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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
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 |
|---|---|---|---|---|
| 45.178.32.0/22 | 1k | LACNIC |  BR | 4th Jun 2019 |
| 45.178.4.0/22 | 1k | LACNIC |  CO | 11th Jun 2019 |
| 45.178.64.0/22 | 1k | LACNIC | CO | 20th Jun 2019 |
| 45.179.199.0/24 | 256 | LACNIC | BR | 1st Jul 2019 |
| 45.180.176.0/23 | 512 | LACNIC |  AR | 28th Aug 2019 |
| 45.182.142.0/24 | 256 | LACNIC |  NI | 19th Aug 2019 |
| 45.182.143.0/24 | 256 | LACNIC | AR | 14th Aug 2019 |
| 45.182.64.0/22 | 1k | LACNIC | BR | 12th Aug 2019 |
| 45.183.108.0/22 | 1k | LACNIC |  PE | 9th Sept 2019 |
| 45.183.120.0/23 | 512 | LACNIC |  DO | 26th Nov 2024 |
| 45.184.132.0/22 | 1k | LACNIC | DO | 14th Oct 2019 |
| 45.184.144.0/22 | 1k | LACNIC | BR | 10th Sept 2019 |
| 45.185.149.0/24 | 256 | LACNIC | BR | 22nd Oct 2019 |
| 45.185.43.0/24 | 256 | LACNIC |  CR | 23rd Sept 2019 |
| 45.186.143.0/24 | 256 | LACNIC | BR | 12th Nov 2019 |
| 45.188.59.0/24 | 256 | LACNIC | BR | 12th Nov 2019 |
| 45.189.156.0/22 | 1k | LACNIC |  MX | 11th Dec 2019 |
| 45.191.112.0/22 | 1k | LACNIC | AR | 17th Feb 2020 |
| 45.225.32.0/22 | 1k | LACNIC | BR | 18th Oct 2017 |
| 45.225.42.0/24 | 256 | LACNIC |  BZ | 17th Oct 2017 |
| 45.225.96.0/22 | 1k | LACNIC | AR | 18th Oct 2017 |
| 45.227.0.0/22 | 1k | LACNIC | BR | 9th Nov 2017 |
| 45.227.128.0/23 | 512 | LACNIC | AR | 7th Dec 2017 |
| 45.227.244.0/22 | 1k | LACNIC | AR | 29th Nov 2017 |
| 45.227.88.0/22 | 1k | LACNIC |  VE | 21st Oct 2026 |
| 45.228.156.0/24 | 256 | LACNIC | BZ | 28th Dec 2017 |
| 45.228.202.0/24 | 256 | LACNIC | AR | 27th Dec 2017 |
| 45.228.212.0/22 | 1k | LACNIC | BR | 20th Dec 2017 |
| 45.228.232.0/24 | 256 | LACNIC |  GT | 9th Jan 2018 |
| 45.230.52.0/22 | 1k | LACNIC | BR | 29th Jan 2018 |
| 45.233.238.0/23 | 512 | LACNIC | BR | 29th Mar 2018 |
| 45.233.4.0/22 | 1k | LACNIC | CO | 13th Apr 2018 |
| 45.233.72.0/22 | 1k | LACNIC | CO | 11th Apr 2018 |
| 45.235.126.0/23 | 512 | LACNIC | BR | 25th Apr 2018 |
| 45.236.60.0/22 | 1k | LACNIC | BR | 9th May 2018 |
| 45.236.88.0/22 | 1k | LACNIC |  CL | 8th May 2018 |
| 45.237.204.0/22 | 1k | LACNIC | BR | 7th Jun 2018 |
| 45.239.106.0/24 | 256 | LACNIC | BR | 29th Aug 2018 |
| 45.239.200.0/22 | 1k | LACNIC | BR | 22nd Aug 2018 |
| 45.4.168.0/22 | 1k | LACNIC | CL | 17th Mar 2017 |
| 45.6.104.0/22 | 1k | LACNIC | AR | 7th Apr 2017 |
| 45.6.248.0/22 | 1k | LACNIC |  UY | 27th Apr 2017 |
| 45.6.252.0/22 | 1k | LACNIC | UY | 27th Apr 2017 |
| 45.6.52.0/22 | 1k | LACNIC | BR | 28th Mar 2017 |
| 45.65.202.0/24 | 256 | LACNIC | AR | 1st Jun 2017 |
| 45.68.0.0/22 | 1k | LACNIC |  BO | 17th Sept 2020 |
| 45.68.112.0/24 | 256 | LACNIC | BR | 3rd Dec 2025 |
| 45.68.114.0/23 | 512 | LACNIC | CL | 31st Mar 2026 |
| 45.68.116.0/22 | 1k | LACNIC | PE | 6th May 2026 |
| 45.68.12.0/22 | 1k | LACNIC | AR | 24th Mar 2021 |