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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,459 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2605:9380::/32 | 4.3B × /64 | ARIN |  US | 15th Jul 2014 |
| 2605:93c0::/32 | 4.3B × /64 | ARIN | US | 13th Jan 2020 |
| 2605:9540::/32 | 4.3B × /64 | ARIN | US | 16th Jan 2020 |
| 2605:9580::/32 | 4.3B × /64 | ARIN | US | 18th Jul 2014 |
| 2605:9680::/32 | 4.3B × /64 | ARIN |  CA | 22nd Jul 2014 |
| 2605:9700::/32 | 4.3B × /64 | ARIN | US | 2nd Aug 2011 |
| 2605:97c0::/32 | 4.3B × /64 | ARIN | US | 22nd Jan 2020 |
| 2605:980::/32 | 4.3B × /64 | ARIN | US | 2nd Oct 2013 |
| 2605:98c0::/32 | 4.3B × /64 | ARIN | CA | 23rd Jan 2020 |
| 2605:9900::/32 | 4.3B × /64 | ARIN | US | 2nd Aug 2011 |
| 2605:9980::/32 | 4.3B × /64 | ARIN | US | 1st Aug 2014 |
| 2605:99c0::/32 | 4.3B × /64 | ARIN | US | 23rd Jan 2020 |
| 2605:9a80::/32 | 4.3B × /64 | ARIN | US | 7th Aug 2014 |
| 2605:9ac0::/32 | 4.3B × /64 | ARIN | US | 27th Jan 2020 |
| 2605:9b40::/32 | 4.3B × /64 | ARIN | US | 29th Jan 2020 |
| 2605:9bc0::/32 | 4.3B × /64 | ARIN | US | 30th Jan 2020 |
| 2605:9c00::/32 | 4.3B × /64 | ARIN | US | 5th Aug 2013 |
| 2605:9c80::/32 | 4.3B × /64 | ARIN | US | 11th Aug 2014 |
| 2605:9ec0::/32 | 4.3B × /64 | ARIN | US | 5th Feb 2020 |
| 2605:9f40::/32 | 4.3B × /64 | ARIN | US | 5th Feb 2020 |
| 2605:a0c0::/32 | 4.3B × /64 | ARIN | US | 10th Feb 2020 |
| 2605:a180::/32 | 4.3B × /64 | ARIN | US | 22nd Aug 2014 |
| 2605:a280::/32 | 4.3B × /64 | ARIN | US | 25th Aug 2014 |
| 2605:a300::/32 | 4.3B × /64 | ARIN | US | 8th Aug 2011 |
| 2605:a340::/32 | 4.3B × /64 | ARIN | US | 13th Feb 2020 |
| 2605:a3c0::/32 | 4.3B × /64 | ARIN | US | 13th Feb 2020 |
| 2605:a440::/32 | 4.3B × /64 | ARIN | US | 13th Feb 2020 |
| 2605:a4c0::/32 | 4.3B × /64 | ARIN | CA | 14th Feb 2020 |
| 2605:a540::/32 | 4.3B × /64 | ARIN | US | 19th Feb 2020 |
| 2605:a640::/32 | 4.3B × /64 | ARIN | US | 21st Feb 2020 |
| 2605:a6c0::/32 | 4.3B × /64 | ARIN | US | 21st Feb 2020 |
| 2605:a700::/32 | 4.3B × /64 | ARIN | US | 8th Aug 2011 |
| 2605:a740::/32 | 4.3B × /64 | ARIN | US | 21st Feb 2020 |
| 2605:a780::/32 | 4.3B × /64 | ARIN | US | 4th Sept 2014 |
| 2605:a800::/32 | 4.3B × /64 | ARIN | US | 10th May 2010 |
| 2605:a940::/32 | 4.3B × /64 | ARIN | US | 27th Feb 2020 |
| 2605:a980::/32 | 4.3B × /64 | ARIN | US | 5th Sept 2014 |
| 2605:a9c0::/32 | 4.3B × /64 | ARIN | US | 27th Feb 2020 |
| 2605:aa00::/32 | 4.3B × /64 | ARIN | US | 20th Jan 2011 |
| 2605:ac0::/32 | 4.3B × /64 | ARIN | US | 16th Nov 2018 |
| 2605:ac40::/32 | 4.3B × /64 | ARIN | CA | 4th Mar 2020 |
| 2605:acc0::/32 | 4.3B × /64 | ARIN | US | 5th Mar 2020 |
| 2605:ad00::/32 | 4.3B × /64 | ARIN | US | 10th Aug 2011 |
| 2605:aec0::/32 | 4.3B × /64 | ARIN | US | 10th Mar 2020 |
| 2605:af80::/32 | 4.3B × /64 | ARIN | US | 24th Sept 2014 |
| 2605:afc0::/32 | 4.3B × /64 | ARIN | US | 13th Mar 2020 |
| 2605:b0c0::/32 | 4.3B × /64 | ARIN | US | 16th Mar 2020 |
| 2605:b200::/32 | 4.3B × /64 | ARIN | US | 25th Jan 2011 |
| 2605:b2c0::/32 | 4.3B × /64 | ARIN | US | 27th Mar 2020 |
| 2605:b480::/32 | 4.3B × /64 | ARIN | CA | 13th Oct 2014 |