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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.

Unannounced blocks registered through ARIN

30,434 blocks match, ordered by prefix.

Allocated but unannounced blocks, 28951 to 29000 of 30434
PrefixAddressesRegistryCountryAllocated
2620:d3:e000::/4865.5k × /64ARINUS21st Feb 2025
2620:d4:4000::/4865.5k × /64ARINUS31st Aug 2015
2620:d4:6000::/4865.5k × /64ARINUS28th Feb 2025
2620:d4:e000::/4865.5k × /64ARINUS17th Mar 2025
2620:d5:4000::/4865.5k × /64ARINUS2nd Sept 2015
2620:d5:8000::/4865.5k × /64ARINUS19th Mar 2012
2620:d5::/4865.5k × /64ARINUS17th Mar 2011
2620:d5:a000::/4865.5k × /64ARINUS3rd Apr 2025
2620:d5:c000::/4865.5k × /64ARINUS10th Sept 2015
2620:d5:e000::/4865.5k × /64ARINUS11th Apr 2025
2620:d6:2000::/4865.5k × /64ARINUS16th Apr 2025
2620:d6:4000::/4865.5k × /64ARINUS15th Sept 2015
2620:d6:6000::/4865.5k × /64ARINUS25th Apr 2025
2620:d6::/4865.5k × /64ARINUS25th Oct 2010
2620:d6:a000::/4865.5k × /64ARINUS7th May 2025
2620:d6:c000::/4865.5k × /64ARINUS15th Sept 2015
2620:d6:e000::/4865.5k × /64ARINUS8th May 2025
2620:d7:2000::/4865.5k × /64ARINUS12th May 2025
2620:d7:4000::/4865.5k × /64ARINCA17th Sept 2015
2620:d7:8000::/4865.5k × /64ARINUS15th Oct 2012
2620:d7::/4865.5k × /64ARINUS17th Mar 2011
2620:d7:c000::/4865.5k × /64ARINUS18th Sept 2015
2620:d8:2000::/4865.5k × /64ARINUS22nd May 2025
2620:d8:4000::/4865.5k × /64ARINUS21st Sept 2015
2620:d8:6000::/4865.5k × /64ARINUS2nd Jun 2025
2620:d8::/4865.5k × /64ARINUS2nd Apr 2010
2620:d8:a000::/4865.5k × /64ARINUS3rd Jun 2025
2620:d8:e000::/441M × /64ARINUS5th Jun 2025
2620:d9:4000::/4865.5k × /64ARINUS24th Sept 2015
2620:d9:8000::/4865.5k × /64ARINUS27th Nov 2012
2620:d9::/4865.5k × /64ARINUS17th Mar 2011
2620:d9:e000::/4865.5k × /64ARINUS14th Jul 2025
2620:d:2000::/4865.5k × /64ARINUS2nd Nov 2016
2620:d:4000::/4865.5k × /64ARINUS29th Oct 2012
2620:d:6000::/4865.5k × /64ARINUS8th Nov 2016
2620:d::/4865.5k × /64ARINUS3rd Oct 2012
2620:d:a000::/4865.5k × /64ARINUS8th Nov 2016
2620:d:c000::/4865.5k × /64ARINUS5th Nov 2012
2620:da::/4865.5k × /64ARINUS26th Oct 2010
2620:da:a000::/4865.5k × /64ARINUS6th Aug 2025
2620:da:e000::/4865.5k × /64ARINUS6th Aug 2025
2620:db:2000::/4865.5k × /64ARINUS7th Aug 2025
2620:db:4000::/4865.5k × /64ARINCA28th Sept 2015
2620:db:8000::/4865.5k × /64ARINUS27th Mar 2012
2620:db:e000::/4865.5k × /64ARINUS21st Aug 2025
2620:dc:2000::/4865.5k × /64ARINUS26th Aug 2025
2620:dc:4000::/4016.8M × /64ARINUS30th Sept 2015
2620:dc:8000::/4865.5k × /64ARINCA28th Mar 2012
2620:dc::/4865.5k × /64ARINUS15th Jun 2010
2620:dc:a000::/4865.5k × /64ARINUS29th Aug 2025