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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,441 blocks match, ordered by prefix.

Allocated but unannounced blocks, 25551 to 25600 of 30441
PrefixAddressesRegistryCountryAllocated
2604:50c0::/324.3B × /64ARINUS3rd Jul 2017
2604:5100::/324.3B × /64ARINUS7th Apr 2011
2604:5140::/324.3B × /64ARINCA3rd Jul 2017
2604:5180::/324.3B × /64ARINUS19th Aug 2026
2604:5280::/324.3B × /64ARINCA2nd Jan 2013
2604:52c0::/324.3B × /64ARINUS6th Jul 2017
2604:5300::/324.3B × /64ARINUS7th Apr 2011
2604:5380::/324.3B × /64ARINCA2nd Jan 2013
2604:53c0::/324.3B × /64ARINUS7th Jul 2017
2604:5440::/324.3B × /64ARINUS7th Jul 2017
2604:54c0::/324.3B × /64ARINUS10th Jul 2017
2604:5580::/324.3B × /64ARINCA4th Jan 2013
2604:560::/324.3B × /64ARINUS25th Feb 2025
2604:5740::/324.3B × /64ARINUS18th Jul 2017
2604:5880::/324.3B × /64ARINCA7th Jan 2013
2604:58c0::/324.3B × /64ARINUS19th Jul 2017
2604:5900::/324.3B × /64ARINUS13th Jan 2026
2604:59c0::/324.3B × /64ARINUS20th Jul 2017
2604:5a40::/324.3B × /64ARINCA25th Jul 2017
2604:5a80::/324.3B × /64ARINUS14th Jan 2013
2604:5ac0::/324.3B × /64ARINUS28th Jul 2017
2604:5b40::/324.3B × /64ARINUS31st Jul 2017
2604:5bc0::/324.3B × /64ARINUS31st Jul 2017
2604:5c0::/324.3B × /64ARINUS3rd Jan 2017
2604:5c40::/324.3B × /64ARINCA2nd Aug 2017
2604:5d40::/324.3B × /64ARINUS3rd Aug 2017
2604:5dc0::/324.3B × /64ARINUS4th Aug 2017
2604:5e00::/324.3B × /64ARINUS3rd Nov 2010
2604:5e0::/324.3B × /64ARINUS28th Feb 2025
2604:5f40::/324.3B × /64ARINUS11th Aug 2017
2604:5fc0::/324.3B × /64ARINUS14th Aug 2017
2604:600::/324.3B × /64ARINUS19th Oct 2010
2604:6100::/324.3B × /64ARINUS11th Apr 2011
2604:6180::/324.3B × /64ARINUS25th Jan 2013
2604:6200::/324.3B × /64ARINUS4th Nov 2010
2604:620::/324.3B × /64ARINUS28th Feb 2025
2604:6240::/324.3B × /64ARINUS21st Aug 2017
2604:62c0::/324.3B × /64ARINUS21st Aug 2017
2604:6380::/324.3B × /64ARINUS30th Jan 2013
2604:6480::/324.3B × /64ARINUS31st Jan 2013
2604:6500::/324.3B × /64ARINCA11th Apr 2011
2604:6540::/324.3B × /64ARINUS28th Dec 2023
2604:660::/36268M × /64ARINUS3rd Mar 2025
2604:66c0::/324.3B × /64ARINUS30th Aug 2017
2604:6700::/324.3B × /64ARINUS14th Apr 2011
2604:6880::/324.3B × /64ARINCA8th Feb 2013
2604:68c0::/324.3B × /64ARINUS5th Sept 2017
2604:6a00::/324.3B × /64ARINUS4th Nov 2010
2604:6a0::/324.3B × /64ARINUS3rd Mar 2025
2604:6a40::/324.3B × /64ARINUS7th Sept 2017