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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks in Singapore
528 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.248.98.0/24 | 256 | APNIC |  SG | 17th May 2013 |
| 103.255.32.0/22 | 1k | APNIC | SG | 19th Dec 2013 |
| 103.27.228.0/22 | 1k | APNIC | SG | 9th Jul 2013 |
| 103.29.108.0/22 | 1k | APNIC | SG | 24th Jun 2011 |
| 103.30.121.0/24 | 256 | APNIC | SG | 7th Nov 2012 |
| 103.31.172.0/22 | 1k | APNIC | SG | 28th Nov 2012 |
| 103.31.24.0/23 | 512 | APNIC | SG | 20th Nov 2012 |
| 103.35.91.0/24 | 256 | APNIC | SG | 17th Aug 2015 |
| 103.39.7.0/24 | 256 | APNIC | SG | 17th Sept 2014 |
| 103.41.12.0/22 | 1k | APNIC | SG | 13th Oct 2014 |
| 103.44.112.0/22 | 1k | APNIC | SG | 5th Dec 2014 |
| 103.44.4.0/22 | 1k | APNIC | SG | 29th Nov 2014 |
| 103.47.232.0/24 | 256 | APNIC | SG | 9th Jan 2015 |
| 103.5.151.0/24 | 256 | APNIC | SG | 28th Sept 2011 |
| 103.5.199.0/24 | 256 | APNIC | SG | 29th Sept 2011 |
| 103.58.112.0/24 | 256 | APNIC | SG | 26th May 2015 |
| 103.69.140.0/22 | 1k | APNIC | SG | 18th Jul 2016 |
| 103.69.64.0/22 | 1k | APNIC | SG | 15th Jul 2016 |
| 103.7.156.0/22 | 1k | APNIC | SG | 27th Mar 2012 |
| 103.75.175.0/24 | 256 | APNIC | SG | 22nd Sept 2016 |
| 103.76.36.0/22 | 1k | APNIC | SG | 27th Sept 2016 |
| 103.77.200.0/24 | 256 | APNIC | SG | 20th Oct 2022 |
| 103.79.148.0/22 | 1k | APNIC | SG | 18th Nov 2016 |
| 103.8.152.0/22 | 1k | APNIC | SG | 23rd Apr 2012 |
| 103.83.160.0/24 | 256 | APNIC | SG | 18th Jan 2017 |
| 103.89.140.0/22 | 1k | APNIC | SG | 31st Mar 2017 |
| 103.98.55.0/24 | 256 | APNIC | SG | 1st Aug 2017 |
| 109.120.143.0/24 | 256 | RIPE NCC | SG | 27th Aug 2009 |
| 111.91.192.0/19 | 8.2k | APNIC | SG | 23rd Jun 2009 |
| 111.92.192.0/19 | 8.2k | APNIC | SG | 25th Jun 2009 |
| 112.78.224.0/19 | 8.2k | APNIC | SG | 13th Jan 2009 |
| 113.197.104.0/22 | 1k | APNIC | SG | 5th Dec 2008 |
| 114.129.45.0/24 | 256 | APNIC | SG | 5th Jun 2008 |
| 115.167.80.0/20 | 4.1k | APNIC | SG | 2nd Sept 2008 |
| 115.31.224.0/19 | 8.2k | APNIC | SG | 11th Jul 2008 |
| 116.193.0.0/21 | 2k | APNIC | SG | 5th Apr 2007 |
| 116.206.76.0/22 | 1k | APNIC | SG | 7th Feb 2017 |
| 116.214.123.0/24 | 256 | APNIC | SG | 1st May 2007 |
| 116.214.125.0/24 | 256 | APNIC | SG | 1st May 2007 |
| 116.214.126.0/23 | 512 | APNIC | SG | 1st May 2007 |
| 116.66.184.0/22 | 1k | APNIC | SG | 18th Jul 2016 |
| 117.105.0.0/16 | 65.5k | APNIC | SG | 30th Jul 2007 |
| 119.13.248.0/21 | 2k | APNIC | SG | 18th May 2009 |
| 119.42.192.0/19 | 8.2k | APNIC | SG | 8th Jan 2008 |
| 120.51.96.0/19 | 8.2k | APNIC | SG | 20th Mar 2008 |
| 123.100.235.0/24 | 256 | APNIC | SG | 10th Nov 2006 |
| 123.253.80.0/22 | 1k | APNIC | SG | 13th May 2019 |
| 123.49.64.0/19 | 8.2k | APNIC | SG | 8th Jun 2006 |
| 123.49.96.0/19 | 8.2k | APNIC | SG | 14th Feb 2007 |
| 124.108.112.0/20 | 4.1k | APNIC | SG | 20th Jun 2007 |