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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,441 blocks match, ordered by prefix.

Allocated but unannounced blocks, 25701 to 25750 of 30441
PrefixAddressesRegistryCountryAllocated
2604:9f40::/324.3B × /64ARINUS6th Feb 2018
2604::/324.3B × /64ARINUS29th Jan 2010
2604:a000::/324.3B × /64ARINUS2nd Mar 2010
2604:a080::/324.3B × /64ARINUS3rd Apr 2013
2604:a20::/324.3B × /64ARINUS31st Mar 2025
2604:a2c0::/324.3B × /64ARINUS13th Feb 2018
2604:a3c0::/324.3B × /64ARINCA16th Feb 2018
2604:a40::/324.3B × /64ARINUS11th Jan 2017
2604:a480::/324.3B × /64ARINUS5th Apr 2013
2604:a4c0::/324.3B × /64ARINUS20th Feb 2018
2604:a500::/324.3B × /64ARINCA29th Jan 2026
2604:a600::/324.3B × /64ARINUS29th Jan 2026
2604:a60::/324.3B × /64ARINUS4th Apr 2025
2604:a680::/324.3B × /64ARINUS10th Apr 2013
2604:a6c0::/324.3B × /64ARINUS22nd Feb 2018
2604:a700::/324.3B × /64ARINUS2nd May 2011
2604:a740::/324.3B × /64ARINCA23rd Feb 2018
2604:a7c0::/324.3B × /64ARINUS23rd Feb 2018
2604:a800::/324.3B × /64ARINUS22nd Apr 2010
2604:a80::/324.3B × /64ARINUS15th Aug 2012
2604:a8c0::/324.3B × /64ARINCA26th Feb 2018
2604:a980::/324.3B × /64ARINUS17th Apr 2013
2604:a9c0::/324.3B × /64ARINUS27th Feb 2018
2604:aa00::/324.3B × /64ARINUS22nd Nov 2010
2604:aa40::/324.3B × /64ARINUS28th Feb 2018
2604:ab00::/324.3B × /64ARINUS3rd May 2011
2604:ab40::/324.3B × /64ARINUS2nd Mar 2018
2604:ac00::/324.3B × /64ARINUS6th Jul 2010
2604:ac40::/324.3B × /64ARINUS6th Mar 2018
2604:ac80::/324.3B × /64ARINUS18th Apr 2013
2604:ad80::/324.3B × /64ARINUS30th Apr 2014
2604:adc0::/324.3B × /64ARINUS8th Mar 2018
2604:ae40::/324.3B × /64ARINUS8th Mar 2018
2604:afc0::/324.3B × /64ARINUS13th Mar 2018
2604:b00::/324.3B × /64ARINUS10th Jul 2026
2604:b140::/324.3B × /64ARINUS13th Mar 2018
2604:b1c0::/324.3B × /64ARINUS14th Mar 2018
2604:b20::/324.3B × /64ARINUS10th Apr 2025
2604:b240::/324.3B × /64ARINUS14th Mar 2018
2604:b280::/324.3B × /64ARINCA26th Apr 2013
2604:b4c0::/324.3B × /64ARINUS22nd Mar 2018
2604:b560::/324.3B × /64ARINUS14th Jul 2026
2604:b60::/324.3B × /64ARINCA15th Apr 2025
2604:b620::/324.3B × /64ARINUS17th Jul 2026
2604:b6c0::/324.3B × /64ARINUS23rd Mar 2018
2604:b700::/324.3B × /64ARINUS6th May 2011
2604:b740::/324.3B × /64ARINUS26th Mar 2018
2604:b780::/36268M × /64ARINUS9th Feb 2016
2604:b7c0::/324.3B × /64ARINUS26th Mar 2018
2604:b880::/324.3B × /64ARINUS3rd May 2013