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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,624 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 203.2.196.0/23 | 512 | APNIC |  CN | 14th Apr 2011 |
| 203.2.209.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.2.210.0/24 | 256 | APNIC |  AU | 15th Aug 1995 |
| 203.2.212.0/23 | 512 | APNIC | AU | 11th Feb 1994 |
| 203.2.214.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.2.219.0/24 | 256 | APNIC | AU | 11th Feb 1994 |
| 203.2.226.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.2.229.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.2.230.0/24 | 256 | APNIC | AU | 25th Feb 1994 |
| 203.2.232.0/22 | 1k | APNIC | AU | 25th Feb 1994 |
| 203.2.236.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.2.73.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.2.76.0/22 | 1k | APNIC | AU | 22nd Dec 1993 |
| 203.2.96.0/20 | 4.1k | APNIC | AU | 22nd Dec 1993 |
| 203.20.105.0/24 | 256 | APNIC |  SG | 1st Aug 2005 |
| 203.20.106.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.20.115.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.117.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.118.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.20.122.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.125.0/24 | 256 | APNIC | AU | 6th Jul 2010 |
| 203.20.126.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.20.135.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.150.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.152.0/21 | 2k | APNIC |  HK | 12th Oct 1995 |
| 203.20.17.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.200.0/21 | 2k | APNIC | AU | 12th Oct 1995 |
| 203.20.230.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.232.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.236.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.252.0/22 | 1k | APNIC | AU | 17th Oct 1995 |
| 203.20.40.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.20.44.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 203.20.45.0/24 | 256 | APNIC | AU | 22nd Sept 1995 |
| 203.20.48.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.49.0/24 | 256 | APNIC | AU | 21st May 2007 |
| 203.20.56.0/24 | 256 | APNIC | AU | 26th Sept 1995 |
| 203.20.61.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.64.0/24 | 256 | APNIC | AU | 3rd Oct 1995 |
| 203.20.65.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.72.0/24 | 256 | APNIC | AU | 4th Oct 1995 |
| 203.20.84.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.20.88.0/24 | 256 | APNIC | AU | 5th Oct 1995 |
| 203.20.89.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.20.96.0/24 | 256 | APNIC | AU | 5th Oct 1995 |
| 203.20.98.0/24 | 256 | APNIC | AU | 5th Oct 1995 |
| 203.201.176.0/22 | 1k | APNIC | SG | 27th Jan 2009 |
| 203.201.180.0/24 | 256 | APNIC |  PH | 27th Jan 2009 |
| 203.201.181.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 203.201.182.0/24 | 256 | APNIC | CN | 9th Jun 2016 |