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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 registered through LACNIC
4,642 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 152.237.96.0/19 | 8.2k | LACNIC |  BR | 15th May 2014 |
| 155.211.0.0/16 | 65.5k | LACNIC | BR | 26th Nov 1991 |
| 156.97.0.0/16 | 65.5k | LACNIC |  CL | 23rd Dec 1991 |
| 160.20.218.0/23 | 512 | LACNIC |  VE | 20th Mar 2018 |
| 160.238.148.0/22 | 1k | LACNIC | BR | 16th May 2017 |
| 160.238.252.0/22 | 1k | LACNIC | CL | 15th May 2017 |
| 161.25.0.0/16 | 65.5k | LACNIC | CL | 4th May 1992 |
| 162.122.0.0/16 | 65.5k | LACNIC | VE | 6th Nov 1992 |
| 163.250.0.0/16 | 65.5k | LACNIC | CL | 8th Oct 1992 |
| 164.96.0.0/16 | 65.5k | LACNIC | CL | 29th Jan 1993 |
| 164.98.0.0/16 | 65.5k | LACNIC | CL | 2nd Feb 1993 |
| 166.110.0.0/16 | 65.5k | LACNIC | CL | 7th Dec 1993 |
| 167.134.0.0/16 | 65.5k | LACNIC | VE | 12th Jul 1993 |
| 167.250.84.0/22 | 1k | LACNIC | BR | 14th Dec 2015 |
| 167.252.0.0/16 | 65.5k | LACNIC |  AR | 26th Nov 1993 |
| 168.0.252.0/22 | 1k | LACNIC | BR | 11th Jan 2016 |
| 168.121.128.0/22 | 1k | LACNIC |  PA | 1st Feb 2016 |
| 168.121.164.0/22 | 1k | LACNIC | BR | 5th Feb 2016 |
| 168.121.244.0/22 | 1k | LACNIC | BR | 5th Mar 2021 |
| 168.181.204.0/22 | 1k | LACNIC | AR | 24th Feb 2016 |
| 168.181.44.0/22 | 1k | LACNIC | AR | 15th Feb 2016 |
| 168.194.168.0/22 | 1k | LACNIC | CL | 2nd Aug 2016 |
| 168.194.44.0/22 | 1k | LACNIC | BR | 28th Jul 2016 |
| 168.196.3.0/24 | 256 | LACNIC |  MX | 19th Aug 2016 |
| 168.197.156.0/22 | 1k | LACNIC | BR | 14th Sept 2016 |
| 168.197.20.0/22 | 1k | LACNIC | BR | 6th Sept 2016 |
| 168.205.144.0/22 | 1k | LACNIC | BR | 7th Mar 2016 |
| 168.227.240.0/22 | 1k | LACNIC | BR | 31st Mar 2016 |
| 168.228.190.0/23 | 512 | LACNIC | BR | 14th Apr 2016 |
| 168.231.0.0/18 | 16.4k | LACNIC | CL | 25th Aug 1994 |
| 168.90.116.0/22 | 1k | LACNIC | BR | 15th Jan 2016 |
| 168.90.156.0/22 | 1k | LACNIC | CL | 15th Jan 2016 |
| 170.150.196.0/22 | 1k | LACNIC | AR | 13th Jun 2016 |
| 170.231.136.0/22 | 1k | LACNIC | AR | 21st Jun 2016 |
| 170.231.68.0/22 | 1k | LACNIC | AR | 17th Jun 2016 |
| 170.238.220.0/22 | 1k | LACNIC | MX | 11th Nov 2016 |
| 170.238.225.0/24 | 256 | LACNIC | BR | 6th Dec 2016 |
| 170.238.67.0/24 | 256 | LACNIC | AR | 28th Nov 2016 |
| 170.245.140.0/22 | 1k | LACNIC | BR | 20th Jan 2017 |
| 170.246.48.0/22 | 1k | LACNIC | AR | 27th Jan 2017 |
| 170.247.232.0/22 | 1k | LACNIC | BR | 17th Feb 2017 |
| 170.79.212.0/22 | 1k | LACNIC | BR | 17th Oct 2016 |
| 170.80.248.0/22 | 1k | LACNIC |  HT | 8th Dec 2016 |
| 170.83.192.0/22 | 1k | LACNIC | HT | 17th Jan 2017 |
| 170.83.56.0/23 | 512 | LACNIC | BR | 10th Jan 2017 |
| 170.84.188.0/22 | 1k | LACNIC | MX | 7th Jun 2016 |
| 170.84.254.0/24 | 256 | LACNIC |  AW | 10th Aug 2022 |
| 170.84.32.0/22 | 1k | LACNIC | BR | 20th May 2016 |
| 177.105.96.0/20 | 4.1k | LACNIC | BR | 11th Nov 2011 |
| 177.11.88.0/22 | 1k | LACNIC | BR | 28th Dec 2010 |