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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 451 to 500 of 529
PrefixAddressesRegistryCountryAllocated
2405:4900::/324.3B × /64APNICSG24th Sept 2012
2405:7ac0::/324.3B × /64APNICSG13th Nov 2019
2405:eb80::/324.3B × /64APNICSG15th Jul 2016
2405:ff40::/324.3B × /64APNICSG15th Apr 2020
2406:4800::/324.3B × /64APNICSG30th Mar 2009
2406:5e40::/324.3B × /64APNICSG18th Aug 2020
2406:740::/324.3B × /64APNICSG21st Apr 2020
2406:7e40::/324.3B × /64APNICSG21st Sept 2020
2406:91c0::/324.3B × /64APNICSG6th Oct 2020
2406:9ec0::/324.3B × /64APNICSG19th Oct 2020
2406:c300::/324.3B × /64APNICSG17th Apr 2013
2406:cc00::/324.3B × /64APNICSG23rd Feb 2010
2406:f000::/324.3B × /64APNICSG21st Apr 2008
2407:1a80::/324.3B × /64APNICSG2nd Sept 2016
2407:5340::/324.3B × /64APNICSG19th Apr 2021
2407:5fc0::/324.3B × /64APNICSG11th May 2021
2407:6300::/324.3B × /64APNICSG2nd Jul 2013
2407:7c00::/324.3B × /64APNICSG2nd Mar 2010
2407:80::/324.3B × /64APNICSG1st Sept 2016
2407:8500::/324.3B × /64APNICSG16th Jul 2013
2407:8ec0::/324.3B × /64APNICSG16th Jun 2021
2407:9380::/324.3B × /64APNICSG19th Oct 2016
2407:9a80::/324.3B × /64APNICSG21st Oct 2016
2407:9c40::/324.3B × /64APNICSG29th Jun 2021
2407:a380::/324.3B × /64APNICSG28th Oct 2016
2407:c5c0::/2934.4B × /64APNICSG13th Aug 2021
2407:d040::/324.3B × /64APNICSG26th Aug 2021
2407:e000::/324.3B × /64APNICSG2nd Nov 2007
2407:eb00::/324.3B × /64APNICSG12th Sept 2013
2410::/17141T × /64APNICSG8th Nov 2024
2602:f3bc::/4016.8M × /64ARINSG15th May 2026
2602:f402::/4016.8M × /64ARINSG7th Apr 2026
2602:f548::/4016.8M × /64ARINSG26th Sept 2025
2602:f741::/36268M × /64ARINSG9th Jan 2025
2602:f74f::/36268M × /64ARINSG30th Dec 2024
2602:f832::/4016.8M × /64ARINSG21st Aug 2024
2602:f834::/4016.8M × /64ARINSG21st Aug 2024
2602:f8fe::/4016.8M × /64ARINSG3rd May 2024
2602:f902::/4016.8M × /64ARINSG2nd May 2024
2602:fbfc::/36268M × /64ARINSG6th Dec 2021
2602:fc51::/36268M × /64ARINSG26th Jul 2021
27.0.96.0/198.2kAPNICSG2nd Mar 2011
27.109.104.0/221kAPNICSG18th Jun 2010
27.114.192.0/1816.4kAPNICSG12th Jul 2010
27.116.32.0/221kAPNICSG16th Jul 2010
2a01:900::/2934.4B × /64RIPE NCCSG28th May 2026
2a02:f440::/2934.4B × /64RIPE NCCSG14th Jan 2026
2a0b:da40::/2934.4B × /64RIPE NCCSG24th Aug 2017
2a0b:f500::/2934.4B × /64RIPE NCCSG3rd Aug 2026
2a0d:36c0::/2934.4B × /64RIPE NCCSG1st May 2026