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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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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, 24701 to 24750 of 26277
PrefixAddressesRegistryCountryAllocated
2620:a4:b040::/4865.5k × /64ARINUS18th Dec 2025
2620:a4:d820::/4865.5k × /64ARINUS9th Mar 2026
2620:a5:4000::/4865.5k × /64ARINUS6th Jan 2015
2620:a5::/4865.5k × /64ARINUS28th Feb 2011
2620:a5:e000::/4865.5k × /64ARINUS18th Jan 2022
2620:a6:6000::/4865.5k × /64ARINUS24th Jan 2022
2620:a6::/4865.5k × /64ARINUS4th Oct 2010
2620:a6:a000::/4865.5k × /64ARINUS1st Feb 2022
2620:a6:c000::/4865.5k × /64ARINUS15th Jan 2015
2620:a6:e000::/4865.5k × /64ARINUS14th Feb 2022
2620:a7:2000::/4865.5k × /64ARINUS16th Feb 2022
2620:a7:8000::/4865.5k × /64ARINUS4th Oct 2011
2620:a7:a000::/4865.5k × /64ARINUS4th Mar 2022
2620:a7:e000::/4865.5k × /64ARINUS7th Mar 2022
2620:a8:4000::/4865.5k × /64ARINUS27th Jan 2015
2620:a8:8000::/4865.5k × /64ARINUS10th Oct 2011
2620:a8:a000::/4865.5k × /64ARINUS4th Apr 2022
2620:a8:e000::/4865.5k × /64ARINUS7th Apr 2022
2620:a9:2000::/4865.5k × /64ARINUS7th Apr 2022
2620:a9:8000::/441M × /64ARINUS9th Dec 2013
2620:a9::/4865.5k × /64ARINUS1st Mar 2011
2620:a9:c080::/4865.5k × /64ARINUS11th May 2016
2620:a:4000::/4865.5k × /64ARINUS17th Sept 2012
2620:a:6000::/4865.5k × /64ARINUS30th Sept 2016
2620:a:8000::/4865.5k × /64ARINUS6th Apr 2011
2620:a:a000::/4865.5k × /64ARINUS7th Oct 2016
2620:a:c000::/4865.5k × /64ARINUS17th Sept 2012
2620:a:e000::/4865.5k × /64ARINUS7th Oct 2016
2620:aa::/4865.5k × /64ARINUS6th Oct 2010
2620:aa:c000::/4865.5k × /64ARINUS3rd Feb 2015
2620:aa:e000::/4865.5k × /64ARINUS29th Apr 2022
2620:ab:2000::/4865.5k × /64ARINUS6th May 2022
2620:ab:6000::/441M × /64ARINUS11th May 2022
2620:ab:8000::/4865.5k × /64ARINUS17th Oct 2011
2620:ab::/4865.5k × /64ARINUS1st Mar 2011
2620:ab:e000::/4865.5k × /64ARINUS24th May 2022
2620:ac:2000::/441M × /64ARINUS25th May 2022
2620:ac:8000::/4865.5k × /64ARINUS19th Oct 2011
2620:ac::/4865.5k × /64ARINUS18th May 2010
2620:ac:a000::/4865.5k × /64ARINUS9th Jun 2022
2620:ac:e000::/4865.5k × /64ARINUS13th Jun 2022
2620:ad:4000::/4865.5k × /64ARINUS19th Feb 2015
2620:ad::/4865.5k × /64ARINUS1st Mar 2011
2620:ad:e000::/4865.5k × /64ARINUS2nd Aug 2022
2620:ae:4000::/4865.5k × /64ARINUS24th Feb 2015
2620:ae:6000::/4865.5k × /64ARINUS5th Aug 2022
2620:ae:8000::/4865.5k × /64ARINUS21st Oct 2011
2620:af:2000::/4865.5k × /64ARINUS18th Aug 2022
2620:af:4000::/4865.5k × /64ARINUS2nd Mar 2015
2620:af:8000::/4865.5k × /64ARINUS25th Oct 2011