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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:df5:bec0::/48 | 65.5k × /64 | APNIC |  BD | 18th Jun 2025 |
| 2001:df5:bf00::/48 | 65.5k × /64 | APNIC |  ID | 4th Jul 2018 |
| 2001:df5:bf80::/48 | 65.5k × /64 | APNIC |  IN | 6th Jan 2021 |
| 2001:df5:bfc0::/48 | 65.5k × /64 | APNIC | ID | 19th Jun 2025 |
| 2001:df5:c00::/48 | 65.5k × /64 | APNIC |  NZ | 24th Jul 2015 |
| 2001:df5:c0::/48 | 65.5k × /64 | APNIC | BD | 28th Jan 2025 |
| 2001:df5:c0c0::/48 | 65.5k × /64 | APNIC | BD | 19th Jun 2025 |
| 2001:df5:c140::/48 | 65.5k × /64 | APNIC | ID | 19th Jun 2025 |
| 2001:df5:c180::/48 | 65.5k × /64 | APNIC | BD | 7th Jan 2021 |
| 2001:df5:c1c0::/48 | 65.5k × /64 | APNIC |  VN | 19th Jun 2025 |
| 2001:df5:c200::/48 | 65.5k × /64 | APNIC | VN | 17th Oct 2016 |
| 2001:df5:c240::/48 | 65.5k × /64 | APNIC | VN | 19th Jun 2025 |
| 2001:df5:c2c0::/48 | 65.5k × /64 | APNIC | VN | 19th Jun 2025 |
| 2001:df5:c340::/48 | 65.5k × /64 | APNIC | VN | 19th Jun 2025 |
| 2001:df5:c3c0::/48 | 65.5k × /64 | APNIC | VN | 19th Jun 2025 |
| 2001:df5:c400::/48 | 65.5k × /64 | APNIC |  TH | 1st Sept 2015 |
| 2001:df5:c40::/48 | 65.5k × /64 | APNIC | IN | 6th Feb 2025 |
| 2001:df5:c440::/48 | 65.5k × /64 | APNIC | VN | 19th Jun 2025 |
| 2001:df5:c480::/48 | 65.5k × /64 | APNIC |  MY | 8th Jan 2021 |
| 2001:df5:c4c0::/48 | 65.5k × /64 | APNIC | IN | 20th Jun 2025 |
| 2001:df5:c500::/48 | 65.5k × /64 | APNIC | IN | 9th Jul 2018 |
| 2001:df5:c580::/48 | 65.5k × /64 | APNIC | NZ | 10th Jan 2021 |
| 2001:df5:c5c0::/48 | 65.5k × /64 | APNIC | BD | 23rd Jun 2025 |
| 2001:df5:c640::/48 | 65.5k × /64 | APNIC |  PH | 23rd Jun 2025 |
| 2001:df5:c6c0::/48 | 65.5k × /64 | APNIC | ID | 24th Jun 2025 |
| 2001:df5:c700::/48 | 65.5k × /64 | APNIC | NZ | 9th Jul 2018 |
| 2001:df5:c740::/48 | 65.5k × /64 | APNIC | ID | 24th Jun 2025 |
| 2001:df5:c7c0::/48 | 65.5k × /64 | APNIC |  KR | 24th Jun 2025 |
| 2001:df5:c80::/48 | 65.5k × /64 | APNIC | ID | 9th Oct 2020 |
| 2001:df5:c840::/48 | 65.5k × /64 | APNIC | IN | 24th Jun 2025 |
| 2001:df5:c880::/48 | 65.5k × /64 | APNIC | BD | 11th Jan 2021 |
| 2001:df5:c900::/48 | 65.5k × /64 | APNIC | ID | 10th Jul 2018 |
| 2001:df5:ca00::/48 | 65.5k × /64 | APNIC | TH | 18th Oct 2016 |
| 2001:df5:ca40::/48 | 65.5k × /64 | APNIC | BD | 26th Jun 2025 |
| 2001:df5:ca80::/48 | 65.5k × /64 | APNIC |  HK | 12th Jan 2021 |
| 2001:df5:cac0::/48 | 65.5k × /64 | APNIC | ID | 27th Jun 2025 |
| 2001:df5:cb00::/48 | 65.5k × /64 | APNIC |  AU | 11th Jul 2018 |
| 2001:df5:cb40::/48 | 65.5k × /64 | APNIC | ID | 27th Jun 2025 |
| 2001:df5:cb80::/48 | 65.5k × /64 | APNIC | MY | 12th Jan 2021 |
| 2001:df5:cc00::/48 | 65.5k × /64 | APNIC | AU | 2nd Sept 2015 |
| 2001:df5:cc0::/48 | 65.5k × /64 | APNIC | IN | 6th Feb 2025 |
| 2001:df5:cc40::/48 | 65.5k × /64 | APNIC | VN | 30th Jun 2025 |
| 2001:df5:ccc0::/48 | 65.5k × /64 | APNIC | BD | 1st Jul 2025 |
| 2001:df5:cd80::/48 | 65.5k × /64 | APNIC | VN | 13th Jan 2021 |
| 2001:df5:ce00::/48 | 65.5k × /64 | APNIC | AU | 18th Oct 2016 |
| 2001:df5:ce40::/48 | 65.5k × /64 | APNIC | PH | 1st Jul 2025 |
| 2001:df5:ce80::/48 | 65.5k × /64 | APNIC | BD | 13th Jan 2021 |
| 2001:df5:cec0::/48 | 65.5k × /64 | APNIC | IN | 2nd Jul 2025 |
| 2001:df5:cf40::/48 | 65.5k × /64 | APNIC | BD | 2nd Jul 2025 |
| 2001:df5:cf80::/48 | 65.5k × /64 | APNIC |  SG | 14th Jan 2021 |