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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,434 blocks match, ordered by prefix.

Allocated but unannounced blocks, 28101 to 28150 of 30434
PrefixAddressesRegistryCountryAllocated
2620:20:2000::/4865.5k × /64ARINUS24th May 2017
2620:20:4000::/4865.5k × /64ARINUS28th Mar 2013
2620:20:6000::/4865.5k × /64ARINUS24th May 2017
2620:20::/4865.5k × /64ARINUS3rd Feb 2010
2620:20:a000::/4865.5k × /64ARINUS30th May 2017
2620:20:c000::/4865.5k × /64ARINUS8th Apr 2013
2620:21:2000::/4865.5k × /64ARINUS31st May 2017
2620:21:4000::/4865.5k × /64ARINUS9th Apr 2013
2620:21:6000::/441M × /64ARINUS5th Jun 2017
2620:21:8000::/4865.5k × /64ARINUS21st Apr 2011
2620:21::/4865.5k × /64ARINUS15th May 2026
2620:21:a000::/4865.5k × /64ARINUS5th Jun 2017
2620:21:e000::/4865.5k × /64ARINUS29th May 2026
2620:22:2000::/4865.5k × /64ARINUS7th Jun 2017
2620:22:6000::/4865.5k × /64ARINUS7th Jun 2017
2620:22:a000::/4865.5k × /64ARINUS8th Jun 2017
2620:22:c000::/4865.5k × /64ARINUS12th Apr 2013
2620:23:4000::/4865.5k × /64ARINUS23rd Apr 2013
2620:23:6000::/4865.5k × /64ARINUS12th Jun 2017
2620:23:8000::/4865.5k × /64ARINUS26th Apr 2011
2620:23::/4865.5k × /64ARINUS28th Dec 2010
2620:23:a000::/4865.5k × /64ARINUS13th Jun 2017
2620:23:e000::/4865.5k × /64ARINUS15th Jun 2017
2620:24:40c0::/4865.5k × /64ARINUS15th Mar 2016
2620:24:8080::/4865.5k × /64ARINUS28th Jun 2012
2620:24::/432.1M × /64ARINUS19th Apr 2010
2620:25:2000::/4865.5k × /64ARINUS20th Jun 2017
2620:25:4000::/4865.5k × /64ARINUS2nd May 2013
2620:25:8000::/4865.5k × /64ARINUS27th Apr 2011
2620:25::/4865.5k × /64ARINUS28th Dec 2010
2620:25:c000::/441M × /64ARINUS3rd May 2013
2620:26:2000::/4865.5k × /64ARINUS22nd Jun 2017
2620:26:4000::/441M × /64ARINUS6th May 2013
2620:26::/4865.5k × /64ARINUS24th Jun 2010
2620:26:a000::/4865.5k × /64ARINUS28th Jun 2017
2620:27:40c0::/4865.5k × /64ARINCA16th Mar 2016
2620:27:8080::/4865.5k × /64ARINUS28th Jun 2012
2620:28:2000::/4865.5k × /64ARINUS28th Jun 2017
2620:28:4000::/441M × /64ARINUS8th May 2013
2620:28:8000::/4865.5k × /64ARINIT27th Apr 2011
2620:28::/4865.5k × /64ARINUS10th Mar 2010
2620:28:a000::/4865.5k × /64ARINUS10th Jul 2017
2620:28:e000::/4865.5k × /64ARINUS10th Jul 2017
2620:29:2000::/4865.5k × /64ARINUS12th Jul 2017
2620:29:4000::/4865.5k × /64ARINUS10th May 2013
2620:29:6000::/4865.5k × /64ARINUS1st Jun 2026
2620:29::/4865.5k × /64ARINUS29th Dec 2010
2620:29:a000::/4865.5k × /64ARINUS13th Jul 2017
2620:29:c000::/441M × /64ARINUS14th May 2013
2620:2:4000::/4865.5k × /64ARINCA7th Aug 2012