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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.64.232.0/22 | 1k | APNIC |  CN | 7th Jun 2016 |
| 103.64.236.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.64.240.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.64.244.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.64.248.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.64.252.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.64.32.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.36.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.4.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.40.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.44.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.48.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.52.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.56.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.60.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.64.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.68.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.72.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.76.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.80.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.84.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.88.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.92.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.64.96.0/22 | 1k | APNIC | CN | 6th Jun 2016 |
| 103.65.0.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.65.100.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.104.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.108.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.112.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.12.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.65.130.0/23 | 512 | APNIC |  JP | 11th Oct 2023 |
| 103.65.144.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.148.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.152.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.156.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.16.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.65.160.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.164.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.168.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.172.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.204.0/23 | 512 | APNIC | CN | 4th Jan 2023 |
| 103.65.206.0/23 | 512 | APNIC | CN | 5th Jan 2023 |
| 103.65.22.0/24 | 256 | APNIC |  AU | 8th Jun 2016 |
| 103.65.32.0/22 | 1k | APNIC |  IN | 7th Jun 2016 |
| 103.65.4.0/22 | 1k | APNIC | CN | 7th Jun 2016 |
| 103.65.48.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.52.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.56.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.60.0/22 | 1k | APNIC | CN | 8th Jun 2016 |
| 103.65.64.0/22 | 1k | APNIC | CN | 8th Jun 2016 |