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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,493 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 202.127.128.0/20 | 4.1k | APNIC |  CN | 12th Apr 2011 |
| 202.127.194.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.127.196.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.127.212.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.127.216.0/21 | 2k | APNIC | CN | 17th Dec 1994 |
| 202.128.103.0/24 | 256 | APNIC |  AU | 9th Jun 2010 |
| 202.129.208.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.129.215.0/24 | 256 | APNIC |  IN | 5th Aug 2008 |
| 202.129.216.0/23 | 512 | APNIC |  ID | 6th Aug 2008 |
| 202.129.237.0/24 | 256 | APNIC | AU | 20th Aug 2008 |
| 202.130.195.0/24 | 256 | APNIC | AU | 20th Oct 2010 |
| 202.130.207.0/24 | 256 | APNIC | AU | 20th Oct 2010 |
| 202.130.36.0/23 | 512 | APNIC |  VN | 2nd Apr 2009 |
| 202.130.39.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.130.40.0/22 | 1k | APNIC | IN | 3rd Apr 2009 |
| 202.130.48.0/22 | 1k | APNIC | AU | 8th Apr 2009 |
| 202.131.16.0/21 | 2k | APNIC | CN | 17th Mar 2005 |
| 202.131.208.0/20 | 4.1k | APNIC | CN | 10th Apr 2001 |
| 202.131.8.0/21 | 2k | APNIC |  JP | 15th Apr 2005 |
| 202.131.80.0/21 | 2k | APNIC |  KH | 18th Mar 2005 |
| 202.133.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.133.84.0/22 | 1k | APNIC |  MM | 7th Dec 2015 |
| 202.134.128.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.134.208.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.134.212.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.134.216.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.134.220.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.134.48.0/24 | 256 | APNIC |  NZ | 28th Oct 2009 |
| 202.134.55.0/24 | 256 | APNIC | AU | 9th Nov 2009 |
| 202.134.58.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.136.224.0/20 | 4.1k | APNIC | CN | 19th Apr 2005 |
| 202.136.248.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.136.80.0/23 | 512 | APNIC | CN | 2nd Sept 2025 |
| 202.137.231.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.138.80.0/20 | 4.1k | APNIC | JP | 17th May 2005 |
| 202.139.224.0/19 | 8.2k | APNIC |  SG | 17th Jun 1997 |
| 202.14.104.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.14.106.0/24 | 256 | APNIC | NZ | 11th Aug 1993 |
| 202.14.108.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.14.111.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.14.114.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.14.118.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.14.124.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.14.127.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.14.128.0/24 | 256 | APNIC | AU | 28th Jun 1993 |
| 202.14.129.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.14.134.0/24 | 256 | APNIC | AU | 29th Jun 1993 |
| 202.14.135.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.14.136.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.14.138.0/23 | 512 | APNIC | AU | 8th Jul 1993 |