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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,392 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2001:df4:10c0::/48 | 65.5k × /64 | APNIC |  ID | 15th Jul 2024 |
| 2001:df4:1100::/48 | 65.5k × /64 | APNIC | ID | 1st Feb 2018 |
| 2001:df4:1180::/48 | 65.5k × /64 | APNIC |  NZ | 23rd Jun 2020 |
| 2001:df4:1240::/48 | 65.5k × /64 | APNIC |  VN | 16th Jul 2024 |
| 2001:df4:1300::/48 | 65.5k × /64 | APNIC | NZ | 1st Feb 2018 |
| 2001:df4:1380::/48 | 65.5k × /64 | APNIC |  BD | 25th Jun 2020 |
| 2001:df4:13c0::/48 | 65.5k × /64 | APNIC | BD | 17th Jul 2024 |
| 2001:df4:1400::/48 | 65.5k × /64 | APNIC |  AU | 15th May 2015 |
| 2001:df4:140::/48 | 65.5k × /64 | APNIC |  IN | 1st Jul 2024 |
| 2001:df4:1480::/48 | 65.5k × /64 | APNIC | BD | 25th Jun 2020 |
| 2001:df4:1540::/48 | 65.5k × /64 | APNIC | VN | 18th Jul 2024 |
| 2001:df4:15c0::/48 | 65.5k × /64 | APNIC | VN | 18th Jul 2024 |
| 2001:df4:1600::/48 | 65.5k × /64 | APNIC | IN | 17th Aug 2016 |
| 2001:df4:1640::/48 | 65.5k × /64 | APNIC | ID | 18th Jul 2024 |
| 2001:df4:1680::/48 | 65.5k × /64 | APNIC | IN | 25th Jun 2020 |
| 2001:df4:16c0::/48 | 65.5k × /64 | APNIC | ID | 18th Jul 2024 |
| 2001:df4:1740::/48 | 65.5k × /64 | APNIC | ID | 18th Jul 2024 |
| 2001:df4:17c0::/48 | 65.5k × /64 | APNIC | NZ | 22nd Jul 2024 |
| 2001:df4:180::/48 | 65.5k × /64 | APNIC |  HK | 19th Jun 2020 |
| 2001:df4:1880::/48 | 65.5k × /64 | APNIC |  CN | 28th Jun 2020 |
| 2001:df4:18c0::/48 | 65.5k × /64 | APNIC | IN | 22nd Jul 2024 |
| 2001:df4:1900::/48 | 65.5k × /64 | APNIC | ID | 4th Feb 2018 |
| 2001:df4:1940::/48 | 65.5k × /64 | APNIC |  KH | 23rd Jul 2024 |
| 2001:df4:1980::/48 | 65.5k × /64 | APNIC |  AE | 29th Jun 2020 |
| 2001:df4:19c0::/48 | 65.5k × /64 | APNIC | VN | 23rd Jul 2024 |
| 2001:df4:1a00::/48 | 65.5k × /64 | APNIC | AU | 18th Aug 2016 |
| 2001:df4:1a40::/48 | 65.5k × /64 | APNIC | IN | 23rd Jul 2024 |
| 2001:df4:1c00::/48 | 65.5k × /64 | APNIC | AU | 15th May 2015 |
| 2001:df4:1c0::/48 | 65.5k × /64 | APNIC | AU | 2nd Jul 2024 |
| 2001:df4:1c40::/48 | 65.5k × /64 | APNIC | VN | 25th Jul 2024 |
| 2001:df4:1c80::/48 | 65.5k × /64 | APNIC | AU | 30th Jun 2020 |
| 2001:df4:1cc0::/48 | 65.5k × /64 | APNIC | VN | 25th Jul 2024 |
| 2001:df4:1d00::/48 | 65.5k × /64 | APNIC | HK | 6th Feb 2018 |
| 2001:df4:1d40::/48 | 65.5k × /64 | APNIC | AU | 26th Jul 2024 |
| 2001:df4:1e40::/48 | 65.5k × /64 | APNIC |  PH | 26th Jul 2024 |
| 2001:df4:1e80::/48 | 65.5k × /64 | APNIC | IN | 1st Jul 2020 |
| 2001:df4:1ec0::/48 | 65.5k × /64 | APNIC | IN | 26th Jul 2024 |
| 2001:df4:1f00::/48 | 65.5k × /64 | APNIC | ID | 6th Feb 2018 |
| 2001:df4:1f40::/48 | 65.5k × /64 | APNIC | VN | 1st Aug 2024 |
| 2001:df4:1fc0::/48 | 65.5k × /64 | APNIC | IN | 2nd Aug 2024 |
| 2001:df4:2000::/48 | 65.5k × /64 | APNIC |  TH | 21st Jun 2013 |
| 2001:df4:200::/48 | 65.5k × /64 | APNIC | IN | 12th Aug 2016 |
| 2001:df4:201::/48 | 65.5k × /64 | APNIC | IN | 12th Aug 2019 |
| 2001:df4:2080::/48 | 65.5k × /64 | APNIC | ID | 3rd Jul 2020 |
| 2001:df4:20c0::/48 | 65.5k × /64 | APNIC | VN | 6th Aug 2024 |
| 2001:df4:2140::/48 | 65.5k × /64 | APNIC | VN | 6th Aug 2024 |
| 2001:df4:2180::/48 | 65.5k × /64 | APNIC | ID | 3rd Jul 2020 |
| 2001:df4:2240::/48 | 65.5k × /64 | APNIC | VN | 6th Aug 2024 |
| 2001:df4:2280::/48 | 65.5k × /64 | APNIC | IN | 3rd Jul 2020 |
| 2001:df4:22c0::/48 | 65.5k × /64 | APNIC | VN | 6th Aug 2024 |