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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 119.18.232.0/23 | 512 | APNIC |  CN | 14th Dec 2007 |
| 119.18.235.0/24 | 256 | APNIC | CN | 14th Dec 2007 |
| 119.18.240.0/20 | 4.1k | APNIC | CN | 14th Dec 2007 |
| 119.19.0.0/16 | 65.5k | APNIC | CN | 10th Dec 2007 |
| 119.2.0.0/19 | 8.2k | APNIC | CN | 22nd Nov 2007 |
| 119.224.96.0/19 | 8.2k | APNIC |  HK | 26th Feb 2008 |
| 119.232.0.0/16 | 65.5k | APNIC | CN | 29th Feb 2008 |
| 119.233.0.0/17 | 32.8k | APNIC | CN | 29th Feb 2008 |
| 119.235.0.0/22 | 1k | APNIC |  LK | 29th Feb 2008 |
| 119.235.104.0/21 | 2k | APNIC |  JP | 23rd Feb 2011 |
| 119.235.14.0/23 | 512 | APNIC | LK | 29th Feb 2008 |
| 119.235.192.0/20 | 4.1k | APNIC |  KR | 7th Mar 2008 |
| 119.252.96.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 119.27.128.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 119.27.192.0/18 | 16.4k | APNIC | CN | 17th Dec 2007 |
| 119.27.64.0/18 | 16.4k | APNIC | CN | 14th Dec 2007 |
| 119.30.48.0/20 | 4.1k | APNIC | CN | 19th Dec 2007 |
| 119.37.128.0/18 | 16.4k | APNIC | CN | 27th Dec 2007 |
| 119.38.128.0/18 | 16.4k | APNIC | CN | 27th Dec 2007 |
| 119.38.224.0/19 | 8.2k | APNIC | CN | 31st Dec 2007 |
| 119.42.128.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 119.42.192.0/19 | 8.2k | APNIC |  SG | 8th Jan 2008 |
| 119.42.44.0/22 | 1k | APNIC |  GB | 20th Jul 2016 |
| 119.43.0.0/16 | 65.5k | APNIC |  IN | 7th Jan 2008 |
| 119.44.64.0/18 | 16.4k | APNIC | CN | 3rd Jan 2008 |
| 119.47.95.0/24 | 256 | APNIC |  ID | 17th Jan 2008 |
| 119.58.0.0/16 | 65.5k | APNIC | CN | 11th Jan 2008 |
| 119.59.128.0/17 | 32.8k | APNIC | CN | 18th Jan 2008 |
| 119.63.144.0/20 | 4.1k | APNIC | JP | 23rd Feb 2011 |
| 119.63.212.0/22 | 1k | APNIC |  AU | 22nd Jan 2008 |
| 119.63.32.0/19 | 8.2k | APNIC | CN | 21st Jan 2008 |
| 119.77.0.0/18 | 16.4k | APNIC | AU | 24th Jan 2008 |
| 119.82.208.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 120.137.0.0/17 | 32.8k | APNIC | CN | 9th Apr 2008 |
| 120.138.0.0/22 | 1k | APNIC | IN | 27th Nov 2015 |
| 120.139.0.0/16 | 65.5k | APNIC |  MY | 14th Apr 2008 |
| 120.143.128.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 120.143.192.0/18 | 16.4k | APNIC | KR | 22nd Apr 2008 |
| 120.160.0.0/11 | 2.1M | APNIC | ID | 14th Apr 2008 |
| 120.29.32.0/19 | 8.2k | APNIC | AU | 14th Mar 2008 |
| 120.30.0.0/16 | 65.5k | APNIC | CN | 18th Mar 2008 |
| 120.50.184.0/21 | 2k | APNIC |  VN | 27th Mar 2008 |
| 120.51.96.0/19 | 8.2k | APNIC | SG | 20th Mar 2008 |
| 120.88.176.0/22 | 1k | APNIC | IN | 4th Mar 2011 |
| 120.88.188.0/22 | 1k | APNIC | IN | 4th Mar 2011 |
| 120.88.8.0/21 | 2k | APNIC | CN | 31st Mar 2009 |
| 120.90.0.0/15 | 131k | APNIC | CN | 28th Mar 2008 |
| 121.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.100.128.0/17 | 32.8k | APNIC | CN | 3rd Jul 2006 |
| 121.101.0.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |