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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:df4:2300::/48 | 65.5k × /64 | APNIC |  ID | 8th Feb 2018 |
| 2001:df4:2380::/48 | 65.5k × /64 | APNIC | ID | 3rd Jul 2020 |
| 2001:df4:2400::/48 | 65.5k × /64 | APNIC |  AU | 22nd May 2015 |
| 2001:df4:240::/48 | 65.5k × /64 | APNIC | ID | 2nd Jul 2024 |
| 2001:df4:24c0::/48 | 65.5k × /64 | APNIC |  VN | 9th Aug 2024 |
| 2001:df4:2500::/48 | 65.5k × /64 | APNIC | ID | 8th Feb 2018 |
| 2001:df4:2580::/48 | 65.5k × /64 | APNIC | AU | 5th Jul 2020 |
| 2001:df4:25c0::/48 | 65.5k × /64 | APNIC | VN | 9th Aug 2024 |
| 2001:df4:2640::/48 | 65.5k × /64 | APNIC | VN | 9th Aug 2024 |
| 2001:df4:2680::/48 | 65.5k × /64 | APNIC | ID | 6th Jul 2020 |
| 2001:df4:2700::/48 | 65.5k × /64 | APNIC | ID | 8th Feb 2018 |
| 2001:df4:2740::/48 | 65.5k × /64 | APNIC | AU | 12th Aug 2024 |
| 2001:df4:2780::/48 | 65.5k × /64 | APNIC |  CN | 6th Jul 2020 |
| 2001:df4:27c0::/48 | 65.5k × /64 | APNIC |  IN | 12th Aug 2024 |
| 2001:df4:280::/48 | 65.5k × /64 | APNIC | ID | 19th Jun 2020 |
| 2001:df4:2840::/48 | 65.5k × /64 | APNIC |  PK | 13th Aug 2024 |
| 2001:df4:28c0::/48 | 65.5k × /64 | APNIC | VN | 13th Aug 2024 |
| 2001:df4:29c0::/48 | 65.5k × /64 | APNIC |  BD | 14th Aug 2024 |
| 2001:df4:2a80::/48 | 65.5k × /64 | APNIC | ID | 8th Jul 2020 |
| 2001:df4:2b00::/48 | 65.5k × /64 | APNIC | VN | 8th Feb 2018 |
| 2001:df4:2b80::/48 | 65.5k × /64 | APNIC | BD | 9th Jul 2020 |
| 2001:df4:2c0::/48 | 65.5k × /64 | APNIC | VN | 3rd Jul 2024 |
| 2001:df4:2cc0::/48 | 65.5k × /64 | APNIC | IN | 16th Aug 2024 |
| 2001:df4:2d40::/48 | 65.5k × /64 | APNIC | VN | 20th Aug 2024 |
| 2001:df4:2dc0::/48 | 65.5k × /64 | APNIC | VN | 20th Aug 2024 |
| 2001:df4:2e00::/48 | 65.5k × /64 | APNIC | BD | 24th Aug 2016 |
| 2001:df4:2e40::/48 | 65.5k × /64 | APNIC | VN | 20th Aug 2024 |
| 2001:df4:2e80::/48 | 65.5k × /64 | APNIC | CN | 10th Jul 2020 |
| 2001:df4:3000::/48 | 65.5k × /64 | APNIC |  TH | 27th Sept 2013 |
| 2001:df4:300::/48 | 65.5k × /64 | APNIC | AU | 29th Jan 2018 |
| 2001:df4:3040::/48 | 65.5k × /64 | APNIC | VN | 20th Aug 2024 |
| 2001:df4:3080::/48 | 65.5k × /64 | APNIC | ID | 10th Jul 2020 |
| 2001:df4:30c0::/48 | 65.5k × /64 | APNIC |  PH | 20th Aug 2024 |
| 2001:df4:3140::/48 | 65.5k × /64 | APNIC | VN | 20th Aug 2024 |
| 2001:df4:3180::/48 | 65.5k × /64 | APNIC |  MY | 10th Jul 2020 |
| 2001:df4:31c0::/48 | 65.5k × /64 | APNIC | BD | 21st Aug 2024 |
| 2001:df4:3200::/48 | 65.5k × /64 | APNIC | AU | 25th Aug 2016 |
| 2001:df4:3280::/48 | 65.5k × /64 | APNIC |  GB | 13th Jul 2020 |
| 2001:df4:3340::/48 | 65.5k × /64 | APNIC | BD | 22nd Aug 2024 |
| 2001:df4:3380::/48 | 65.5k × /64 | APNIC | BD | 13th Jul 2020 |
| 2001:df4:34c0::/48 | 65.5k × /64 | APNIC |  MM | 26th Aug 2024 |
| 2001:df4:3540::/48 | 65.5k × /64 | APNIC | BD | 26th Aug 2024 |
| 2001:df4:3580::/48 | 65.5k × /64 | APNIC |  SG | 13th Jul 2020 |
| 2001:df4:35c0::/48 | 65.5k × /64 | APNIC | VN | 27th Aug 2024 |
| 2001:df4:3600::/48 | 65.5k × /64 | APNIC | AU | 25th Aug 2016 |
| 2001:df4:3640::/48 | 65.5k × /64 | APNIC | VN | 27th Aug 2024 |
| 2001:df4:36c0::/48 | 65.5k × /64 | APNIC | VN | 27th Aug 2024 |
| 2001:df4:3700::/48 | 65.5k × /64 | APNIC |  HK | 12th Feb 2018 |
| 2001:df4:3740::/48 | 65.5k × /64 | APNIC | VN | 27th Aug 2024 |
| 2001:df4:3780::/48 | 65.5k × /64 | APNIC | AU | 13th Jul 2020 |