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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,277 blocks match, ordered by prefix.

Allocated but unannounced blocks, 24951 to 25000 of 26277
PrefixAddressesRegistryCountryAllocated
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: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::/4865.5k × /64ARINUS15th Jun 2010
2620:dc:a000::/4865.5k × /64ARINUS29th Aug 2025
2620:dc:c000::/4865.5k × /64ARINUS1st Oct 2015
2620:dd:4000::/4865.5k × /64ARINUS1st Oct 2015
2620:dd:6000::/4865.5k × /64ARINUS18th Sept 2025
2620:dd:8000::/4865.5k × /64ARINUS28th Mar 2012
2620:dd:a000::/4865.5k × /64ARINUS25th Sept 2025
2620:dd:c000::/4865.5k × /64ARINUS2nd Oct 2015
2620:dd:e000::/4865.5k × /64ARINUS3rd Oct 2025
2620:de:4000::/4865.5k × /64ARINUS8th Oct 2015
2620:de:6000::/4865.5k × /64ARINUS15th Oct 2025
2620:de:8000::/4865.5k × /64ARINUS3rd Apr 2012
2620:de::/4865.5k × /64ARINUS27th Oct 2010
2620:de:e000::/4865.5k × /64ARINUS4th Nov 2025
2620:df:2000::/4865.5k × /64ARINUS7th Nov 2025
2620:df::/4865.5k × /64ARINUS18th Mar 2011
2620:df:a000::/4865.5k × /64ARINUS10th Nov 2025
2620:df:c000::/4865.5k × /64ARINUS16th Oct 2015
2620:e0:4000::/4865.5k × /64ARINUS16th Oct 2015
2620:e0:8000::/4865.5k × /64ARINUS9th Apr 2012
2620:e0::/4865.5k × /64ARINUS23rd Feb 2010
2620:e0:a000::/4865.5k × /64ARINUS4th Dec 2025
2620:e0:e000::/4865.5k × /64ARINUS12th Dec 2025
2620:e1:4000::/4865.5k × /64ARINUS20th Oct 2015
2620:e1::/4865.5k × /64ARINUS3rd Nov 2011
2620:e2:8000::/4865.5k × /64ARINUS17th Apr 2012
2620:e2::/4865.5k × /64ARINUS3rd Nov 2010
2620:e2:c000::/4865.5k × /64ARINUS29th Oct 2015
2620:e3:4000::/4865.5k × /64ARINUS29th Oct 2015
2620:e3:8000::/4865.5k × /64ARINUS17th Apr 2012
2620:e3::/4865.5k × /64ARINUS5th Aug 2026
2620:e3:c000::/4865.5k × /64ARINUS3rd Nov 2015
2620:e4:4000::/4865.5k × /64ARINUS6th Nov 2015
2620:e4:8000::/4865.5k × /64ARINUS5th Aug 2026
2620:e4::/4865.5k × /64ARINUS3rd Jun 2010
2620:e4:c000::/4865.5k × /64ARINUS10th Nov 2015
2620:e5:8000::/4865.5k × /64ARINUS19th Apr 2012
2620:e5::/4865.5k × /64ARINUS23rd Mar 2011
2620:e5:c000::/4865.5k × /64ARINUS17th Nov 2015
2620:e6:4000::/4865.5k × /64ARINUS17th Nov 2015