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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.140.144.0/22 | 1k | APNIC |  CN | 23rd Nov 2015 |
| 202.140.148.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.140.152.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.140.156.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.140.160.0/19 | 8.2k | APNIC |  TW | 7th Apr 2011 |
| 202.142.192.0/19 | 8.2k | APNIC |  TH | 27th Nov 2003 |
| 202.142.80.0/24 | 256 | APNIC |  IN | 13th Apr 1999 |
| 202.142.82.0/24 | 256 | APNIC | IN | 13th Apr 1999 |
| 202.142.84.0/24 | 256 | APNIC | IN | 13th Apr 1999 |
| 202.142.88.0/24 | 256 | APNIC | IN | 13th Apr 1999 |
| 202.142.94.0/24 | 256 | APNIC | IN | 13th Apr 1999 |
| 202.143.104.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 202.143.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.143.4.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.143.48.0/21 | 2k | APNIC |  AU | 25th May 2005 |
| 202.143.56.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.143.8.0/21 | 2k | APNIC |  JP | 27th Apr 2005 |
| 202.144.208.0/20 | 4.1k | APNIC | TW | 26th May 2005 |
| 202.146.160.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.146.184.0/23 | 512 | APNIC | CN | 9th Oct 2023 |
| 202.146.186.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.146.188.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.146.196.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.146.200.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.146.6.0/23 | 512 | APNIC | AU | 26th Jul 2005 |
| 202.147.144.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.148.128.0/19 | 8.2k | APNIC |  SG | 5th Mar 1999 |
| 202.148.192.0/20 | 4.1k | APNIC | IN | 2nd Nov 2004 |
| 202.148.212.0/23 | 512 | APNIC | TW | 28th Jun 2005 |
| 202.148.214.0/23 | 512 | APNIC | TW | 28th Jun 2005 |
| 202.148.218.0/23 | 512 | APNIC | TW | 28th Jun 2005 |
| 202.148.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.148.64.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.149.160.0/19 | 8.2k | APNIC | CN | 8th Jul 2004 |
| 202.149.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.150.192.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.150.224.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.150.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.150.56.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.150.60.0/23 | 512 | APNIC | AU | 22nd Oct 2007 |
| 202.151.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.151.128.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 202.151.33.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.151.8.0/22 | 1k | APNIC |  ID | 29th Apr 2005 |
| 202.152.176.0/20 | 4.1k | APNIC | CN | 15th Aug 2005 |
| 202.152.208.0/20 | 4.1k | APNIC | JP | 16th Aug 2005 |
| 202.153.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.153.6.0/24 | 256 | APNIC | SG | 18th Oct 2006 |
| 202.153.7.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.155.176.0/22 | 1k | APNIC | IN | 18th Feb 2019 |