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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Taiwan
321 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 1.200.0.0/16 | 65.5k | APNIC |  TW | 7th Apr 2011 |
| 101.0.224.0/19 | 8.2k | APNIC | TW | 24th Dec 2010 |
| 103.100.164.0/22 | 1k | APNIC | TW | 8th Sept 2017 |
| 103.112.48.0/22 | 1k | APNIC | TW | 26th Mar 2018 |
| 103.117.112.0/22 | 1k | APNIC | TW | 26th Jun 2018 |
| 103.117.134.0/23 | 512 | APNIC | TW | 22nd Sept 2023 |
| 103.117.40.0/22 | 1k | APNIC | TW | 17th Jun 2018 |
| 103.118.148.0/23 | 512 | APNIC | TW | 22nd Mar 2023 |
| 103.120.148.0/22 | 1k | APNIC | TW | 6th Aug 2018 |
| 103.122.148.0/22 | 1k | APNIC | TW | 18th Sept 2018 |
| 103.122.196.0/22 | 1k | APNIC | TW | 19th Sept 2018 |
| 103.122.236.0/22 | 1k | APNIC | TW | 20th Sept 2018 |
| 103.123.124.0/22 | 1k | APNIC | TW | 27th Sept 2018 |
| 103.123.184.0/22 | 1k | APNIC | TW | 28th Sept 2018 |
| 103.123.252.0/22 | 1k | APNIC | TW | 3rd Oct 2018 |
| 103.125.64.0/22 | 1k | APNIC | TW | 14th Nov 2018 |
| 103.127.148.0/22 | 1k | APNIC | TW | 21st Dec 2018 |
| 103.129.240.0/22 | 1k | APNIC | TW | 12th Sept 2018 |
| 103.130.120.0/22 | 1k | APNIC | TW | 8th Oct 2018 |
| 103.130.20.0/22 | 1k | APNIC | TW | 3rd Oct 2018 |
| 103.130.24.0/22 | 1k | APNIC | TW | 3rd Oct 2018 |
| 103.130.32.0/20 | 4.1k | APNIC | TW | 3rd Oct 2018 |
| 103.132.156.0/22 | 1k | APNIC | TW | 9th Jan 2019 |
| 103.134.80.0/22 | 1k | APNIC | TW | 11th Feb 2019 |
| 103.135.16.0/22 | 1k | APNIC | TW | 20th Feb 2019 |
| 103.142.176.0/23 | 512 | APNIC | TW | 2nd Sept 2019 |
| 103.146.164.0/23 | 512 | APNIC | TW | 17th Dec 2019 |
| 103.148.146.0/23 | 512 | APNIC | TW | 15th Feb 2020 |
| 103.148.68.0/23 | 512 | APNIC | TW | 6th Feb 2020 |
| 103.149.110.0/23 | 512 | APNIC | TW | 12th Mar 2020 |
| 103.149.66.0/23 | 512 | APNIC | TW | 9th Mar 2020 |
| 103.153.200.0/23 | 512 | APNIC | TW | 27th Jul 2020 |
| 103.156.116.0/23 | 512 | APNIC | TW | 24th Sept 2020 |
| 103.157.86.0/23 | 512 | APNIC | TW | 15th Oct 2020 |
| 103.158.76.0/23 | 512 | APNIC | TW | 6th Nov 2020 |
| 103.158.78.0/23 | 512 | APNIC | TW | 6th Nov 2020 |
| 103.16.240.0/22 | 1k | APNIC | TW | 19th Feb 2013 |
| 103.16.244.0/22 | 1k | APNIC | TW | 19th Feb 2013 |
| 103.160.214.0/23 | 512 | APNIC | TW | 23rd Dec 2020 |
| 103.160.224.0/23 | 512 | APNIC | TW | 25th Dec 2020 |
| 103.169.106.0/23 | 512 | APNIC | TW | 2nd Jul 2021 |
| 103.183.154.0/23 | 512 | APNIC | TW | 11th Mar 2022 |
| 103.189.108.0/23 | 512 | APNIC | TW | 9th Jun 2022 |
| 103.190.168.0/23 | 512 | APNIC | TW | 6th Jul 2022 |
| 103.191.20.0/23 | 512 | APNIC | TW | 11th Jul 2022 |
| 103.196.172.0/23 | 512 | APNIC | TW | 25th Sept 2015 |
| 103.2.216.0/22 | 1k | APNIC | TW | 27th Apr 2011 |
| 103.20.176.0/22 | 1k | APNIC | TW | 19th Sept 2012 |
| 103.207.252.0/22 | 1k | APNIC | TW | 29th Jan 2016 |
| 103.22.212.0/22 | 1k | APNIC | TW | 11th Aug 2016 |