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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 24351 to 24400 of 26277
PrefixAddressesRegistryCountryAllocated
2620:53::/4865.5k × /64ARINUS31st Jan 2011
2620:53:c000::/4865.5k × /64ARINUS23rd Oct 2013
2620:54:4000::/4865.5k × /64ARINUS23rd Oct 2013
2620:54:6000::/4865.5k × /64ARINUS7th Jul 2026
2620:54::/4865.5k × /64ARINUS29th Apr 2010
2620:55:4000::/441M × /64ARINUS25th Oct 2013
2620:55:8000::/4865.5k × /64ARINUS14th Jun 2011
2620:55::/4865.5k × /64ARINUS31st Jan 2011
2620:55:a000::/4865.5k × /64ARINUS30th Aug 2018
2620:55:c000::/4865.5k × /64ARINUS28th Oct 2013
2620:55:e000::/4865.5k × /64ARINUS4th Sept 2018
2620:56:8000::/4865.5k × /64ARINUS14th Jun 2011
2620:56::/4865.5k × /64ARINUS27th Sept 2011
2620:56:c000::/441M × /64ARINUS28th Oct 2013
2620:57:8000::/4865.5k × /64ARINUS16th Jun 2011
2620:57:a000::/4865.5k × /64ARINUS18th Sept 2018
2620:58:8800::/4865.5k × /64ARINUS30th Nov 2012
2620:58::/4016.8M × /64ARINUS17th Mar 2010
2620:59:2000::/4865.5k × /64ARINUS14th Jul 2026
2620:59:4000::/4865.5k × /64ARINUS6th Nov 2013
2620:59:8000::/4865.5k × /64ARINUS17th Jun 2011
2620:59::/4865.5k × /64ARINUS4th Feb 2011
2620:59:e000::/4865.5k × /64ARINUS2nd Oct 2018
2620:5:4000::/441M × /64ARINUS20th May 2013
2620:5:8000::/4865.5k × /64ARINUS4th Apr 2011
2620:5::/4865.5k × /64ARINUS29th Nov 2010
2620:5:c000::/4865.5k × /64ARINUS15th Aug 2012
2620:5:e000::/4865.5k × /64ARINUS15th Aug 2016
2620:5a:2000::/4865.5k × /64ARINUS4th Oct 2018
2620:5a:8000::/4865.5k × /64ARINUS20th Jun 2011
2620:5a::/4865.5k × /64ARINUS30th Jan 2014
2620:5b:2000::/4865.5k × /64ARINUS17th Oct 2018
2620:5b:4000::/4865.5k × /64ARINUS13th Nov 2013
2620:5b::/4865.5k × /64ARINUS4th Feb 2011
2620:5b:a000::/4865.5k × /64ARINUS29th Oct 2018
2620:5c:2000::/4865.5k × /64ARINUS29th Oct 2018
2620:5c:8000::/4865.5k × /64ARINUS20th Jun 2011
2620:5c::/4865.5k × /64ARINUS3rd May 2010
2620:5d:2000::/4865.5k × /64ARINUS31st Oct 2018
2620:5d:4000::/4865.5k × /64ARINUS21st Nov 2013
2620:5d:8000::/4865.5k × /64ARINUS20th Jun 2011
2620:5d::/4865.5k × /64ARINUS7th Feb 2011
2620:5d:c000::/4865.5k × /64ARINUS21st Nov 2013
2620:5d:e000::/4865.5k × /64ARINUS6th Nov 2018
2620:5e:2000::/4016.8M × /64ARINUS6th Nov 2018
2620:5e:8000::/4865.5k × /64ARINUS22nd Jun 2011
2620:5e::/4865.5k × /64ARINUS9th Aug 2010
2620:5f:2000::/4865.5k × /64ARINUS12th Nov 2018
2620:5f:6000::/4865.5k × /64ARINUS14th Nov 2018
2620:5f::/4865.5k × /64ARINUS7th Feb 2011