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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,624 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 203.22.107.0/24 | 256 | APNIC |  AU | 23rd Nov 1995 |
| 203.22.112.0/22 | 1k | APNIC | AU | 23rd Nov 1995 |
| 203.22.122.0/23 | 512 | APNIC |  CN | 14th Apr 2011 |
| 203.22.128.0/24 | 256 | APNIC | AU | 28th Nov 1995 |
| 203.22.129.0/24 | 256 | APNIC | AU | 1st Dec 1995 |
| 203.22.130.0/24 | 256 | APNIC | AU | 1st Dec 1995 |
| 203.22.131.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.136.0/21 | 2k | APNIC | AU | 1st Dec 1995 |
| 203.22.16.0/23 | 512 | APNIC | AU | 14th Nov 1995 |
| 203.22.163.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.164.0/23 | 512 | APNIC | AU | 4th Dec 1995 |
| 203.22.166.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.170.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.176.0/21 | 2k | APNIC | CN | 14th Apr 2011 |
| 203.22.194.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.20.0/24 | 256 | APNIC | AU | 17th Nov 1995 |
| 203.22.22.0/24 | 256 | APNIC | AU | 17th Nov 1995 |
| 203.22.220.0/23 | 512 | APNIC | AU | 5th Dec 1995 |
| 203.22.222.0/24 | 256 | APNIC | AU | 16th May 2007 |
| 203.22.229.0/24 | 256 | APNIC | AU | 11th Dec 1995 |
| 203.22.23.0/24 | 256 | APNIC | AU | 17th Nov 1995 |
| 203.22.236.0/22 | 1k | APNIC | AU | 14th Dec 1995 |
| 203.22.24.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.242.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.22.245.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.246.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.25.0/24 | 256 | APNIC | AU | 17th Nov 1995 |
| 203.22.252.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.22.28.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.22.31.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.65.0/24 | 256 | APNIC | AU | 17th Nov 1995 |
| 203.22.68.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.76.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.78.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.82.0/24 | 256 | APNIC | AU | 18th Nov 1995 |
| 203.22.84.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.87.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.22.92.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 203.22.99.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.222.224.0/19 | 8.2k | APNIC |  JP | 26th Apr 2006 |
| 203.223.192.0/18 | 16.4k | APNIC |  HK | 14th Oct 2004 |
| 203.223.64.0/23 | 512 | APNIC | JP | 12th Apr 2001 |
| 203.223.66.0/23 | 512 | APNIC | JP | 13th Nov 2001 |
| 203.223.68.0/22 | 1k | APNIC | JP | 13th Nov 2001 |
| 203.223.72.0/21 | 2k | APNIC | JP | 13th Nov 2001 |
| 203.223.90.0/23 | 512 | APNIC |  ID | 27th Jun 2008 |
| 203.226.252.0/24 | 256 | APNIC |  KR | 23rd Apr 1996 |
| 203.23.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.23.100.0/24 | 256 | APNIC | AU | 17th Jan 1996 |
| 203.23.107.0/24 | 256 | APNIC | CN | 14th Apr 2011 |