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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.65.100.0/22 | 1k | RIPE NCC |  IL | 13th Nov 2018 |
| 45.65.12.0/24 | 256 | APNIC |  AU | 28th May 2014 |
| 45.65.13.0/24 | 256 | APNIC | AU | 28th May 2014 |
| 45.65.14.0/23 | 512 | APNIC | AU | 28th May 2014 |
| 45.65.16.0/22 | 1k | APNIC |  CN | 3rd Mar 2016 |
| 45.65.202.0/24 | 256 | LACNIC |  AR | 1st Jun 2017 |
| 45.65.24.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 45.65.28.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 45.65.32.0/22 | 1k | APNIC |  HK | 7th Mar 2016 |
| 45.65.72.0/22 | 1k | RIPE NCC |  SA | 12th Nov 2018 |
| 45.66.12.0/22 | 1k | RIPE NCC |  RU | 12th Feb 2019 |
| 45.66.136.0/22 | 1k | RIPE NCC |  DE | 13th Feb 2019 |
| 45.66.172.0/22 | 1k | RIPE NCC |  CH | 13th Feb 2019 |
| 45.66.236.0/22 | 1k | RIPE NCC |  RO | 14th Feb 2019 |
| 45.67.160.0/22 | 1k | RIPE NCC |  NO | 19th Feb 2019 |
| 45.67.176.0/22 | 1k | RIPE NCC |  BZ | 19th Feb 2019 |
| 45.67.214.0/24 | 256 | RIPE NCC |  SC | 19th Feb 2019 |
| 45.67.240.0/22 | 1k | RIPE NCC |  FR | 20th Feb 2019 |
| 45.67.44.0/22 | 1k | RIPE NCC |  AT | 15th Feb 2019 |
| 45.68.0.0/22 | 1k | LACNIC |  BO | 17th Sept 2020 |
| 45.68.106.0/23 | 512 | LACNIC |  DO | 16th Mar 2026 |
| 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 |
| 45.68.124.0/22 | 1k | LACNIC | CL | 15th May 2026 |
| 45.68.128.0/22 | 1k | LACNIC |  CO | 28th May 2026 |
| 45.68.132.0/22 | 1k | LACNIC | AR | 11th Aug 2026 |
| 45.68.136.0/24 | 256 | LACNIC |  MX | 20th Aug 2026 |
| 45.68.16.0/22 | 1k | LACNIC | CL | 15th Apr 2021 |
| 45.68.23.0/24 | 256 | LACNIC | PE | 19th Apr 2023 |
| 45.68.28.0/22 | 1k | LACNIC | CO | 1st Nov 2022 |
| 45.68.32.0/24 | 256 | LACNIC | CO | 24th Apr 2023 |
| 45.68.36.0/22 | 1k | LACNIC | CO | 12th May 2023 |
| 45.68.64.0/22 | 1k | LACNIC | MX | 26th Jul 2024 |
| 45.68.68.0/22 | 1k | LACNIC | MX | 16th Jul 2024 |
| 45.68.72.0/22 | 1k | LACNIC | BR | 25th Jun 2024 |
| 45.68.76.0/22 | 1k | LACNIC | BR | 25th Jun 2024 |
| 45.68.8.0/22 | 1k | LACNIC | AR | 24th Mar 2021 |
| 45.68.80.0/22 | 1k | LACNIC | BR | 25th Jun 2024 |
| 45.68.84.0/22 | 1k | LACNIC | BR | 25th Jun 2024 |
| 45.68.92.0/23 | 512 | LACNIC | BR | 6th Nov 2024 |
| 45.7.124.0/22 | 1k | LACNIC | AR | 19th May 2017 |
| 45.7.132.0/22 | 1k | LACNIC | CO | 24th May 2017 |
| 45.70.152.0/22 | 1k | LACNIC | AR | 1st Sept 2017 |
| 45.74.152.0/22 | 1k | ARIN |  US | 27th May 2026 |
| 45.74.160.0/20 | 4.1k | ARIN | US | 23rd Apr 2015 |
| 45.74.180.0/22 | 1k | ARIN | US | 7th Aug 2026 |
| 45.74.184.0/22 | 1k | ARIN | US | 26th Jun 2026 |
| 45.74.208.0/23 | 512 | ARIN | US | 8th Jul 2026 |