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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.10.120.0/22 | 1k | APNIC |  CN | 21st Nov 2015 |
| 202.10.124.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 202.10.128.0/19 | 8.2k | APNIC |  AU | 20th Sept 1999 |
| 202.10.160.0/19 | 8.2k | APNIC | AU | 17th Apr 2000 |
| 202.10.192.0/19 | 8.2k | APNIC | AU | 17th Apr 2000 |
| 202.10.4.0/24 | 256 | APNIC | AU | 30th Apr 1997 |
| 202.10.5.0/24 | 256 | APNIC | AU | 27th Oct 1997 |
| 202.10.6.0/23 | 512 | APNIC | AU | 27th Oct 1997 |
| 202.10.8.0/22 | 1k | APNIC | AU | 27th Oct 1997 |
| 202.12.1.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.101.0/24 | 256 | APNIC |  IN | 4th May 2007 |
| 202.12.102.0/24 | 256 | APNIC | AU | 8th May 2007 |
| 202.12.106.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.107.0/24 | 256 | APNIC | AU | 23rd Feb 1999 |
| 202.12.111.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.116.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.17.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.18.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.2.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.22.0/24 | 256 | APNIC | AU | 29th Jun 1993 |
| 202.12.243.0/24 | 256 | APNIC | AU | 31st May 2016 |
| 202.12.64.0/22 | 1k | APNIC |  JP | 5th Apr 2011 |
| 202.12.72.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.75.0/24 | 256 | APNIC |  ID | 24th Jan 2011 |
| 202.12.84.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.12.86.0/24 | 256 | APNIC | AU | 12th Apr 1993 |
| 202.12.96.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.12.98.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.122.0.0/21 | 2k | APNIC | CN | 5th Nov 1994 |
| 202.122.120.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.122.132.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.122.160.0/20 | 4.1k | APNIC | ID | 12th May 2003 |
| 202.122.64.0/19 | 8.2k | APNIC | CN | 10th Aug 2004 |
| 202.123.112.0/22 | 1k | APNIC |  HK | 30th Jan 2017 |
| 202.123.116.0/22 | 1k | APNIC | CN | 25th Sept 2015 |
| 202.123.120.0/22 | 1k | APNIC | CN | 25th Sept 2015 |
| 202.123.160.0/20 | 4.1k | APNIC | HK | 3rd May 2001 |
| 202.124.16.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.124.194.0/24 | 256 | APNIC | IN | 5th Mar 2010 |
| 202.124.24.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.124.64.0/20 | 4.1k | APNIC | AU | 31st Jul 2002 |
| 202.124.80.0/20 | 4.1k | APNIC | AU | 7th May 2003 |
| 202.125.107.0/24 | 256 | APNIC | CN | 14th Apr 2010 |
| 202.125.109.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.125.112.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.125.160.0/22 | 1k | APNIC | AU | 10th Apr 2003 |
| 202.125.166.0/24 | 256 | APNIC | AU | 10th Apr 2003 |
| 202.125.93.0/24 | 256 | APNIC | AU | 1st Apr 2010 |
| 202.125.98.0/24 | 256 | APNIC | AU | 7th Apr 2010 |
| 202.127.112.0/20 | 4.1k | APNIC | CN | 11th Mar 2005 |