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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,481 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:1fa0::/32 | 4.3B × /64 | LACNIC |  AR | 11th Mar 2019 |
| 2803:1fd0::/32 | 4.3B × /64 | LACNIC |  CO | 21st Nov 2025 |
| 2803:1fe0::/32 | 4.3B × /64 | LACNIC | AR | 4th Sept 2020 |
| 2803:2000::/32 | 4.3B × /64 | LACNIC | AR | 31st Jan 2012 |
| 2803:2020::/32 | 4.3B × /64 | LACNIC | AR | 14th Aug 2017 |
| 2803:2030::/32 | 4.3B × /64 | LACNIC |  BO | 9th Dec 2025 |
| 2803:2040::/32 | 4.3B × /64 | LACNIC |  CR | 1st Apr 2015 |
| 2803:2060::/32 | 4.3B × /64 | LACNIC | CO | 26th Mar 2019 |
| 2803:2090::/32 | 4.3B × /64 | LACNIC | CO | 2nd May 2022 |
| 2803:20a0::/32 | 4.3B × /64 | LACNIC | AR | 27th Apr 2018 |
| 2803:20d0::/32 | 4.3B × /64 | LACNIC |  DO | 25th Oct 2024 |
| 2803:20e0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Nov 2019 |
| 2803:2120::/32 | 4.3B × /64 | LACNIC |  CL | 24th Nov 2017 |
| 2803:2140::/32 | 4.3B × /64 | LACNIC | AR | 22nd Oct 2015 |
| 2803:2150::/32 | 4.3B × /64 | LACNIC |  HN | 5th May 2024 |
| 2803:2160::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jul 2019 |
| 2803:2190::/32 | 4.3B × /64 | LACNIC | AR | 9th Jan 2023 |
| 2803:21a0::/32 | 4.3B × /64 | LACNIC | CR | 1st Oct 2018 |
| 2803:220::/32 | 4.3B × /64 | LACNIC | AR | 5th Oct 2017 |
| 2803:2240::/32 | 4.3B × /64 | LACNIC | AR | 24th Jul 2015 |
| 2803:2250::/32 | 4.3B × /64 | LACNIC | CO | 12th Jan 2024 |
| 2803:2260::/32 | 4.3B × /64 | LACNIC | CL | 21st May 2019 |
| 2803:2290::/32 | 4.3B × /64 | LACNIC |  VE | 29th Aug 2022 |
| 2803:22c0::/32 | 4.3B × /64 | LACNIC | VE | 20th Dec 2016 |
| 2803:22e0::/32 | 4.3B × /64 | LACNIC | AR | 27th Jan 2020 |
| 2803:230::/32 | 4.3B × /64 | LACNIC | DO | 27th Feb 2026 |
| 2803:2310::/32 | 4.3B × /64 | LACNIC | CO | 21st Jan 2022 |
| 2803:2340::/32 | 4.3B × /64 | LACNIC | AR | 5th Apr 2016 |
| 2803:23a0::/32 | 4.3B × /64 | LACNIC | CL | 9th Jan 2019 |
| 2803:23d0::/32 | 4.3B × /64 | LACNIC | VE | 22nd Sept 2025 |
| 2803:23e0::/32 | 4.3B × /64 | LACNIC | VE | 27th Jul 2020 |
| 2803:2400::/32 | 4.3B × /64 | LACNIC | AR | 21st Mar 2012 |
| 2803:240::/32 | 4.3B × /64 | LACNIC | CO | 22nd Jul 2015 |
| 2803:2410::/32 | 4.3B × /64 | LACNIC |  NI | 26th Jan 2021 |
| 2803:2420::/32 | 4.3B × /64 | LACNIC | AR | 11th Sept 2017 |
| 2803:2440::/32 | 4.3B × /64 | LACNIC | AR | 5th Jun 2015 |
| 2803:2490::/32 | 4.3B × /64 | LACNIC |  EC | 1st Jul 2022 |
| 2803:24c0::/32 | 4.3B × /64 | LACNIC | CO | 19th Oct 2016 |
| 2803:24e0::/32 | 4.3B × /64 | LACNIC | AR | 2nd Jan 2020 |
| 2803:2520::/32 | 4.3B × /64 | LACNIC | AR | 22nd Dec 2017 |
| 2803:25c0::/32 | 4.3B × /64 | LACNIC | CL | 2nd May 2017 |
| 2803:25d0::/32 | 4.3B × /64 | LACNIC | AR | 17th Jul 2025 |
| 2803:260::/32 | 4.3B × /64 | LACNIC | AR | 17th May 2019 |
| 2803:2620::/32 | 4.3B × /64 | LACNIC |  GT | 31st Oct 2017 |
| 2803:2630::/32 | 4.3B × /64 | LACNIC |  GY | 14th Apr 2026 |
| 2803:2640::/32 | 4.3B × /64 | LACNIC | CO | 7th Sept 2015 |
| 2803:2660::/32 | 4.3B × /64 | LACNIC | CL | 12th Jun 2019 |
| 2803:2680::/32 | 4.3B × /64 | LACNIC |  UY | 14th Apr 2014 |
| 2803:2690::/32 | 4.3B × /64 | LACNIC | BO | 20th Oct 2022 |
| 2803:26a0::/32 | 4.3B × /64 | LACNIC | AR | 21st Aug 2018 |