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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 23651 to 23700 of 26277
PrefixAddressesRegistryCountryAllocated
2620:117:4000::/441M × /64ARINUS22nd Oct 2013
2620:117:6000::/4016.8M × /64ARINUS5th Nov 2013
2620:117:7000::/4016.8M × /64ARINUS5th Nov 2013
2620:117:8000::/4016.8M × /64ARINUS19th Nov 2013
2620:117:a000::/4016.8M × /64ARINUS22nd Nov 2013
2620:117:e000::/4016.8M × /64ARINUS6th Jan 2014
2620:118:1000::/4016.8M × /64ARINUS29th Jan 2014
2620:118:6000::/4016.8M × /64ARINUS18th Feb 2014
2620:118:7000::/441M × /64ARINUS21st Feb 2014
2620:118:9000::/441M × /64ARINUS28th Feb 2014
2620:118:a000::/441M × /64ARINUS4th Mar 2014
2620:118:c000::/4016.8M × /64ARINUS6th Mar 2014
2620:118:d000::/441M × /64ARINUS12th Mar 2014
2620:118:f000::/4016.8M × /64ARINUS4th Apr 2014
2620:119:2000::/441M × /64ARINUS2nd May 2014
2620:119:3000::/4016.8M × /64ARINUS5th May 2014
2620:119:6000::/441M × /64ARINUS21st May 2014
2620:119:7000::/4016.8M × /64ARINUS21st May 2014
2620:119:8000::/441M × /64ARINUS28th May 2014
2620:119:9000::/4016.8M × /64ARINUS30th May 2014
2620:119:a000::/441M × /64ARINUS3rd Jun 2014
2620:119:b000::/441M × /64ARINUS3rd Jun 2014
2620:119:c000::/441M × /64ARINUS4th Jun 2014
2620:119:d000::/4016.8M × /64ARINUS4th Jun 2014
2620:11:4000::/4865.5k × /64ARINUS10th Jun 2013
2620:11:6000::/4865.5k × /64ARINUS11th Jan 2017
2620:11:8000::/4865.5k × /64ARINUS6th Jun 2025
2620:11a:3000::/4016.8M × /64ARINUS16th Jun 2014
2620:11a:4000::/4016.8M × /64ARINUS16th Jun 2014
2620:11a:7000::/441M × /64ARINUS17th Jun 2014
2620:11a:8000::/441M × /64ARINUS19th Jun 2014
2620:11a:9000::/441M × /64ARINUS23rd Jun 2014
2620:11a:e000::/441M × /64ARINUS16th Jul 2014
2620:11a:f000::/36268M × /64ARINUS18th Jul 2014
2620:11b:1000::/4016.8M × /64ARINUS22nd Jul 2014
2620:11b:2000::/4016.8M × /64ARINUS24th Jul 2014
2620:11b:5000::/441M × /64ARINUS25th Jul 2014
2620:11b:6000::/441M × /64ARINUS31st Jul 2014
2620:11b:8000::/4016.8M × /64ARINUS4th Aug 2014
2620:11b:9000::/441M × /64ARINUS8th Aug 2014
2620:11b::/4016.8M × /64ARINUS22nd Jul 2014
2620:11b:a000::/441M × /64ARINUS11th Aug 2014
2620:11b:b000::/441M × /64ARINUS12th Aug 2014
2620:11b:c000::/441M × /64ARINUS12th Aug 2014
2620:11c:7000::/441M × /64ARINUS18th Sept 2014
2620:11c:b000::/441M × /64ARINUS14th Oct 2014
2620:11c:d000::/441M × /64ARINUS24th Oct 2014
2620:11c:e000::/441M × /64ARINUS28th Oct 2014
2620:11d:1000::/441M × /64ARINUS7th Nov 2014
2620:11d:7000::/441M × /64ARINUS16th Dec 2014