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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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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 |
|---|---|---|---|---|
| 203.201.188.0/23 | 512 | APNIC |  MM | 11th Aug 2026 |
| 203.201.190.0/23 | 512 | APNIC |  ID | 12th Aug 2026 |
| 203.207.0.0/20 | 4.1k | APNIC |  TW | 19th Dec 2000 |
| 203.207.52.0/22 | 1k | APNIC | ID | 2nd Feb 2009 |
| 203.208.20.0/24 | 256 | APNIC |  HK | 20th Jul 2006 |
| 203.208.22.0/24 | 256 | APNIC |  SG | 15th Jun 2006 |
| 203.209.128.0/20 | 4.1k | APNIC | HK | 25th May 2001 |
| 203.209.188.0/23 | 512 | APNIC | ID | 9th Feb 2009 |
| 203.21.0.0/23 | 512 | APNIC |  CN | 14th Apr 2011 |
| 203.21.10.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.108.0/22 | 1k | APNIC |  AU | 16th Apr 2010 |
| 203.21.124.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.128.0/23 | 512 | APNIC | AU | 2nd Nov 1995 |
| 203.21.136.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 203.21.145.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.156.0/22 | 1k | APNIC | AU | 14th Nov 1995 |
| 203.21.160.0/20 | 4.1k | APNIC | AU | 10th Nov 1995 |
| 203.21.17.0/24 | 256 | APNIC | AU | 20th Oct 1995 |
| 203.21.18.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.2.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.206.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.224.0/19 | 8.2k | APNIC | AU | 14th Nov 1995 |
| 203.21.33.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.34.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.39.0/24 | 256 | APNIC | AU | 23rd Oct 1995 |
| 203.21.41.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.44.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.67.0/24 | 256 | APNIC | AU | 25th Oct 1995 |
| 203.21.68.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.69.0/24 | 256 | APNIC | AU | 25th Oct 1995 |
| 203.21.70.0/23 | 512 | APNIC | AU | 25th Oct 1995 |
| 203.21.74.0/23 | 512 | APNIC | ID | 8th Mar 2011 |
| 203.21.8.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.82.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 203.21.96.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 203.210.80.0/23 | 512 | APNIC |  IN | 13th May 2019 |
| 203.211.56.0/22 | 1k | APNIC |  PH | 25th Sept 2017 |
| 203.211.60.0/22 | 1k | APNIC | SG | 20th Jun 2008 |
| 203.212.160.0/19 | 8.2k | APNIC |  KR | 7th Feb 2006 |
| 203.212.65.0/24 | 256 | APNIC | IN | 29th Nov 2000 |
| 203.215.49.0/24 | 256 | APNIC | IN | 23rd Feb 2018 |
| 203.217.134.0/23 | 512 | APNIC | ID | 23rd Jun 2009 |
| 203.217.137.0/24 | 256 | APNIC |  US | 23rd Jun 2009 |
| 203.217.141.0/24 | 256 | APNIC | AU | 30th Jun 2009 |
| 203.217.162.0/23 | 512 | APNIC | AU | 7th Mar 2016 |
| 203.217.164.0/22 | 1k | APNIC | CN | 10th Dec 2015 |
| 203.217.174.0/24 | 256 | APNIC | IN | 10th Jul 2009 |
| 203.217.192.0/21 | 2k | APNIC | KR | 9th Aug 2006 |
| 203.217.200.0/22 | 1k | APNIC | KR | 9th Aug 2006 |
| 203.22.106.0/24 | 256 | APNIC | CN | 14th Apr 2011 |