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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:df3:b4c0::/48 | 65.5k × /64 | APNIC |  BD | 23rd Apr 2024 |
| 2001:df3:b500::/48 | 65.5k × /64 | APNIC |  VN | 4th Jan 2018 |
| 2001:df3:b540::/48 | 65.5k × /64 | APNIC |  AU | 23rd Apr 2024 |
| 2001:df3:b580::/48 | 65.5k × /64 | APNIC |  US | 12th May 2020 |
| 2001:df3:b600::/48 | 65.5k × /64 | APNIC |  NZ | 29th Jul 2016 |
| 2001:df3:b680::/48 | 65.5k × /64 | APNIC | AU | 13th May 2020 |
| 2001:df3:b700::/48 | 65.5k × /64 | APNIC | VN | 4th Jan 2018 |
| 2001:df3:b740::/48 | 65.5k × /64 | APNIC | BD | 24th Apr 2024 |
| 2001:df3:b780::/48 | 65.5k × /64 | APNIC |  JP | 14th May 2020 |
| 2001:df3:b7c0::/48 | 65.5k × /64 | APNIC | BD | 24th Apr 2024 |
| 2001:df3:b800::/48 | 65.5k × /64 | APNIC |  IN | 13th Mar 2014 |
| 2001:df3:b880::/48 | 65.5k × /64 | APNIC |  ID | 14th May 2020 |
| 2001:df3:b8c0::/48 | 65.5k × /64 | APNIC | BD | 25th Apr 2024 |
| 2001:df3:b900::/48 | 65.5k × /64 | APNIC |  MY | 5th Jan 2018 |
| 2001:df3:b940::/48 | 65.5k × /64 | APNIC | IN | 25th Apr 2024 |
| 2001:df3:b980::/48 | 65.5k × /64 | APNIC | ID | 14th May 2020 |
| 2001:df3:ba40::/48 | 65.5k × /64 | APNIC | BD | 25th Apr 2024 |
| 2001:df3:ba80::/48 | 65.5k × /64 | APNIC | ID | 14th May 2020 |
| 2001:df3:bac0::/48 | 65.5k × /64 | APNIC | BD | 25th Apr 2024 |
| 2001:df3:bb80::/48 | 65.5k × /64 | APNIC | BD | 15th May 2020 |
| 2001:df3:bc00::/48 | 65.5k × /64 | APNIC | JP | 23rd Apr 2015 |
| 2001:df3:bc40::/48 | 65.5k × /64 | APNIC | IN | 26th Apr 2024 |
| 2001:df3:bc81::/48 | 65.5k × /64 | APNIC |  HK | 21st May 2020 |
| 2001:df3:bcc0::/48 | 65.5k × /64 | APNIC | BD | 26th Apr 2024 |
| 2001:df3:bd00::/48 | 65.5k × /64 | APNIC | ID | 5th Jan 2018 |
| 2001:df3:bd40::/48 | 65.5k × /64 | APNIC | IN | 26th Apr 2024 |
| 2001:df3:bd80::/48 | 65.5k × /64 | APNIC |  PK | 15th May 2020 |
| 2001:df3:bdc0::/48 | 65.5k × /64 | APNIC | ID | 29th Apr 2024 |
| 2001:df3:be00::/48 | 65.5k × /64 | APNIC | BD | 3rd Aug 2016 |
| 2001:df3:be80::/48 | 65.5k × /64 | APNIC | ID | 18th May 2020 |
| 2001:df3:bec0::/48 | 65.5k × /64 | APNIC | BD | 2nd May 2024 |
| 2001:df3:bf40::/48 | 65.5k × /64 | APNIC | BD | 2nd May 2024 |
| 2001:df3:bf80::/44 | 1M × /64 | APNIC |  SG | 19th May 2020 |
| 2001:df3:bfc0::/48 | 65.5k × /64 | APNIC | IN | 2nd May 2024 |
| 2001:df3:c000::/48 | 65.5k × /64 | APNIC | ID | 11th Apr 2013 |
| 2001:df3:c00::/48 | 65.5k × /64 | APNIC | ID | 11th Mar 2015 |
| 2001:df3:c040::/48 | 65.5k × /64 | APNIC | VN | 2nd May 2024 |
| 2001:df3:c080::/48 | 65.5k × /64 | APNIC | BD | 19th May 2020 |
| 2001:df3:c0::/48 | 65.5k × /64 | APNIC | IN | 6th Oct 2023 |
| 2001:df3:c0c0::/48 | 65.5k × /64 | APNIC | ID | 6th May 2024 |
| 2001:df3:c180::/48 | 65.5k × /64 | APNIC | HK | 20th May 2020 |
| 2001:df3:c1c0::/48 | 65.5k × /64 | APNIC | ID | 6th May 2024 |
| 2001:df3:c200::/48 | 65.5k × /64 | APNIC |  TH | 4th Aug 2016 |
| 2001:df3:c2c0::/48 | 65.5k × /64 | APNIC | ID | 6th May 2024 |
| 2001:df3:c300::/48 | 65.5k × /64 | APNIC | SG | 9th Jan 2018 |
| 2001:df3:c3c0::/48 | 65.5k × /64 | APNIC | BD | 7th May 2024 |
| 2001:df3:c400::/48 | 65.5k × /64 | APNIC | AU | 23rd Apr 2015 |
| 2001:df3:c480::/48 | 65.5k × /64 | APNIC | ID | 20th May 2020 |
| 2001:df3:c500::/48 | 65.5k × /64 | APNIC | ID | 9th Jan 2018 |
| 2001:df3:c540::/48 | 65.5k × /64 | APNIC | IN | 7th May 2024 |