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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,434 blocks match, ordered by prefix.

Allocated but unannounced blocks, 27451 to 27500 of 30434
PrefixAddressesRegistryCountryAllocated
2620:10:c000::/4865.5k × /64ARINUS4th Dec 2012
2620:10:e000::/4865.5k × /64ARINUS6th Jan 2017
2620:10a:1000::/441M × /64ARINUS18th Jan 2012
2620:10a:2000::/441M × /64ARINUS19th Jan 2012
2620:10a:3000::/4016.8M × /64ARINUS19th Jan 2012
2620:10a:5000::/4016.8M × /64ARINUS20th Jan 2012
2620:10a:9000::/4016.8M × /64ARINUS30th Jan 2012
2620:10a:c000::/441M × /64ARINUS7th Jul 2026
2620:10a:d000::/441M × /64ARINUS10th Feb 2012
2620:10a:f000::/4016.8M × /64ARINUS16th Feb 2012
2620:10b:1000::/4016.8M × /64ARINUS28th Feb 2012
2620:10b:3000::/4016.8M × /64ARINCA29th Feb 2012
2620:10b:5000::/441M × /64ARINUS7th Mar 2012
2620:10b:6000::/4016.8M × /64ARINUS8th Mar 2012
2620:10b:9000::/441M × /64ARINUS21st Mar 2012
2620:10b::/441M × /64ARINUS27th Feb 2012
2620:10b:a000::/441M × /64ARINUS26th Mar 2012
2620:10b:c000::/4016.8M × /64ARINUS4th Apr 2012
2620:10b:d000::/441M × /64ARINUS4th Apr 2012
2620:10b:e000::/4016.8M × /64ARINUS6th Apr 2012
2620:10b:f000::/4016.8M × /64ARINUS6th Apr 2012
2620:10c:1000::/4016.8M × /64ARINUS9th Apr 2012
2620:10c:3000::/441M × /64ARINUS16th Apr 2012
2620:10c:4000::/441M × /64ARINUS19th Apr 2012
2620:10c:5000::/441M × /64ARINUS23rd Apr 2012
2620:10c:9000::/4016.8M × /64ARINUS30th Apr 2012
2620:10c::/441M × /64ARINUS9th Apr 2012
2620:10c:a000::/441M × /64ARINUS7th May 2012
2620:10c:b000::/4016.8M × /64ARINUS7th May 2012
2620:10c:c000::/4016.8M × /64ARINUS11th May 2012
2620:10c:d000::/441M × /64ARINUS14th May 2012
2620:10c:f000::/4016.8M × /64ARINCA18th May 2012
2620:10d:3000::/441M × /64ARINUS24th May 2012
2620:10d:5000::/4016.8M × /64ARINUS29th May 2012
2620:10d:7000::/4016.8M × /64ARINUS6th Jun 2012
2620:10d:8000::/441M × /64ARINUS7th Jun 2012
2620:10d:a000::/4016.8M × /64ARINUS11th Jun 2012
2620:10d:b000::/4016.8M × /64ARINUS11th Jun 2012
2620:10d:e000::/441M × /64ARINCA13th Jun 2012
2620:10e:1000::/441M × /64ARINUS18th Jun 2012
2620:10e:2000::/441M × /64ARINUS21st Jun 2012
2620:10e:3000::/4016.8M × /64ARINUS25th Jun 2012
2620:10e:4000::/4016.8M × /64ARINUS26th Jun 2012
2620:10e:5000::/441M × /64ARINUS28th Jun 2012
2620:10e:7000::/4016.8M × /64ARINUS2nd Jul 2012
2620:10e:8000::/4016.8M × /64ARINUS5th Jul 2012
2620:10e:9000::/441M × /64ARINUS6th Jul 2012
2620:10e::/441M × /64ARINUS18th Jun 2012
2620:10e:a000::/441M × /64ARINUS10th Jul 2012
2620:10e:b000::/4016.8M × /64ARINUS12th Jul 2012