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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 129.90.0.0/16 | 65.5k | LACNIC |  VE | 5th Sept 1987 |
| 131.0.152.0/22 | 1k | LACNIC |  BR | 14th Jul 2014 |
| 131.0.36.0/22 | 1k | LACNIC | BR | 10th Jul 2014 |
| 131.100.112.0/22 | 1k | LACNIC | BR | 26th Aug 2014 |
| 131.100.32.0/22 | 1k | LACNIC | BR | 8th Aug 2014 |
| 131.108.96.0/22 | 1k | LACNIC | BR | 1st Sept 2014 |
| 131.221.152.0/22 | 1k | LACNIC | BR | 30th Apr 2026 |
| 131.221.28.0/22 | 1k | LACNIC |  TT | 22nd Oct 2014 |
| 131.255.128.0/23 | 512 | LACNIC |  AR | 12th Sept 2024 |
| 131.72.112.0/22 | 1k | LACNIC |  CW | 30th Jul 2014 |
| 132.255.0.0/22 | 1k | LACNIC |  PE | 12th Nov 2014 |
| 138.121.176.0/22 | 1k | LACNIC |  CL | 11th Jun 2015 |
| 138.121.68.0/22 | 1k | LACNIC | BR | 3rd Jun 2015 |
| 138.185.116.0/22 | 1k | LACNIC | PE | 31st Jul 2015 |
| 138.185.228.0/22 | 1k | LACNIC | BR | 7th Jul 2015 |
| 138.204.204.0/22 | 1k | LACNIC |  MX | 10th Aug 2015 |
| 138.219.80.0/22 | 1k | LACNIC | AR | 11th Aug 2015 |
| 138.36.146.0/24 | 256 | LACNIC | VE | 28th Jan 2015 |
| 138.59.108.0/22 | 1k | LACNIC |  EC | 10th Mar 2015 |
| 138.59.116.0/22 | 1k | LACNIC | VE | 13th Feb 2015 |
| 138.94.248.0/22 | 1k | LACNIC |  GY | 6th Apr 2015 |
| 138.97.172.0/22 | 1k | LACNIC | BR | 30th Mar 2015 |
| 138.99.24.0/22 | 1k | LACNIC | BR | 13th Mar 2015 |
| 140.191.0.0/16 | 65.5k | LACNIC | AR | 23rd May 1990 |
| 143.137.24.0/22 | 1k | LACNIC |  NI | 15th Sept 2015 |
| 143.202.20.0/22 | 1k | LACNIC | AR | 29th Sept 2015 |
| 144.23.0.0/16 | 65.5k | LACNIC |  CR | 6th Nov 1990 |
| 148.222.188.0/22 | 1k | LACNIC | MX | 21st Dec 1992 |
| 148.224.16.0/21 | 2k | LACNIC | PE | 21st May 1993 |
| 148.224.30.0/24 | 256 | LACNIC | MX | 21st May 1993 |
| 148.224.40.0/22 | 1k | LACNIC | MX | 21st May 1993 |
| 148.224.47.0/24 | 256 | LACNIC | MX | 21st May 1993 |
| 148.224.52.0/22 | 1k | LACNIC | MX | 21st May 1993 |
| 148.224.61.0/24 | 256 | LACNIC |  GT | 21st May 1993 |
| 148.227.128.0/19 | 8.2k | LACNIC | MX | 26th Dec 1997 |
| 148.227.160.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.164.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.166.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 148.227.168.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 148.227.171.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 148.227.172.0/24 | 256 | LACNIC | PE | 26th Dec 1997 |
| 148.227.176.0/20 | 4.1k | LACNIC | MX | 26th Dec 1997 |
| 148.227.192.0/20 | 4.1k | LACNIC | MX | 26th Dec 1997 |
| 148.227.224.0/19 | 8.2k | LACNIC | MX | 26th Dec 1997 |
| 148.242.0.0/16 | 65.5k | LACNIC | MX | 10th Oct 2000 |
| 148.248.0.0/16 | 65.5k | LACNIC | MX | 1st Sept 1994 |
| 152.139.0.0/16 | 65.5k | LACNIC | CL | 21st Aug 1991 |
| 152.237.0.0/18 | 16.4k | LACNIC | BR | 15th May 2014 |
| 152.237.128.0/18 | 16.4k | LACNIC | BR | 15th May 2014 |
| 152.237.192.0/20 | 4.1k | LACNIC | BR | 13th Mar 2025 |