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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 177.221.140.0/23 | 512 | LACNIC |  CL | 29th May 2020 |
| 177.223.192.0/19 | 8.2k | LACNIC |  BR | 1st Feb 2013 |
| 177.234.0.0/17 | 32.8k | LACNIC |  MX | 13th Sept 2013 |
| 177.3.128.0/20 | 4.1k | LACNIC | BR | 4th Nov 2010 |
| 177.36.28.0/22 | 1k | LACNIC | CL | 21st Jan 2026 |
| 177.39.4.0/22 | 1k | LACNIC | BR | 4th Mar 2011 |
| 177.52.38.0/23 | 512 | LACNIC | BR | 23rd Jul 2020 |
| 177.52.56.0/22 | 1k | LACNIC | BR | 19th Sept 2012 |
| 177.53.188.0/24 | 256 | LACNIC | BR | 26th Dec 2011 |
| 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 |
| 177.67.32.0/24 | 256 | LACNIC | BR | 27th Jun 2011 |
| 177.71.96.0/22 | 1k | LACNIC |  AR | 31st Oct 2022 |
| 177.72.255.0/24 | 256 | LACNIC | BR | 13th Dec 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 |
| 177.87.250.0/23 | 512 | LACNIC | AR | 21st Jul 2020 |
| 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 |
| 179.0.148.0/24 | 256 | LACNIC | AR | 6th Jan 2014 |
| 179.0.30.0/24 | 256 | LACNIC |  BO | 22nd Nov 2013 |
| 179.0.31.0/24 | 256 | LACNIC |  HN | 22nd Nov 2013 |
| 179.1.160.0/20 | 4.1k | LACNIC | AR | 26th Apr 2013 |
| 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 |
| 179.253.192.0/19 | 8.2k | LACNIC | BR | 23rd Jan 2013 |
| 179.51.252.0/22 | 1k | LACNIC |  BZ | 7th Nov 2013 |
| 179.61.0.0/21 | 2k | LACNIC | AR | 6th Dec 2013 |