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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,783 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.176.168.0/23 | 512 | APNIC |  VN | 17th Nov 2021 |
| 103.176.192.0/23 | 512 | APNIC |  IN | 18th Nov 2021 |
| 103.176.222.0/23 | 512 | APNIC |  CN | 23rd Nov 2021 |
| 103.176.230.0/23 | 512 | APNIC | IN | 23rd Nov 2021 |
| 103.176.244.0/23 | 512 | APNIC | CN | 23rd Nov 2021 |
| 103.176.248.0/23 | 512 | APNIC |  BD | 24th Nov 2021 |
| 103.176.28.0/23 | 512 | APNIC |  ID | 10th Nov 2021 |
| 103.176.30.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.32.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.34.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.36.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.38.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.40.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.42.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.44.0/23 | 512 | APNIC | ID | 10th Nov 2021 |
| 103.176.52.0/23 | 512 | APNIC | CN | 11th Nov 2021 |
| 103.176.55.0/24 | 256 | APNIC |  PH | 12th Nov 2021 |
| 103.176.62.0/23 | 512 | APNIC | IN | 12th Nov 2021 |
| 103.176.8.0/23 | 512 | APNIC | IN | 9th Nov 2021 |
| 103.176.92.0/23 | 512 | APNIC | VN | 15th Nov 2021 |
| 103.177.152.0/24 | 256 | APNIC | ID | 3rd Dec 2021 |
| 103.177.162.0/23 | 512 | APNIC | CN | 6th Dec 2021 |
| 103.177.164.0/23 | 512 | APNIC | VN | 6th Dec 2021 |
| 103.177.174.0/23 | 512 | APNIC | IN | 6th Dec 2021 |
| 103.177.196.0/23 | 512 | APNIC |  GB | 8th Dec 2021 |
| 103.177.216.0/23 | 512 | APNIC | ID | 10th Dec 2021 |
| 103.177.22.0/23 | 512 | APNIC | IN | 24th Nov 2021 |
| 103.177.254.0/24 | 256 | APNIC | IN | 13th Dec 2021 |
| 103.177.255.0/24 | 256 | APNIC | ID | 14th Dec 2021 |
| 103.177.30.0/24 | 256 | APNIC | IN | 25th Nov 2021 |
| 103.177.34.0/23 | 512 | APNIC | VN | 25th Nov 2021 |
| 103.177.65.0/24 | 256 | APNIC |  JP | 29th Nov 2021 |
| 103.177.70.0/23 | 512 | APNIC | CN | 28th Nov 2021 |
| 103.177.86.0/23 | 512 | APNIC |  MM | 29th Nov 2021 |
| 103.177.98.0/23 | 512 | APNIC | ID | 30th Nov 2021 |
| 103.178.102.0/23 | 512 | APNIC | VN | 23rd Dec 2021 |
| 103.178.106.0/23 | 512 | APNIC | IN | 23rd Dec 2021 |
| 103.178.110.0/23 | 512 | APNIC | IN | 23rd Dec 2021 |
| 103.178.138.0/23 | 512 | APNIC | IN | 24th Dec 2021 |
| 103.178.148.0/23 | 512 | APNIC | ID | 27th Dec 2021 |
| 103.178.178.0/23 | 512 | APNIC | IN | 28th Dec 2021 |
| 103.178.184.0/23 | 512 | APNIC | IN | 28th Dec 2021 |
| 103.178.200.0/23 | 512 | APNIC | IN | 29th Dec 2021 |
| 103.178.223.0/24 | 256 | APNIC | ID | 30th Dec 2021 |
| 103.178.224.0/23 | 512 | APNIC | ID | 30th Dec 2021 |
| 103.178.228.0/23 | 512 | APNIC | VN | 30th Dec 2021 |
| 103.178.240.0/23 | 512 | APNIC | CN | 31st Dec 2021 |
| 103.178.246.0/23 | 512 | APNIC | IN | 31st Dec 2021 |
| 103.178.28.0/23 | 512 | APNIC |  LU | 16th Dec 2021 |
| 103.178.34.0/23 | 512 | APNIC |  KR | 16th Dec 2021 |