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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 59.153.184.0/22 | 1k | APNIC |  CN | 21st Oct 2015 |
| 59.153.188.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.192.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.196.0/22 | 1k | APNIC |  HK | 21st Oct 2015 |
| 59.153.212.0/22 | 1k | APNIC |  VN | 22nd Oct 2015 |
| 59.153.56.0/22 | 1k | APNIC | HK | 15th Oct 2015 |
| 59.153.60.0/22 | 1k | APNIC | CN | 15th Oct 2015 |
| 59.153.64.0/22 | 1k | APNIC | CN | 15th Oct 2015 |
| 59.153.68.0/22 | 1k | APNIC | CN | 15th Oct 2015 |
| 59.153.72.0/22 | 1k | APNIC | CN | 15th Oct 2015 |
| 59.153.76.0/22 | 1k | APNIC |  SG | 15th Oct 2015 |
| 59.155.0.0/16 | 65.5k | APNIC | CN | 20th Oct 2006 |
| 59.156.135.0/24 | 256 | APNIC |  JP | 18th Nov 2004 |
| 59.156.136.0/22 | 1k | APNIC | JP | 18th Nov 2004 |
| 59.156.140.0/22 | 1k | APNIC | JP | 18th Nov 2004 |
| 59.156.200.0/23 | 512 | APNIC | JP | 18th Nov 2004 |
| 59.156.202.0/24 | 256 | APNIC | JP | 18th Nov 2004 |
| 59.156.21.0/24 | 256 | APNIC | JP | 18th Nov 2004 |
| 59.156.22.0/23 | 512 | APNIC | JP | 18th Nov 2004 |
| 59.156.25.0/24 | 256 | APNIC | JP | 18th Nov 2004 |
| 59.156.26.0/23 | 512 | APNIC | JP | 18th Nov 2004 |
| 59.156.28.0/24 | 256 | APNIC | JP | 18th Nov 2004 |
| 59.157.208.0/20 | 4.1k | APNIC | JP | 18th Nov 2004 |
| 59.191.0.0/17 | 32.8k | APNIC | CN | 23rd Dec 2004 |
| 59.43.0.0/16 | 65.5k | APNIC | CN | 20th May 2005 |
| 59.83.0.0/17 | 32.8k | APNIC | CN | 17th Aug 2004 |
| 60.245.64.0/19 | 8.2k | APNIC |  TW | 31st Aug 2006 |
| 60.254.192.0/18 | 16.4k | APNIC | JP | 1st Sept 2006 |
| 60.55.0.0/16 | 65.5k | APNIC | CN | 2nd Aug 2004 |
| 61.101.240.0/22 | 1k | APNIC |  KR | 21st Mar 2001 |
| 61.101.248.0/21 | 2k | APNIC | KR | 21st Mar 2001 |
| 61.11.224.0/19 | 8.2k | APNIC | VN | 30th Mar 2011 |
| 61.111.192.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.111.224.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.111.96.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.14.212.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 61.14.216.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 61.14.220.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 61.14.240.0/22 | 1k | APNIC | CN | 29th Dec 2015 |
| 61.14.244.0/22 | 1k | APNIC | CN | 30th Dec 2015 |
| 61.15.128.0/17 | 32.8k | APNIC | HK | 7th Sept 2001 |
| 61.16.28.0/22 | 1k | APNIC | SG | 8th Nov 2000 |
| 61.245.104.0/22 | 1k | APNIC | JP | 21st Jul 2005 |
| 61.245.124.0/22 | 1k | APNIC | JP | 21st Jul 2005 |
| 61.248.0.0/17 | 32.8k | APNIC | KR | 21st Mar 2001 |
| 61.248.128.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.248.160.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.248.192.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.248.228.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.248.232.0/21 | 2k | APNIC | KR | 21st Mar 2001 |