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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 24051 to 24100 of 26277
PrefixAddressesRegistryCountryAllocated
2620:18:4000::/4865.5k × /64ARINUS11th Feb 2013
2620:18:8000::/4865.5k × /64ARINUS15th Apr 2011
2620:18:e000::/4865.5k × /64ARINUS27th Mar 2017
2620:18a::/36268M × /64ARINUS23rd May 2017
2620:18b::/324.3B × /64ARINUS29th Jun 2017
2620:18e::/36268M × /64ARINUS31st Jul 2017
2620:191::/36268M × /64ARINUS6th Oct 2017
2620:193::/36268M × /64ARINUS4th May 2018
2620:194::/36268M × /64ARINUS25th May 2018
2620:195::/36268M × /64ARINUS25th Jun 2018
2620:198::/36268M × /64ARINUS29th Oct 2018
2620:199::/36268M × /64ARINUS26th Nov 2018
2620:19:6000::/4865.5k × /64ARINUS28th Mar 2017
2620:19::/4865.5k × /64ARINUS21st Dec 2010
2620:19:a000::/4865.5k × /64ARINUS5th Apr 2017
2620:19a::/36268M × /64ARINUS3rd Dec 2018
2620:19c::/36268M × /64ARINUS20th Feb 2019
2620:19d::/324.3B × /64ARINUS22nd Feb 2019
2620:19e::/36268M × /64ARINUS22nd Mar 2019
2620:1:4000::/4865.5k × /64ARINUS3rd Aug 2012
2620:1:8000::/4865.5k × /64ARINUS11th May 2022
2620:1::/4865.5k × /64ARINUS12th Nov 2010
2620:1:c000::/4865.5k × /64ARINUS6th Aug 2012
2620:1a0::/324.3B × /64ARINUS1st Aug 2011
2620:1a:2000::/441M × /64ARINUS6th Apr 2017
2620:1a:8000::/4865.5k × /64ARINUS15th Apr 2011
2620:1a::/4865.5k × /64ARINUS14th Jun 2010
2620:1a:a000::/4865.5k × /64ARINUS11th Apr 2017
2620:1a:c000::/4865.5k × /64ARINUS25th Feb 2013
2620:1b0::/324.3B × /64ARINUS3rd Oct 2011
2620:1b1::/36268M × /64ARINUS30th Sept 2019
2620:1b3::/36268M × /64ARINUS21st Jan 2020
2620:1b4::/324.3B × /64ARINUS29th Apr 2020
2620:1b5::/324.3B × /64ARINUS31st Jul 2020
2620:1b6::/324.3B × /64ARINUS16th Dec 2020
2620:1b8::/324.3B × /64ARINUS16th Mar 2021
2620:1b9::/324.3B × /64ARINUS16th Mar 2021
2620:1b:4000::/4865.5k × /64ARINUS26th Feb 2013
2620:1b:e000::/4865.5k × /64ARINUS20th Apr 2017
2620:1ba::/36268M × /64ARINUS2nd Apr 2021
2620:1be::/36268M × /64ARINUS2nd Jun 2021
2620:1bf::/36268M × /64ARINUS17th Sept 2021
2620:1c0::/2868.7B × /64ARINUS14th Nov 2011
2620:1c:2000::/4865.5k × /64ARINUS26th Apr 2017
2620:1c:4000::/4865.5k × /64ARINUS4th Mar 2013
2620:1c:6000::/4865.5k × /64ARINUS27th Apr 2017
2620:1c:8000::/4865.5k × /64ARINUS18th Apr 2011
2620:1c::/4865.5k × /64ARINUS15th Apr 2010
2620:1c:a000::/4865.5k × /64ARINUS28th Apr 2017
2620:1c:c000::/4865.5k × /64ARINUS4th Mar 2013