 |
| 201.159.64.0/22 | 1k | LACNIC | MX | 1st Mar 2007 |
| 201.159.68.0/23 | 512 | LACNIC | MX | 1st Mar 2007 |
| 201.169.0.0/16 | 65.5k | LACNIC | MX | 12th Jun 2014 |
| 201.221.121.0/24 | 256 | LACNIC | CL | 27th Sept 2012 |
| 201.222.16.0/22 | 1k | LACNIC |  AR | 27th Jun 2014 |
| 201.46.122.0/23 | 512 | LACNIC | BR | 18th Aug 2005 |
| 201.49.148.0/23 | 512 | LACNIC | BR | 22nd Jun 2010 |
| 201.49.150.0/24 | 256 | LACNIC | BR | 22nd Jun 2010 |
| 201.49.151.0/24 | 256 | LACNIC | BR | 22nd Jun 2010 |
| 201.71.204.0/22 | 1k | LACNIC | MX | 27th Feb 2020 |
| 201.87.139.0/24 | 256 | LACNIC | BR | 25th May 2006 |
| 201.87.140.0/23 | 512 | LACNIC | BR | 25th May 2006 |
| 201.87.157.0/24 | 256 | LACNIC | BR | 7th May 2008 |
| 204.145.201.0/24 | 256 | LACNIC | MX | 18th Jan 1995 |
| 204.58.136.0/22 | 1k | LACNIC | MX | 15th Jan 1995 |
| 204.80.143.0/24 | 256 | LACNIC | MX | 11th Jan 1995 |
| 204.89.206.0/24 | 256 | LACNIC | MX | 17th Sept 1994 |
| 205.166.251.0/24 | 256 | LACNIC | MX | 21st Apr 1995 |
| 206.168.4.0/22 | 1k | LACNIC |  CO | 16th Apr 2024 |
| 206.223.124.0/24 | 256 | LACNIC | CO | 29th Jun 2000 |
| 206.224.32.0/19 | 8.2k | LACNIC |  PA | 10th Oct 1995 |
| 207.248.100.0/24 | 256 | LACNIC | MX | 4th Feb 1997 |
| 207.248.114.0/23 | 512 | LACNIC | MX | 15th Jan 1997 |
| 207.248.120.0/24 | 256 | LACNIC | MX | 31st Dec 1996 |
| 207.248.122.0/24 | 256 | LACNIC | MX | 11th Jun 2011 |
| 207.248.70.0/24 | 256 | LACNIC | MX | 3rd Aug 2007 |
| 207.248.71.0/24 | 256 | LACNIC | MX | 3rd Aug 2007 |
| 207.248.72.0/23 | 512 | LACNIC | MX | 23rd Dec 1996 |
| 207.248.78.0/23 | 512 | LACNIC | MX | 5th Feb 1997 |