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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 24801 to 24850 of 26277
PrefixAddressesRegistryCountryAllocated
2620:b9:c000::/4865.5k × /64ARINUS5th May 2015
2620:b:4000::/4865.5k × /64ARINUS18th Sept 2012
2620:b:6000::/4865.5k × /64ARINUS6th Apr 2026
2620:b:8000::/4865.5k × /64ARINUS6th Apr 2011
2620:b::/4865.5k × /64ARINUS2nd Dec 2010
2620:b:a000::/4865.5k × /64ARINUS13th Apr 2026
2620:b:c000::/4865.5k × /64ARINUS20th Sept 2012
2620:ba:4000::/4865.5k × /64ARINUS8th May 2015
2620:ba::/4016.8M × /64ARINUS15th Oct 2010
2620:ba:a000::/4865.5k × /64ARINUS6th Jul 2023
2620:ba:c000::/4865.5k × /64ARINUS14th May 2015
2620:ba:e000::/4865.5k × /64ARINUS13th Jul 2023
2620:bb:2000::/4865.5k × /64ARINUS14th Jul 2023
2620:bb::/4865.5k × /64ARINUS2nd Mar 2011
2620:bc:6000::/4865.5k × /64ARINUS26th Jul 2023
2620:bc:8000::/4865.5k × /64ARINUS19th Dec 2011
2620:bc:a000::/441M × /64ARINUS28th Jul 2023
2620:bc:c000::/4865.5k × /64ARINUS19th May 2015
2620:bd:8000::/4865.5k × /64ARINUS19th Dec 2011
2620:bd:e000::/4865.5k × /64ARINUS9th Aug 2023
2620:be:4000::/4865.5k × /64ARINUS3rd Jun 2015
2620:be:6000::/4865.5k × /64ARINUS29th Aug 2023
2620:be:8000::/4865.5k × /64ARINUS22nd Dec 2011
2620:be:c000::/4865.5k × /64ARINUS5th Jun 2015
2620:be:e000::/4865.5k × /64ARINUS31st Aug 2023
2620:bf:4000::/4865.5k × /64ARINUS18th Jun 2015
2620:bf:6000::/4865.5k × /64ARINUS11th Sept 2023
2620:bf:8000::/4865.5k × /64ARINUS27th Dec 2011
2620:bf::/4865.5k × /64ARINUS3rd Mar 2011
2620:bf:a000::/4865.5k × /64ARINUS29th Sept 2023
2620:bf:c000::/4865.5k × /64ARINUS27th Feb 2025
2620:bf:e000::/4865.5k × /64ARINUS3rd Oct 2023
2620:c0:4000::/441M × /64ARINUS19th Jun 2015
2620:c0:8000::/4865.5k × /64ARINUS10th Jan 2012
2620:c1:2000::/4865.5k × /64ARINUS17th Nov 2023
2620:c1::/4865.5k × /64ARINUS7th Mar 2011
2620:c1:a000::/4865.5k × /64ARINUS4th Dec 2023
2620:c2:4000::/4865.5k × /64ARINUS26th Jun 2015
2620:c2:6000::/4865.5k × /64ARINUS11th Dec 2023
2620:c2::/4865.5k × /64ARINUS19th Oct 2010
2620:c2:a000::/4865.5k × /64ARINUS11th Dec 2023
2620:c2:e000::/4865.5k × /64ARINUS27th Dec 2023
2620:c3:2000::/4865.5k × /64ARINUS4th Jan 2024
2620:c3:4000::/4865.5k × /64ARINUS1st Jul 2015
2620:c3:8000::/4865.5k × /64ARINUS26th Jan 2012
2620:c4:2000::/4865.5k × /64ARINUS31st Jan 2024
2620:c4:4000::/4865.5k × /64ARINUS7th Jul 2015
2620:c4:6000::/4865.5k × /64ARINUS2nd Feb 2024
2620:c5:4000::/4865.5k × /64ARINUS8th Jul 2015
2620:c5:6000::/4865.5k × /64ARINUS23rd Feb 2024