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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:c580::/48 | 65.5k × /64 | APNIC |  AU | 20th May 2020 |
| 2001:df3:c5c0::/48 | 65.5k × /64 | APNIC |  IN | 7th May 2024 |
| 2001:df3:c600::/48 | 65.5k × /64 | APNIC | AU | 4th Aug 2016 |
| 2001:df3:c680::/48 | 65.5k × /64 | APNIC |  CN | 21st May 2020 |
| 2001:df3:c6c0::/48 | 65.5k × /64 | APNIC |  ID | 8th May 2024 |
| 2001:df3:c740::/48 | 65.5k × /64 | APNIC |  BD | 8th May 2024 |
| 2001:df3:c7c0::/48 | 65.5k × /64 | APNIC | IN | 8th May 2024 |
| 2001:df3:c80::/48 | 65.5k × /64 | APNIC |  PK | 5th Mar 2020 |
| 2001:df3:c880::/48 | 65.5k × /64 | APNIC |  PG | 21st May 2020 |
| 2001:df3:c900::/48 | 65.5k × /64 | APNIC | ID | 10th Jan 2018 |
| 2001:df3:c980::/48 | 65.5k × /64 | APNIC | ID | 22nd May 2020 |
| 2001:df3:ca00::/48 | 65.5k × /64 | APNIC | ID | 4th Aug 2016 |
| 2001:df3:ca40::/48 | 65.5k × /64 | APNIC | IN | 10th May 2024 |
| 2001:df3:ca80::/48 | 65.5k × /64 | APNIC | ID | 22nd May 2020 |
| 2001:df3:cb00::/48 | 65.5k × /64 | APNIC | ID | 10th Jan 2018 |
| 2001:df3:cb40::/48 | 65.5k × /64 | APNIC | IN | 10th May 2024 |
| 2001:df3:cb80::/48 | 65.5k × /64 | APNIC | BD | 24th May 2020 |
| 2001:df3:cc0::/48 | 65.5k × /64 | APNIC | PK | 18th Oct 2023 |
| 2001:df3:cc40::/48 | 65.5k × /64 | APNIC | BD | 13th May 2024 |
| 2001:df3:cc80::/48 | 65.5k × /64 | APNIC | BD | 25th May 2020 |
| 2001:df3:ccc0::/48 | 65.5k × /64 | APNIC | BD | 13th May 2024 |
| 2001:df3:cd00::/48 | 65.5k × /64 | APNIC |  HK | 11th Jan 2018 |
| 2001:df3:cd40::/48 | 65.5k × /64 | APNIC | IN | 13th May 2024 |
| 2001:df3:cd80::/48 | 65.5k × /64 | APNIC | HK | 25th May 2020 |
| 2001:df3:ce00::/48 | 65.5k × /64 | APNIC |  MM | 4th Aug 2016 |
| 2001:df3:ce40::/48 | 65.5k × /64 | APNIC | AU | 14th May 2024 |
| 2001:df3:ce80::/48 | 65.5k × /64 | APNIC | AU | 26th May 2020 |
| 2001:df3:cec0::/48 | 65.5k × /64 | APNIC | BD | 14th May 2024 |
| 2001:df3:cf00::/48 | 65.5k × /64 | APNIC | ID | 11th Jan 2018 |
| 2001:df3:cf80::/48 | 65.5k × /64 | APNIC | AU | 26th May 2020 |
| 2001:df3:cfc0::/48 | 65.5k × /64 | APNIC | ID | 14th May 2024 |
| 2001:df3:d040::/48 | 65.5k × /64 | APNIC | BD | 15th May 2024 |
| 2001:df3:d080::/48 | 65.5k × /64 | APNIC |  SG | 26th May 2020 |
| 2001:df3:d0c0::/48 | 65.5k × /64 | APNIC | CN | 16th May 2024 |
| 2001:df3:d100::/48 | 65.5k × /64 | APNIC |  MY | 12th Jan 2018 |
| 2001:df3:d140::/48 | 65.5k × /64 | APNIC | BD | 16th May 2024 |
| 2001:df3:d180::/48 | 65.5k × /64 | APNIC | ID | 26th May 2020 |
| 2001:df3:d280::/48 | 65.5k × /64 | APNIC | BD | 27th May 2020 |
| 2001:df3:d3c0::/48 | 65.5k × /64 | APNIC | ID | 17th May 2024 |
| 2001:df3:d400::/48 | 65.5k × /64 | APNIC | AU | 28th Apr 2015 |
| 2001:df3:d440::/48 | 65.5k × /64 | APNIC | ID | 17th May 2024 |
| 2001:df3:d480::/48 | 65.5k × /64 | APNIC | ID | 29th May 2020 |
| 2001:df3:d580::/48 | 65.5k × /64 | APNIC | ID | 29th May 2020 |
| 2001:df3:d640::/48 | 65.5k × /64 | APNIC | IN | 22nd May 2024 |
| 2001:df3:d680::/48 | 65.5k × /64 | APNIC | BD | 29th May 2020 |
| 2001:df3:d780::/48 | 65.5k × /64 | APNIC | MY | 1st Jun 2020 |
| 2001:df3:d840::/48 | 65.5k × /64 | APNIC | PG | 27th May 2024 |
| 2001:df3:d900::/48 | 65.5k × /64 | APNIC | ID | 15th Jan 2018 |
| 2001:df3:d980::/48 | 65.5k × /64 | APNIC | IN | 1st Jun 2020 |
| 2001:df3:d9c0::/48 | 65.5k × /64 | APNIC |  KR | 28th May 2024 |