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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.41.192.0/24 | 256 | APNIC |  CN | 14th Apr 2011 |
| 202.41.196.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.41.20.0/23 | 512 | APNIC |  IN | 24th Feb 1994 |
| 202.41.200.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.41.205.0/24 | 256 | APNIC | IN | 8th Mar 2004 |
| 202.41.206.0/23 | 512 | APNIC | IN | 8th Mar 2004 |
| 202.41.4.0/22 | 1k | APNIC |  AU | 29th Dec 2009 |
| 202.41.65.0/24 | 256 | APNIC | IN | 23rd Oct 1994 |
| 202.41.66.0/24 | 256 | APNIC | IN | 5th Nov 1994 |
| 202.41.67.0/24 | 256 | APNIC | IN | 8th Feb 1996 |
| 202.41.68.0/24 | 256 | APNIC | IN | 5th Nov 1994 |
| 202.41.69.0/24 | 256 | APNIC | IN | 7th Dec 1994 |
| 202.41.70.0/24 | 256 | APNIC | IN | 25th Feb 1995 |
| 202.41.72.0/22 | 1k | APNIC | IN | 29th Mar 1995 |
| 202.41.8.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.42.104.0/21 | 2k | APNIC |  JP | 9th Jul 1999 |
| 202.42.112.0/20 | 4.1k | APNIC | JP | 9th Jul 1999 |
| 202.42.136.0/24 | 256 | APNIC | JP | 9th Jul 1999 |
| 202.42.137.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.138.0/23 | 512 | APNIC | JP | 31st Jan 1994 |
| 202.42.140.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.148.0/24 | 256 | APNIC | JP | 18th Jun 1994 |
| 202.42.150.0/24 | 256 | APNIC | JP | 12th May 1994 |
| 202.42.151.0/24 | 256 | APNIC | JP | 20th May 1994 |
| 202.42.153.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.156.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.16.0/20 | 4.1k | APNIC | JP | 9th Jul 1999 |
| 202.42.160.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.162.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.164.0/24 | 256 | APNIC | JP | 11th Jul 1994 |
| 202.42.167.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.168.0/23 | 512 | APNIC | JP | 8th Sept 1999 |
| 202.42.172.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.174.0/24 | 256 | APNIC | JP | 4th Oct 1994 |
| 202.42.177.0/24 | 256 | APNIC | JP | 11th Sept 2001 |
| 202.42.178.0/23 | 512 | APNIC | JP | 11th Sept 2001 |
| 202.42.180.0/23 | 512 | APNIC | JP | 11th Sept 2001 |
| 202.42.183.0/24 | 256 | APNIC | JP | 11th Sept 2001 |
| 202.42.188.0/23 | 512 | APNIC | JP | 11th Sept 2001 |
| 202.42.202.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.204.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.214.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.216.0/23 | 512 | APNIC | JP | 8th Sept 1999 |
| 202.42.218.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.222.0/23 | 512 | APNIC | JP | 8th Sept 1999 |
| 202.42.224.0/23 | 512 | APNIC | JP | 8th Sept 1999 |
| 202.42.227.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.229.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.230.0/24 | 256 | APNIC | JP | 8th Sept 1999 |
| 202.42.232.0/24 | 256 | APNIC | JP | 8th Sept 1999 |