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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks in China
6,735 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 122.198.72.0/21 | 2k | APNIC |  CN | 27th Jul 2006 |
| 122.198.80.0/20 | 4.1k | APNIC | CN | 27th Jul 2006 |
| 122.198.96.0/19 | 8.2k | APNIC | CN | 27th Jul 2006 |
| 122.201.48.0/20 | 4.1k | APNIC | CN | 21st Jan 2011 |
| 122.248.24.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 122.255.64.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 122.8.192.0/18 | 16.4k | APNIC | CN | 14th Aug 2006 |
| 123.0.128.0/18 | 16.4k | APNIC | CN | 3rd Nov 2006 |
| 123.100.0.0/19 | 8.2k | APNIC | CN | 11th Jan 2007 |
| 123.137.0.0/16 | 65.5k | APNIC | CN | 28th Feb 2007 |
| 123.176.60.0/22 | 1k | APNIC | CN | 6th Jan 2011 |
| 123.176.80.0/20 | 4.1k | APNIC | CN | 20th Mar 2007 |
| 123.199.128.0/17 | 32.8k | APNIC | CN | 16th Jun 2006 |
| 123.242.0.0/17 | 32.8k | APNIC | CN | 12th Feb 2007 |
| 123.249.128.0/17 | 32.8k | APNIC | CN | 30th Jan 2007 |
| 123.253.52.0/23 | 512 | APNIC | CN | 29th Sept 2025 |
| 123.50.160.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 123.61.0.0/16 | 65.5k | APNIC | CN | 16th Jan 2007 |
| 123.62.0.0/16 | 65.5k | APNIC | CN | 16th Jan 2007 |
| 124.108.40.0/21 | 2k | APNIC | CN | 23rd Jun 2006 |
| 124.108.8.0/21 | 2k | APNIC | CN | 6th Mar 2006 |
| 124.109.96.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 124.14.24.0/21 | 2k | APNIC | CN | 10th Jan 2007 |
| 124.14.32.0/20 | 4.1k | APNIC | CN | 10th Jan 2007 |
| 124.14.48.0/22 | 1k | APNIC | CN | 10th Jan 2007 |
| 124.14.52.0/22 | 1k | APNIC | CN | 10th Jan 2007 |
| 124.14.56.0/21 | 2k | APNIC | CN | 10th Jan 2007 |
| 124.147.128.0/17 | 32.8k | APNIC | CN | 6th Mar 2006 |
| 124.15.0.0/16 | 65.5k | APNIC | CN | 10th Jan 2007 |
| 124.150.137.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 124.197.56.0/21 | 2k | APNIC | CN | 12th Apr 2006 |
| 124.20.0.0/16 | 65.5k | APNIC | CN | 30th Dec 2005 |
| 124.21.128.0/17 | 32.8k | APNIC | CN | 1st Mar 2006 |
| 124.21.32.0/19 | 8.2k | APNIC | CN | 1st Mar 2006 |
| 124.21.64.0/18 | 16.4k | APNIC | CN | 1st Mar 2006 |
| 124.242.0.0/16 | 65.5k | APNIC | CN | 2nd May 2006 |
| 124.249.0.0/16 | 65.5k | APNIC | CN | 23rd May 2006 |
| 124.40.112.0/20 | 4.1k | APNIC | CN | 24th Sept 2007 |
| 124.40.192.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 124.40.240.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 124.42.128.0/17 | 32.8k | APNIC | CN | 18th Oct 2007 |
| 124.6.64.0/18 | 16.4k | APNIC | CN | 12th Dec 2005 |
| 124.68.64.0/18 | 16.4k | APNIC | CN | 16th Aug 2006 |
| 124.69.0.0/16 | 65.5k | APNIC | CN | 16th Aug 2006 |
| 125.169.0.0/16 | 65.5k | APNIC | CN | 20th Mar 2007 |
| 125.171.0.0/16 | 65.5k | APNIC | CN | 26th Sept 2005 |
| 125.254.192.0/18 | 16.4k | APNIC | CN | 10th Jan 2007 |
| 125.31.192.0/18 | 16.4k | APNIC | CN | 27th Aug 2005 |
| 125.61.128.0/17 | 32.8k | APNIC | CN | 12th Nov 2007 |
| 125.96.0.0/15 | 131k | APNIC | CN | 22nd Aug 2005 |