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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Thailand
175 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 203.146.227.0/24 | 256 | APNIC |  TH | 23rd Nov 2000 |
| 203.146.24.0/24 | 256 | APNIC | TH | 19th Mar 1997 |
| 203.146.243.0/24 | 256 | APNIC | TH | 23rd Nov 2000 |
| 203.146.45.0/24 | 256 | APNIC | TH | 17th Jul 1997 |
| 203.146.74.0/24 | 256 | APNIC | TH | 3rd Dec 1998 |
| 203.146.99.0/24 | 256 | APNIC | TH | 14th Jul 1999 |
| 203.153.160.0/20 | 4.1k | APNIC | TH | 1st Sept 2005 |
| 203.153.176.0/20 | 4.1k | APNIC | TH | 13th Sept 2006 |
| 203.170.131.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.137.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.139.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.140.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.142.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.144.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.155.0/24 | 256 | APNIC | TH | 3rd Aug 2000 |
| 203.170.214.0/24 | 256 | APNIC | TH | 25th Jun 2001 |
| 203.170.225.0/24 | 256 | APNIC | TH | 25th Jun 2001 |
| 203.170.235.0/24 | 256 | APNIC | TH | 25th Jun 2001 |
| 203.172.68.0/24 | 256 | APNIC | TH | 16th Dec 2002 |
| 203.172.92.0/24 | 256 | APNIC | TH | 16th Dec 2002 |
| 203.172.94.0/24 | 256 | APNIC | TH | 16th Dec 2002 |
| 210.1.16.0/24 | 256 | APNIC | TH | 23rd Nov 2000 |
| 218.100.38.0/24 | 256 | APNIC | TH | 9th Mar 2006 |
| 218.100.66.0/24 | 256 | APNIC | TH | 18th Feb 2009 |
| 222.123.0.0/16 | 65.5k | APNIC | TH | 6th Sept 2006 |
| 223.25.192.0/19 | 8.2k | APNIC | TH | 16th Aug 2010 |
| 2400:3480::/32 | 4.3B × /64 | APNIC | TH | 18th Oct 2013 |
| 2400:5780::/32 | 4.3B × /64 | APNIC | TH | 7th Nov 2013 |
| 2400:59c0::/32 | 4.3B × /64 | APNIC | TH | 5th Dec 2016 |
| 2400:81a0::/32 | 4.3B × /64 | APNIC | TH | 26th May 2022 |
| 2400:bca0::/32 | 4.3B × /64 | APNIC | TH | 31st Oct 2022 |
| 2400:c5c0::/32 | 4.3B × /64 | APNIC | TH | 1st Mar 2017 |
| 2400:ca20::/32 | 4.3B × /64 | APNIC | TH | 9th Dec 2022 |
| 2400:f4c0::/32 | 4.3B × /64 | APNIC | TH | 10th Apr 2017 |
| 2401:1240::/32 | 4.3B × /64 | APNIC | TH | 2nd May 2017 |
| 2401:4a40::/32 | 4.3B × /64 | APNIC | TH | 8th Jun 2017 |
| 2401:500::/32 | 4.3B × /64 | APNIC | TH | 6th Jun 2011 |
| 2401:5fc0::/32 | 4.3B × /64 | APNIC | TH | 28th Jun 2017 |
| 2401:7ea0::/32 | 4.3B × /64 | APNIC | TH | 8th Feb 2024 |
| 2401:e000::/32 | 4.3B × /64 | APNIC | TH | 2nd Oct 2007 |
| 2402:4aa0::/32 | 4.3B × /64 | APNIC | TH | 23rd Jan 2026 |
| 2402:c380::/32 | 4.3B × /64 | APNIC | TH | 14th Aug 2015 |
| 2402:c980::/32 | 4.3B × /64 | APNIC | TH | 20th Aug 2015 |
| 2403:2801::/32 | 4.3B × /64 | APNIC | TH | 7th Sept 2011 |
| 2403:4c00::/32 | 4.3B × /64 | APNIC | TH | 11th Dec 2009 |
| 2403:c740::/32 | 4.3B × /64 | APNIC | TH | 17th Oct 2018 |
| 2403:d0c0::/32 | 4.3B × /64 | APNIC | TH | 24th Oct 2018 |
| 2404:1680::/32 | 4.3B × /64 | APNIC | TH | 4th Jan 2016 |
| 2404:1a00::/32 | 4.3B × /64 | APNIC | TH | 25th Aug 2010 |
| 2404:5900::/32 | 4.3B × /64 | APNIC | TH | 4th Jul 2012 |