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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.30.120.0/24 | 256 | APNIC |  AU | 5th Nov 2012 |
| 103.30.121.0/24 | 256 | APNIC |  SG | 7th Nov 2012 |
| 103.30.20.0/22 | 1k | APNIC |  CN | 24th Oct 2012 |
| 103.30.216.0/22 | 1k | APNIC | AU | 27th Jul 2016 |
| 103.30.228.0/22 | 1k | APNIC | CN | 15th Nov 2012 |
| 103.30.236.0/22 | 1k | APNIC | CN | 15th Nov 2012 |
| 103.30.24.0/23 | 512 | APNIC |  IN | 1st Nov 2022 |
| 103.30.240.0/22 | 1k | APNIC |  JP | 15th Nov 2012 |
| 103.30.56.0/22 | 1k | APNIC |  ID | 26th Oct 2012 |
| 103.30.96.0/22 | 1k | APNIC | CN | 1st Nov 2012 |
| 103.31.0.0/22 | 1k | APNIC | CN | 16th Nov 2012 |
| 103.31.108.0/24 | 256 | APNIC |  BD | 23rd Nov 2012 |
| 103.31.148.0/22 | 1k | APNIC | CN | 27th Nov 2012 |
| 103.31.160.0/22 | 1k | APNIC | CN | 28th Nov 2012 |
| 103.31.168.0/22 | 1k | APNIC | CN | 28th Nov 2012 |
| 103.31.172.0/22 | 1k | APNIC | SG | 28th Nov 2012 |
| 103.31.207.0/24 | 256 | APNIC | ID | 10th Dec 2012 |
| 103.31.24.0/23 | 512 | APNIC | SG | 20th Nov 2012 |
| 103.31.242.0/23 | 512 | APNIC | CN | 7th Nov 2022 |
| 103.31.252.0/22 | 1k | APNIC | JP | 3rd Dec 2012 |
| 103.31.27.0/24 | 256 | APNIC |  MY | 17th Aug 2016 |
| 103.31.32.0/23 | 512 | APNIC | ID | 21st Nov 2012 |
| 103.31.36.0/23 | 512 | APNIC | ID | 21st Nov 2012 |
| 103.31.52.0/22 | 1k | APNIC | CN | 22nd Nov 2012 |
| 103.31.56.0/22 | 1k | APNIC | CN | 22nd Nov 2012 |
| 103.31.60.0/22 | 1k | APNIC | CN | 22nd Nov 2012 |
| 103.31.64.0/22 | 1k | APNIC | CN | 22nd Nov 2012 |
| 103.31.68.0/22 | 1k | APNIC | CN | 22nd Nov 2012 |
| 103.32.0.0/22 | 1k | APNIC | CN | 12th Aug 2014 |
| 103.32.100.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.104.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.108.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.112.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.116.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.12.0/22 | 1k | APNIC | CN | 12th Aug 2014 |
| 103.32.120.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.124.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.128.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.132.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.136.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.140.0/22 | 1k | APNIC | CN | 14th Aug 2014 |
| 103.32.144.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.148.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.152.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.156.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.16.0/22 | 1k | APNIC | CN | 12th Aug 2014 |
| 103.32.160.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.164.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.168.0/22 | 1k | APNIC | CN | 15th Aug 2014 |
| 103.32.172.0/22 | 1k | APNIC | CN | 15th Aug 2014 |