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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 351 to 400 of 529
PrefixAddressesRegistryCountryAllocated
203.81.32.0/23512APNICSG1st Feb 2001
203.81.35.0/24256APNICSG1st Feb 2001
203.81.38.0/23512APNICSG1st Feb 2001
203.83.250.0/24256APNICSG30th Jan 2007
203.84.130.0/23512APNICSG28th Oct 2005
209.103.160.0/198.2kAPNICSG23rd Feb 2000
210.247.128.0/1816.4kAPNICSG15th Nov 2005
213.177.170.0/24256RIPE NCCSG15th Oct 2025
220.232.0.0/198.2kAPNICSG19th Jan 2004
223.130.0.0/221kAPNICSG8th Dec 2010
23.156.44.0/24256ARINSG9th Apr 2026
23.158.132.0/24256ARINSG18th May 2026
2400:1100::/324.3B × /64APNICSG31st Mar 2011
2400:1d00::/324.3B × /64APNICSG4th Apr 2011
2400:38a0::/324.3B × /64APNICSG29th Nov 2021
2400:3b20::/324.3B × /64APNICSG6th Dec 2021
2400:4680::/324.3B × /64APNICSG30th Oct 2013
2400:6780::/324.3B × /64APNICSG28th Nov 2013
2400:7980::/324.3B × /64APNICSG16th Dec 2013
2400:7e80::/324.3B × /64APNICSG19th Dec 2013
2400:8900::/324.3B × /64APNICSG28th Apr 2011
2400:aa20::/324.3B × /64APNICSG13th Sept 2022
2400:da80::/324.3B × /64APNICSG7th Apr 2014
2400:dea0::/324.3B × /64APNICSG13th Feb 2023
2400:ec80::/324.3B × /64APNICSG28th Apr 2014
2400:f040::/324.3B × /64APNICSG31st Mar 2017
2400:fb80::/324.3B × /64APNICSG12th May 2014
2401:1120::/324.3B × /64APNICSG29th Jun 2023
2401:17e0::/324.3B × /64APNICSG13th Jul 2023
2401:2020::/324.3B × /64APNICSG3rd Aug 2023
2401:22c0::/324.3B × /64APNICSG12th May 2017
2401:26e0::/324.3B × /64APNICSG15th Aug 2023
2401:3460::/324.3B × /64APNICSG7th Sept 2023
2401:3740::/324.3B × /64APNICSG5th Jun 2017
2401:3ec0::/324.3B × /64APNICSG6th Jun 2017
2401:5720::/324.3B × /64APNICSG5th Dec 2023
2401:5a20::/324.3B × /64APNICSG12th Dec 2023
2401:7401::/324.3B × /64APNICSG7th Jun 2012
2401:7de0::/324.3B × /64APNICSG7th Feb 2024
2401:ac40::/324.3B × /64APNICSG23rd Aug 2017
2401:af40::/324.3B × /64APNICSG24th Aug 2017
2401:b3c0::/324.3B × /64APNICSG30th Aug 2017
2401:bae0::/324.3B × /64APNICSG14th Aug 2024
2401:c901::/324.3B × /64APNICSG20th Nov 2013
2401:d5c0::/324.3B × /64APNICSG30th Sept 2017
2401:db00::/324.3B × /64APNICSG31st Aug 2011
2401:db80::/324.3B × /64APNICSG16th Dec 2014
2401:eb60::/324.3B × /64APNICSG29th Jan 2025
2401:ed60::/324.3B × /64APNICSG10th Feb 2025
2401:ef00::/324.3B × /64APNICSG8th Sept 2011