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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.171.233.0/24 | 256 | APNIC |  ID | 31st Jul 2009 |
| 202.171.235.0/24 | 256 | APNIC |  CN | 14th Apr 2011 |
| 202.171.237.0/24 | 256 | APNIC | ID | 5th Aug 2009 |
| 202.171.239.0/24 | 256 | APNIC |  IN | 11th Aug 2009 |
| 202.172.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.172.4.0/23 | 512 | APNIC |  VN | 25th Oct 2006 |
| 202.172.64.0/19 | 8.2k | APNIC |  JP | 13th Apr 2004 |
| 202.172.7.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.173.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.173.112.0/22 | 1k | APNIC | CN | 25th Sept 2015 |
| 202.173.6.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.174.124.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.174.16.0/20 | 4.1k | APNIC |  TW | 26th Oct 2005 |
| 202.174.64.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.174.8.0/21 | 2k | APNIC |  HK | 13th May 2005 |
| 202.176.13.0/24 | 256 | APNIC |  MY | 11th Jan 2008 |
| 202.176.14.0/24 | 256 | APNIC |  AU | 15th Jan 2008 |
| 202.176.224.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.178.0.0/19 | 8.2k | APNIC | MY | 4th Aug 1997 |
| 202.178.32.0/19 | 8.2k | APNIC | MY | 14th May 1999 |
| 202.178.64.0/20 | 4.1k | APNIC | MY | 7th Mar 2001 |
| 202.179.148.0/22 | 1k | APNIC |  KR | 19th May 2017 |
| 202.179.160.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.164.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.168.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.172.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.179.208.0/20 | 4.1k | APNIC | JP | 3rd Jun 2004 |
| 202.180.128.0/19 | 8.2k | APNIC | CN | 10th May 2005 |
| 202.180.176.0/20 | 4.1k | APNIC | JP | 11th Feb 2004 |
| 202.180.208.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.181.143.0/24 | 256 | APNIC | VN | 13th Dec 2000 |
| 202.181.32.0/19 | 8.2k | APNIC | AU | 11th Apr 2011 |
| 202.181.8.0/22 | 1k | APNIC | CN | 17th Dec 2015 |
| 202.182.192.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.182.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.182.80.0/20 | 4.1k | APNIC |  NZ | 30th Oct 1998 |
| 202.183.0.0/19 | 8.2k | APNIC | ID | 26th Mar 1997 |
| 202.183.209.0/24 | 256 | APNIC |  TH | 23rd Mar 1999 |
| 202.183.210.0/24 | 256 | APNIC | TH | 23rd Mar 1999 |
| 202.189.184.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.189.80.0/20 | 4.1k | APNIC | CN | 29th Nov 2005 |
| 202.191.0.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.191.112.0/21 | 2k | APNIC | JP | 6th Dec 2005 |
| 202.191.68.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.191.72.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.191.80.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.2.4.0/22 | 1k | APNIC | NZ | 20th Oct 1993 |
| 202.2.80.0/21 | 2k | APNIC | HK | 9th Mar 2000 |
| 202.2.92.0/22 | 1k | APNIC | AU | 4th Apr 2011 |
| 202.20.108.0/24 | 256 | APNIC | ID | 22nd Mar 2012 |