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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:6c60::/32 | 4.3B × /64 | LACNIC |  AR | 10th May 2019 |
| 2803:6c80::/32 | 4.3B × /64 | LACNIC | AR | 6th Dec 2013 |
| 2803:6ca0::/32 | 4.3B × /64 | LACNIC | AR | 28th Jun 2018 |
| 2803:6d30::/32 | 4.3B × /64 | LACNIC |  CO | 9th Jul 2026 |
| 2803:6d40::/32 | 4.3B × /64 | LACNIC | AR | 25th Feb 2016 |
| 2803:6d60::/32 | 4.3B × /64 | LACNIC |  SV | 10th Sept 2019 |
| 2803:6da0::/32 | 4.3B × /64 | LACNIC | AR | 10th Dec 2018 |
| 2803:6dc0::/32 | 4.3B × /64 | LACNIC | AR | 18th May 2017 |
| 2803:6e10::/32 | 4.3B × /64 | LACNIC |  CR | 31st Aug 2021 |
| 2803:6e30::/32 | 4.3B × /64 | LACNIC | AR | 23rd Apr 2026 |
| 2803:6e40::/32 | 4.3B × /64 | LACNIC | AR | 8th Oct 2015 |
| 2803:6e50::/32 | 4.3B × /64 | LACNIC |  VE | 15th Apr 2024 |
| 2803:6e60::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2019 |
| 2803:6ea0::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2018 |
| 2803:6ec0::/32 | 4.3B × /64 | LACNIC |  EC | 7th Mar 2017 |
| 2803:6ed0::/32 | 4.3B × /64 | LACNIC | CO | 7th May 2025 |
| 2803:6ee0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Apr 2020 |
| 2803:6f60::/32 | 4.3B × /64 | LACNIC | AR | 7th Nov 2019 |
| 2803:6f80::/32 | 4.3B × /64 | LACNIC | CO | 23rd Feb 2015 |
| 2803:6fc0::/32 | 4.3B × /64 | LACNIC | AR | 1st Aug 2017 |
| 2803:6fd0::/32 | 4.3B × /64 | LACNIC |  DO | 21st Nov 2025 |
| 2803:6fe0::/32 | 4.3B × /64 | LACNIC | AR | 3rd Sept 2020 |
| 2803:7020::/32 | 4.3B × /64 | LACNIC | AR | 22nd Aug 2017 |
| 2803:7040::/32 | 4.3B × /64 | LACNIC | AR | 17th Apr 2015 |
| 2803:7060::/32 | 4.3B × /64 | LACNIC | AR | 29th Mar 2019 |
| 2803:70a0::/32 | 4.3B × /64 | LACNIC | EC | 9th May 2018 |
| 2803:7130::/32 | 4.3B × /64 | LACNIC | CO | 27th May 2026 |
| 2803:7150::/32 | 4.3B × /64 | LACNIC | CO | 14th May 2024 |
| 2803:71e0::/32 | 4.3B × /64 | LACNIC |  PE | 20th May 2020 |
| 2803:7220::/32 | 4.3B × /64 | LACNIC | AR | 17th Oct 2017 |
| 2803:7230::/32 | 4.3B × /64 | LACNIC | AR | 16th Mar 2026 |
| 2803:7240::/32 | 4.3B × /64 | LACNIC | AR | 7th Aug 2015 |
| 2803:7280::/32 | 4.3B × /64 | LACNIC |  PA | 12th Feb 2014 |
| 2803:72a0::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jul 2018 |
| 2803:72c0::/32 | 4.3B × /64 | LACNIC | AR | 6th Jan 2017 |
| 2803:72d0::/32 | 4.3B × /64 | LACNIC | VE | 28th Feb 2025 |
| 2803:72e0::/32 | 4.3B × /64 | LACNIC | AR | 6th Feb 2020 |
| 2803:730::/32 | 4.3B × /64 | LACNIC | CO | 31st Aug 2026 |
| 2803:7320::/32 | 4.3B × /64 | LACNIC | AR | 15th Feb 2018 |
| 2803:7330::/32 | 4.3B × /64 | LACNIC | DO | 11th Aug 2026 |
| 2803:7340::/32 | 4.3B × /64 | LACNIC | AR | 6th May 2016 |
| 2803:73c0::/32 | 4.3B × /64 | LACNIC | AR | 9th Jun 2017 |
| 2803:73d0::/32 | 4.3B × /64 | LACNIC | AR | 29th Sept 2025 |
| 2803:73e0::/32 | 4.3B × /64 | LACNIC | AR | 31st Jul 2020 |
| 2803:7400::/32 | 4.3B × /64 | LACNIC | AR | 12th Apr 2012 |
| 2803:7410::/32 | 4.3B × /64 | LACNIC | PE | 23rd Feb 2021 |
| 2803:7440::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jun 2015 |
| 2803:7460::/32 | 4.3B × /64 | LACNIC | AR | 2nd May 2019 |
| 2803:7480::/32 | 4.3B × /64 | LACNIC | AR | 14th Nov 2013 |
| 2803:74c0::/32 | 4.3B × /64 | LACNIC |  PY | 6th Nov 2016 |