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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.72.80.0/20 | 4.1k | APNIC |  CN | 12th Apr 2011 |
| 202.73.132.0/22 | 1k | APNIC |  KR | 14th Sept 2005 |
| 202.73.144.0/20 | 4.1k | APNIC |  AU | 11th Apr 2011 |
| 202.73.232.0/21 | 2k | APNIC |  ID | 25th Jun 2001 |
| 202.73.6.0/24 | 256 | APNIC |  BD | 12th Sept 2005 |
| 202.73.8.0/22 | 1k | APNIC |  MY | 3rd Dec 2004 |
| 202.74.252.0/24 | 256 | APNIC | AU | 17th Jun 2005 |
| 202.74.254.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.74.36.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.74.42.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.74.45.0/24 | 256 | APNIC | ID | 15th Nov 2010 |
| 202.74.47.0/24 | 256 | APNIC |  JP | 18th Nov 2010 |
| 202.74.50.0/23 | 512 | APNIC |  HK | 22nd Nov 2010 |
| 202.74.52.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.74.53.0/24 | 256 | APNIC |  IN | 22nd Nov 2010 |
| 202.74.55.0/24 | 256 | APNIC |  US | 17th Aug 2016 |
| 202.74.62.0/23 | 512 | APNIC |  SG | 30th Nov 2010 |
| 202.74.72.0/23 | 512 | APNIC | ID | 10th Feb 2006 |
| 202.74.8.0/21 | 2k | APNIC | CN | 10th Dec 2004 |
| 202.74.80.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.75.252.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.76.252.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.77.0.0/22 | 1k | APNIC | HK | 4th Jul 1995 |
| 202.77.136.0/24 | 256 | APNIC | AU | 22nd Nov 2005 |
| 202.77.137.0/24 | 256 | APNIC | IN | 1st Dec 2005 |
| 202.77.140.0/22 | 1k | APNIC | HK | 8th Oct 2002 |
| 202.77.160.0/19 | 8.2k | APNIC | HK | 8th Oct 2002 |
| 202.77.64.0/20 | 4.1k | APNIC | ID | 22nd Mar 2002 |
| 202.77.80.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.77.88.0/22 | 1k | APNIC | AU | 23rd Nov 2007 |
| 202.77.92.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.78.32.0/20 | 4.1k | APNIC | AU | 5th Jun 2002 |
| 202.78.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.79.16.0/21 | 2k | APNIC | BD | 15th Nov 2005 |
| 202.79.224.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.79.248.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.8.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.8.12.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.8.128.0/19 | 8.2k | APNIC | CN | 14th Oct 2004 |
| 202.8.192.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.8.2.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.8.24.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.8.26.0/23 | 512 | APNIC | JP | 5th Aug 2003 |
| 202.8.31.0/24 | 256 | APNIC | HK | 9th Oct 2009 |
| 202.8.4.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.8.64.0/24 | 256 | APNIC | AU | 7th Jan 2011 |
| 202.8.77.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.8.94.0/23 | 512 | APNIC | SG | 4th Nov 1997 |
| 202.8.96.0/22 | 1k | APNIC | ID | 18th Apr 2019 |
| 202.80.200.0/21 | 2k | APNIC | CN | 12th Apr 2011 |