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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2801:c4:b7::/48 | 65.5k × /64 | LACNIC |  MX | 9th Oct 2023 |
| 2801:d0::/32 | 4.3B × /64 | LACNIC | MX | 11th Oct 2011 |
| 2801:f0:16::/48 | 65.5k × /64 | LACNIC | MX | 15th Mar 2010 |
| 2801:f0:28::/48 | 65.5k × /64 | LACNIC | MX | 1st Jul 2010 |
| 2801:f0::/48 | 65.5k × /64 | LACNIC | MX | 12th Feb 2009 |
| 2803:100::/32 | 4.3B × /64 | LACNIC |  HN | 26th Sept 2012 |
| 2803:1020::/32 | 4.3B × /64 | LACNIC |  CL | 17th Aug 2017 |
| 2803:1050::/32 | 4.3B × /64 | LACNIC |  EC | 5th Oct 2023 |
| 2803:1080::/32 | 4.3B × /64 | LACNIC |  AR | 19th Aug 2013 |
| 2803:1090::/32 | 4.3B × /64 | LACNIC |  PE | 10th May 2022 |
| 2803:10a0::/32 | 4.3B × /64 | LACNIC | AR | 29th Apr 2018 |
| 2803:10b0::/32 | 4.3B × /64 | LACNIC |  CO | 13th Oct 2026 |
| 2803:110::/32 | 4.3B × /64 | LACNIC | EC | 17th Sept 2021 |
| 2803:1120::/32 | 4.3B × /64 | LACNIC | AR | 28th Nov 2017 |
| 2803:1140::/32 | 4.3B × /64 | LACNIC |  DO | 29th Oct 2015 |
| 2803:1150::/32 | 4.3B × /64 | LACNIC | CL | 7th May 2024 |
| 2803:1160::/32 | 4.3B × /64 | LACNIC | EC | 23rd Jul 2019 |
| 2803:1190::/32 | 4.3B × /64 | LACNIC | AR | 11th Jan 2023 |
| 2803:11a0::/32 | 4.3B × /64 | LACNIC | AR | 5th Oct 2018 |
| 2803:11c0::/32 | 4.3B × /64 | LACNIC | AR | 23rd Mar 2017 |
| 2803:1200::/32 | 4.3B × /64 | LACNIC | CL | 7th Jun 2012 |
| 2803:120::/32 | 4.3B × /64 | LACNIC | AR | 23rd Nov 2017 |
| 2803:1210::/32 | 4.3B × /64 | LACNIC | CO | 28th Apr 2021 |
| 2803:1220::/32 | 4.3B × /64 | LACNIC | AR | 11th Oct 2017 |
| 2803:1230::/32 | 4.3B × /64 | LACNIC | AR | 11th Mar 2026 |
| 2803:1240::/32 | 4.3B × /64 | LACNIC | CO | 31st Jul 2015 |
| 2803:1250::/32 | 4.3B × /64 | LACNIC | AR | 18th Jan 2024 |
| 2803:1280::/32 | 4.3B × /64 | LACNIC | PE | 4th Feb 2014 |
| 2803:1290::/32 | 4.3B × /64 | LACNIC | AR | 8th Sept 2022 |
| 2803:12d0::/32 | 4.3B × /64 | LACNIC | CO | 20th Feb 2025 |
| 2803:12e0::/32 | 4.3B × /64 | LACNIC | AR | 31st Jan 2020 |
| 2803:130::/32 | 4.3B × /64 | LACNIC | CL | 7th May 2026 |
| 2803:1330::/32 | 4.3B × /64 | LACNIC |  BO | 3rd Aug 2026 |
| 2803:1350::/32 | 4.3B × /64 | LACNIC | PE | 31st Jul 2024 |
| 2803:1360::/32 | 4.3B × /64 | LACNIC | EC | 25th Sept 2019 |
| 2803:13a0::/32 | 4.3B × /64 | LACNIC | AR | 16th Jan 2019 |
| 2803:13c0::/32 | 4.3B × /64 | LACNIC | AR | 2nd Jun 2017 |
| 2803:140::/32 | 4.3B × /64 | LACNIC | AR | 16th Oct 2015 |
| 2803:1420::/32 | 4.3B × /64 | LACNIC | AR | 14th Sept 2017 |
| 2803:14a0::/32 | 4.3B × /64 | LACNIC |  NI | 12th Jun 2018 |
| 2803:14d0::/32 | 4.3B × /64 | LACNIC | NI | 19th Dec 2024 |
| 2803:14e0::/32 | 4.3B × /64 | LACNIC |  VE | 6th Jan 2020 |
| 2803:150::/32 | 4.3B × /64 | LACNIC | CL | 2nd May 2024 |
| 2803:1580::/32 | 4.3B × /64 | LACNIC | CO | 14th Jul 2014 |
| 2803:1590::/32 | 4.3B × /64 | LACNIC | PE | 29th Mar 2023 |
| 2803:15a0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Nov 2018 |
| 2803:1610::/32 | 4.3B × /64 | LACNIC |  GT | 30th Jul 2021 |
| 2803:1660::/32 | 4.3B × /64 | LACNIC | AR | 13th Jun 2019 |
| 2803:1690::/32 | 4.3B × /64 | LACNIC | DO | 31st Oct 2022 |
| 2803:16c0::/32 | 4.3B × /64 | LACNIC | AR | 9th Feb 2017 |