subnet.im

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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.

Unannounced blocks in Singapore

529 blocks match, ordered by prefix.

Allocated but unannounced blocks, 401 to 450 of 529
PrefixAddressesRegistryCountryAllocated
2401:f900::/324.3B × /64APNICSG19th Sept 2011
2401:f960::/324.3B × /64APNICSG25th Mar 2025
2401:faa0::/324.3B × /64APNICSG4th Apr 2025
2402:39a0::/324.3B × /64APNICSG19th Nov 2025
2402:4360::/324.3B × /64APNICSG29th Dec 2025
2402:44a0::/324.3B × /64APNICSG31st Dec 2025
2402:4a20::/324.3B × /64APNICSG22nd Jan 2026
2402:500::/324.3B × /64APNICSG20th Sept 2011
2402:5900::/324.3B × /64APNICSG24th Oct 2011
2402:60e0::/324.3B × /64APNICSG1st Jun 2026
2402:6e0::/324.3B × /64APNICSG2nd May 2025
2402:7880::/324.3B × /64APNICSG17th Jun 2015
2402:8f00::/324.3B × /64APNICSG17th Nov 2011
2402:980::/324.3B × /64APNICSG9th Feb 2015
2402:a900::/324.3B × /64APNICSG8th Dec 2011
2402:d80::/324.3B × /64APNICSG13th Feb 2015
2402:e600::/324.3B × /64APNICSG18th Jun 2010
2402:f0c0::/324.3B × /64APNICSG24th May 2018
2403:100::/324.3B × /64APNICSG31st Jan 2012
2403:19c0::/324.3B × /64APNICSG26th Jun 2018
2403:1a80::/324.3B × /64APNICSG20th Oct 2015
2403:2340::/324.3B × /64APNICSG4th Jul 2018
2403:3100::/324.3B × /64APNICSG28th Feb 2012
2403:6b00::/324.3B × /64APNICSG23rd Mar 2012
2403:740::/324.3B × /64APNICSG7th Jun 2018
2403:7c80::/324.3B × /64APNICSG12th Nov 2015
2403:940::/324.3B × /64APNICSG7th Jun 2018
2403:a900::/324.3B × /64APNICSG23rd Apr 2012
2403:b101::/324.3B × /64APNICSG31st Jan 2022
2403:c500::/324.3B × /64APNICSG4th May 2012
2403:cc00::/324.3B × /64APNICSG22nd Jan 2010
2403:dc40::/324.3B × /64APNICSG30th Oct 2018
2403:de40::/324.3B × /64APNICSG31st Oct 2018
2403:df00::/324.3B × /64APNICSG11th May 2012
2403:ec40::/324.3B × /64APNICSG12th Nov 2018
2404:39c0::/324.3B × /64APNICSG8th Jan 2019
2404:6340::/324.3B × /64APNICSG11th Feb 2019
2404:7540::/324.3B × /64APNICSG21st Feb 2019
2404:7780::/324.3B × /64APNICSG4th Mar 2016
2404:8540::/324.3B × /64APNICSG1st Mar 2019
2404:8ac0::/324.3B × /64APNICSG5th Mar 2019
2404:92c0::/324.3B × /64APNICSG7th Mar 2019
2404:940::/324.3B × /64APNICSG30th Nov 2018
2404:9440::/324.3B × /64APNICSG9th Mar 2019
2404:a580::/324.3B × /64APNICSG31st Mar 2016
2404:cc40::/324.3B × /64APNICSG22nd Apr 2019
2404:e600::/324.3B × /64APNICSG19th Oct 2010
2404:ea40::/324.3B × /64APNICSG30th May 2019
2404:fd80::/324.3B × /64APNICSG7th May 2016
2405:3100::/324.3B × /64APNICSG19th Sept 2012