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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

85,346 blocks match, ordered by prefix.

Allocated but unannounced blocks, 35401 to 35450 of 85346
PrefixAddressesRegistryCountryAllocated
2001:505:154::/4865.5k × /64ARINUS28th Jul 2026
2001:506:1000::/36268M × /64ARINUS8th May 2009
2001:506:100::/4865.5k × /64ARINUS1st Dec 2010
2001:506:1::/4865.5k × /64ARINUS22nd Apr 2009
2001:506:2000::/36268M × /64ARINUS1st Jun 2009
2001:506:200::/4016.8M × /64ARINUS27th Dec 2017
2001:506:21::/4865.5k × /64ARINUS16th Jul 2020
2001:506:28::/4865.5k × /64ARINUS23rd Feb 2011
2001:506:2::/4865.5k × /64ARINUS1st Jul 2022
2001:506:300::/4016.8M × /64ARINUS4th Nov 2019
2001:506:30::/4865.5k × /64ARINUS30th Oct 2018
2001:506:38::/4865.5k × /64ARINUS13th Apr 2020
2001:506:3a::/4865.5k × /64ARINUS24th Dec 2025
2001:506:4000::/35537M × /64ARINUS11th May 2012
2001:506:6000::/35537M × /64ARINUS22nd May 2013
2001:506:8::/4865.5k × /64ARINUS7th May 2008
2001:506:9::/4865.5k × /64ARINUS14th Oct 2020
2001:506::/4865.5k × /64ARINUS17th Jan 2007
2001:530::/324.3B × /64ARINUS31st Oct 2002
2001:570::/324.3B × /64ARINUS5th Feb 2003
2001:5d0::/324.3B × /64ARINUS26th Mar 2003
2001:5d8::/324.3B × /64ARINUS4th Apr 2003
2001:5f0::/324.3B × /64ARINUS28th Apr 2003
2001:678:1008::/4865.5k × /64RIPE NCCPL24th Jan 2025
2001:678:1018::/4865.5k × /64RIPE NCCGB31st Jul 2026
2001:678:1028::/4865.5k × /64RIPE NCCGB5th Feb 2025
2001:678:1044::/4865.5k × /64RIPE NCCPL26th Feb 2025
2001:678:1048::/4865.5k × /64RIPE NCCDE28th Feb 2025
2001:678:104::/4865.5k × /64RIPE NCCCZ22nd Mar 2016
2001:678:104c::/4865.5k × /64RIPE NCCIE28th Feb 2025
2001:678:1054::/4865.5k × /64RIPE NCCGB5th Mar 2025
2001:678:1058::/4865.5k × /64RIPE NCCRU5th Mar 2025
2001:678:105c::/4865.5k × /64RIPE NCCSE24th Aug 2026
2001:678:1060::/4865.5k × /64RIPE NCCNO1st Apr 2025
2001:678:106c::/4865.5k × /64RIPE NCCUS10th Apr 2025
2001:678:1078::/4865.5k × /64RIPE NCCNL21st May 2025
2001:678:107c::/4865.5k × /64RIPE NCCGB30th Jun 2026
2001:678:108::/4865.5k × /64RIPE NCCSK23rd Mar 2016
2001:678:108c::/4865.5k × /64RIPE NCCDE28th May 2025
2001:678:1094::/4865.5k × /64RIPE NCCPT30th May 2025
2001:678:1098::/4865.5k × /64RIPE NCCES4th Jun 2025
2001:678:109c::/4865.5k × /64RIPE NCCSK5th Jun 2025
2001:678:10a0::/4865.5k × /64RIPE NCCHR6th Jun 2025
2001:678:10a4::/4865.5k × /64RIPE NCCPL6th Jun 2025
2001:678:10a8::/4865.5k × /64RIPE NCCDE10th Jun 2025
2001:678:10bc::/4865.5k × /64RIPE NCCDE23rd Jun 2025
2001:678:10c0::/4865.5k × /64RIPE NCCNL4th Jul 2025
2001:678:10cc::/4865.5k × /64RIPE NCCDK11th Jul 2025
2001:678:10f0::/4865.5k × /64RIPE NCCDE25th Aug 2025
2001:678:10f4::/4865.5k × /64RIPE NCCDE26th Aug 2025