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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 Argentina
845 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 131.255.128.0/23 | 512 | LACNIC |  AR | 12th Sept 2024 |
| 138.219.80.0/22 | 1k | LACNIC | AR | 11th Aug 2015 |
| 140.191.0.0/16 | 65.5k | LACNIC | AR | 23rd May 1990 |
| 143.202.20.0/22 | 1k | LACNIC | AR | 29th Sept 2015 |
| 167.252.0.0/16 | 65.5k | LACNIC | AR | 26th Nov 1993 |
| 168.181.204.0/22 | 1k | LACNIC | AR | 24th Feb 2016 |
| 168.181.44.0/22 | 1k | LACNIC | AR | 15th Feb 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 |
| 170.238.67.0/24 | 256 | LACNIC | AR | 28th Nov 2016 |
| 170.246.48.0/22 | 1k | LACNIC | AR | 27th Jan 2017 |
| 177.200.234.0/23 | 512 | LACNIC | AR | 30th Jun 2020 |
| 177.71.96.0/22 | 1k | LACNIC | AR | 31st Oct 2022 |
| 177.87.250.0/23 | 512 | LACNIC | AR | 21st Jul 2020 |
| 179.0.14.0/24 | 256 | LACNIC | AR | 30th Jul 2013 |
| 179.0.148.0/24 | 256 | LACNIC | AR | 6th Jan 2014 |
| 179.0.203.0/24 | 256 | LACNIC | AR | 9th Apr 2014 |
| 179.1.160.0/20 | 4.1k | LACNIC | AR | 26th Apr 2013 |
| 179.61.0.0/21 | 2k | LACNIC | AR | 6th Dec 2013 |
| 181.199.172.0/22 | 1k | LACNIC | AR | 22nd Jul 2013 |
| 186.121.154.0/23 | 512 | LACNIC | AR | 16th Mar 2012 |
| 186.121.156.0/22 | 1k | LACNIC | AR | 16th Mar 2012 |
| 186.121.188.0/23 | 512 | LACNIC | AR | 16th Mar 2012 |
| 186.121.190.0/24 | 256 | LACNIC | AR | 16th Mar 2012 |
| 186.189.252.0/22 | 1k | LACNIC | AR | 13th Jun 2014 |
| 186.195.246.0/24 | 256 | LACNIC | AR | 30th Jun 2020 |
| 186.58.0.0/15 | 131k | LACNIC | AR | 30th Dec 2008 |
| 187.102.232.0/22 | 1k | LACNIC | AR | 17th Jun 2026 |
| 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 |
| 190.112.44.0/22 | 1k | LACNIC | AR | 5th Oct 2010 |
| 190.8.12.0/22 | 1k | LACNIC | AR | 5th Feb 2007 |
| 199.248.144.0/24 | 256 | LACNIC | AR | 14th Sept 1994 |
| 200.0.17.0/24 | 256 | LACNIC | AR | 9th Nov 2010 |
| 200.0.181.0/24 | 256 | LACNIC | AR | 20th Apr 1995 |
| 200.0.186.0/24 | 256 | LACNIC | AR | 17th Jul 1995 |
| 200.0.19.0/24 | 256 | LACNIC | AR | 9th Nov 2010 |
| 200.0.198.0/23 | 512 | LACNIC | AR | 8th Sept 1995 |
| 200.0.200.0/24 | 256 | LACNIC | AR | 31st Oct 1995 |
| 200.0.79.0/24 | 256 | LACNIC | AR | 31st Mar 1993 |
| 200.0.80.0/24 | 256 | LACNIC | AR | 31st Mar 1993 |
| 200.10.128.0/24 | 256 | LACNIC | AR | 25th Feb 1994 |
| 200.10.129.0/24 | 256 | LACNIC | AR | 25th Feb 1994 |
| 200.10.139.0/24 | 256 | LACNIC | AR | 15th Mar 1994 |
| 200.10.207.0/24 | 256 | LACNIC | AR | 25th May 1994 |
| 200.10.219.0/24 | 256 | LACNIC | AR | 6th Jun 1994 |
| 200.11.29.0/24 | 256 | LACNIC | AR | 7th Apr 2009 |
| 200.110.224.0/21 | 2k | LACNIC | AR | 27th Oct 2006 |