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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks in Vietnam
827 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2401:3520::/32 | 4.3B × /64 | APNIC |  VN | 8th Sept 2023 |
| 2401:3560::/32 | 4.3B × /64 | APNIC | VN | 8th Sept 2023 |
| 2401:35a0::/32 | 4.3B × /64 | APNIC | VN | 12th Sept 2023 |
| 2401:35e0::/32 | 4.3B × /64 | APNIC | VN | 12th Sept 2023 |
| 2401:3720::/32 | 4.3B × /64 | APNIC | VN | 12th Sept 2023 |
| 2401:3820::/32 | 4.3B × /64 | APNIC | VN | 12th Sept 2023 |
| 2401:38a0::/32 | 4.3B × /64 | APNIC | VN | 13th Sept 2023 |
| 2401:3d60::/32 | 4.3B × /64 | APNIC | VN | 27th Sept 2023 |
| 2401:3da0::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:3de0::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:3e20::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:3e60::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:3ea0::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:3ee0::/32 | 4.3B × /64 | APNIC | VN | 28th Sept 2023 |
| 2401:4120::/32 | 4.3B × /64 | APNIC | VN | 3rd Oct 2023 |
| 2401:44e0::/32 | 4.3B × /64 | APNIC | VN | 12th Oct 2023 |
| 2401:4660::/32 | 4.3B × /64 | APNIC | VN | 16th Oct 2023 |
| 2401:48a0::/32 | 4.3B × /64 | APNIC | VN | 23rd Oct 2023 |
| 2401:4b60::/32 | 4.3B × /64 | APNIC | VN | 27th Oct 2023 |
| 2401:4de0::/32 | 4.3B × /64 | APNIC | VN | 9th Nov 2023 |
| 2401:4e20::/32 | 4.3B × /64 | APNIC | VN | 9th Nov 2023 |
| 2401:5120::/32 | 4.3B × /64 | APNIC | VN | 16th Nov 2023 |
| 2401:520::/32 | 4.3B × /64 | APNIC | VN | 31st May 2023 |
| 2401:5320::/32 | 4.3B × /64 | APNIC | VN | 27th Nov 2023 |
| 2401:5360::/32 | 4.3B × /64 | APNIC | VN | 27th Nov 2023 |
| 2401:53e0::/32 | 4.3B × /64 | APNIC | VN | 27th Nov 2023 |
| 2401:57e0::/32 | 4.3B × /64 | APNIC | VN | 7th Dec 2023 |
| 2401:5820::/32 | 4.3B × /64 | APNIC | VN | 7th Dec 2023 |
| 2401:5b20::/32 | 4.3B × /64 | APNIC | VN | 15th Dec 2023 |
| 2401:5ce0::/32 | 4.3B × /64 | APNIC | VN | 20th Dec 2023 |
| 2401:5e20::/32 | 4.3B × /64 | APNIC | VN | 27th Dec 2023 |
| 2401:7160::/32 | 4.3B × /64 | APNIC | VN | 3rd Jan 2024 |
| 2401:71a0::/32 | 4.3B × /64 | APNIC | VN | 3rd Jan 2024 |
| 2401:7220::/32 | 4.3B × /64 | APNIC | VN | 3rd Jan 2024 |
| 2401:7260::/32 | 4.3B × /64 | APNIC | VN | 3rd Jan 2024 |
| 2401:75e0::/32 | 4.3B × /64 | APNIC | VN | 15th Jan 2024 |
| 2401:77a0::/32 | 4.3B × /64 | APNIC | VN | 17th Jan 2024 |
| 2401:7be0::/32 | 4.3B × /64 | APNIC | VN | 31st Jan 2024 |
| 2401:7c20::/32 | 4.3B × /64 | APNIC | VN | 31st Jan 2024 |
| 2401:8e60::/32 | 4.3B × /64 | APNIC | VN | 28th Mar 2024 |
| 2401:8f60::/32 | 4.3B × /64 | APNIC | VN | 31st Mar 2024 |
| 2401:9360::/32 | 4.3B × /64 | APNIC | VN | 11th Apr 2024 |
| 2401:9560::/32 | 4.3B × /64 | APNIC | VN | 17th Apr 2024 |
| 2401:98e0::/32 | 4.3B × /64 | APNIC | VN | 2nd May 2024 |
| 2401:99a0::/32 | 4.3B × /64 | APNIC | VN | 6th May 2024 |
| 2401:99e0::/32 | 4.3B × /64 | APNIC | VN | 6th May 2024 |
| 2401:9aa0::/32 | 4.3B × /64 | APNIC | VN | 6th May 2024 |
| 2401:9ae0::/32 | 4.3B × /64 | APNIC | VN | 6th May 2024 |
| 2401:9be0::/32 | 4.3B × /64 | APNIC | VN | 8th May 2024 |
| 2401:9c40::/32 | 4.3B × /64 | APNIC | VN | 8th Aug 2017 |