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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,458 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2001:df6:bb00::/48 | 65.5k × /64 | APNIC |  SG | 20th Sept 2018 |
| 2001:df6:bb40::/48 | 65.5k × /64 | APNIC |  IN | 18th Feb 2026 |
| 2001:df6:bc00::/48 | 65.5k × /64 | APNIC |  HK | 16th Oct 2015 |
| 2001:df6:bc0::/48 | 65.5k × /64 | APNIC |  ID | 27th Aug 2025 |
| 2001:df6:bc40::/48 | 65.5k × /64 | APNIC | ID | 19th Feb 2026 |
| 2001:df6:bc80::/48 | 65.5k × /64 | APNIC |  KH | 31st May 2021 |
| 2001:df6:bcc0::/48 | 65.5k × /64 | APNIC | ID | 20th Feb 2026 |
| 2001:df6:bd80::/48 | 65.5k × /64 | APNIC |  BD | 31st May 2021 |
| 2001:df6:bdc0::/48 | 65.5k × /64 | APNIC | IN | 22nd Feb 2026 |
| 2001:df6:be00::/48 | 65.5k × /64 | APNIC |  NZ | 23rd Nov 2016 |
| 2001:df6:be40::/48 | 65.5k × /64 | APNIC | BD | 22nd Feb 2026 |
| 2001:df6:bec0::/48 | 65.5k × /64 | APNIC | BD | 23rd Feb 2026 |
| 2001:df6:bf00::/48 | 65.5k × /64 | APNIC | ID | 21st Sept 2018 |
| 2001:df6:bf80::/48 | 65.5k × /64 | APNIC |  VN | 1st Jun 2021 |
| 2001:df6:c040::/48 | 65.5k × /64 | APNIC |  PH | 24th Feb 2026 |
| 2001:df6:c0c0::/48 | 65.5k × /64 | APNIC | IN | 24th Feb 2026 |
| 2001:df6:c100::/48 | 65.5k × /64 | APNIC | ID | 21st Sept 2018 |
| 2001:df6:c180::/48 | 65.5k × /64 | APNIC |  MY | 3rd Jun 2021 |
| 2001:df6:c1c0::/48 | 65.5k × /64 | APNIC |  AU | 25th Feb 2026 |
| 2001:df6:c200::/48 | 65.5k × /64 | APNIC | AU | 23rd Nov 2016 |
| 2001:df6:c240::/48 | 65.5k × /64 | APNIC |  MM | 25th Feb 2026 |
| 2001:df6:c280::/48 | 65.5k × /64 | APNIC |  NP | 3rd Jun 2021 |
| 2001:df6:c2c0::/48 | 65.5k × /64 | APNIC | ID | 25th Feb 2026 |
| 2001:df6:c300::/48 | 65.5k × /64 | APNIC | ID | 21st Sept 2018 |
| 2001:df6:c380::/48 | 65.5k × /64 | APNIC | NP | 4th Jun 2021 |
| 2001:df6:c440::/48 | 65.5k × /64 | APNIC | ID | 27th Feb 2026 |
| 2001:df6:c4c0::/48 | 65.5k × /64 | APNIC | IN | 27th Feb 2026 |
| 2001:df6:c500::/48 | 65.5k × /64 | APNIC | AU | 24th Sept 2018 |
| 2001:df6:c5c0::/48 | 65.5k × /64 | APNIC | IN | 2nd Mar 2026 |
| 2001:df6:c600::/48 | 65.5k × /64 | APNIC | BD | 23rd Nov 2016 |
| 2001:df6:c6c0::/48 | 65.5k × /64 | APNIC |  PK | 3rd Mar 2026 |
| 2001:df6:c740::/48 | 65.5k × /64 | APNIC | PH | 4th Mar 2026 |
| 2001:df6:c780::/48 | 65.5k × /64 | APNIC | PH | 8th Jun 2021 |
| 2001:df6:c7c0::/48 | 65.5k × /64 | APNIC | PK | 4th Mar 2026 |
| 2001:df6:c801::/48 | 65.5k × /64 | APNIC | IN | 9th Nov 2016 |
| 2001:df6:c80::/48 | 65.5k × /64 | APNIC | IN | 22nd Feb 2021 |
| 2001:df6:c8c0::/48 | 65.5k × /64 | APNIC | ID | 5th Mar 2026 |
| 2001:df6:c940::/48 | 65.5k × /64 | APNIC | ID | 5th Mar 2026 |
| 2001:df6:c980::/48 | 65.5k × /64 | APNIC |  MN | 10th Jun 2021 |
| 2001:df6:c9c0::/48 | 65.5k × /64 | APNIC | ID | 6th Mar 2026 |
| 2001:df6:ca40::/48 | 65.5k × /64 | APNIC | BD | 6th Mar 2026 |
| 2001:df6:ca80::/48 | 65.5k × /64 | APNIC | PH | 10th Jun 2021 |
| 2001:df6:cac0::/48 | 65.5k × /64 | APNIC | ID | 6th Mar 2026 |
| 2001:df6:cb00::/48 | 65.5k × /64 | APNIC | ID | 25th Sept 2018 |
| 2001:df6:cb40::/48 | 65.5k × /64 | APNIC | MM | 6th Mar 2026 |
| 2001:df6:cb80::/48 | 65.5k × /64 | APNIC | HK | 10th Jun 2021 |
| 2001:df6:cc0::/48 | 65.5k × /64 | APNIC | ID | 28th Aug 2025 |
| 2001:df6:cc40::/48 | 65.5k × /64 | APNIC | ID | 6th Mar 2026 |
| 2001:df6:cc80::/48 | 65.5k × /64 | APNIC | PK | 10th Jun 2021 |
| 2001:df6:ccc0::/48 | 65.5k × /64 | APNIC | ID | 6th Mar 2026 |