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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,283 blocks match, ordered by prefix.

Allocated but unannounced blocks, 21901 to 21950 of 26283
PrefixAddressesRegistryCountryAllocated
2604:6c00::/324.3B × /64ARINUS24th Jun 2010
2604:6c0::/324.3B × /64ARINUS4th Jan 2017
2604:6c40::/324.3B × /64ARINUS14th Sept 2017
2604:6dc0::/324.3B × /64ARINUS20th Sept 2017
2604:6e0::/324.3B × /64ARINUS4th Mar 2025
2604:6e80::/324.3B × /64ARINUS14th Feb 2013
2604:6f40::/324.3B × /64ARINUS27th Sept 2017
2604:6f80::/324.3B × /64ARINUS14th Feb 2013
2604:7000::/324.3B × /64ARINUS15th Jan 2026
2604:7040::/324.3B × /64ARINUS28th Sept 2017
2604:70::/324.3B × /64ARINUS21st Jan 2025
2604:720::/324.3B × /64ARINUS6th Mar 2025
2604:7240::/324.3B × /64ARINUS6th Oct 2017
2604:7340::/324.3B × /64ARINUS11th Oct 2017
2604:73c0::/324.3B × /64ARINUS16th Jan 2026
2604:740::/324.3B × /64ARINUS6th Jan 2017
2604:74c0::/324.3B × /64ARINUS12th Oct 2017
2604:7540::/324.3B × /64ARINUS12th Oct 2017
2604:7600::/2868.7B × /64ARINUS9th Nov 2010
2604:760::/324.3B × /64ARINUS6th Mar 2025
2604:7680::/324.3B × /64ARINUS21st Feb 2013
2604:7700::/324.3B × /64ARINUS21st Apr 2011
2604:7740::/324.3B × /64ARINUS16th Oct 2017
2604:7800::/324.3B × /64ARINUS20th Apr 2010
2604:7880::/324.3B × /64ARINUS21st Feb 2013
2604:7900::/324.3B × /64ARINUS21st Apr 2011
2604:7940::/324.3B × /64ARINUS19th Oct 2017
2604:79c0::/324.3B × /64ARINUS19th Oct 2017
2604:7cc0::/324.3B × /64ARINUS31st Oct 2017
2604:7d80::/324.3B × /64ARINUS26th Feb 2013
2604:7e0::/324.3B × /64ARINUS12th Mar 2025
2604:7e40::/324.3B × /64ARINUS8th Nov 2017
2604:7e80::/324.3B × /64ARINUS27th Feb 2013
2604:800::/324.3B × /64ARINUS13th Apr 2010
2604:8040::/324.3B × /64ARINUS13th Nov 2017
2604:80c0::/324.3B × /64ARINUS15th Nov 2017
2604:8180::/318.6B × /64ARINUS4th Feb 2014
2604:8300::/324.3B × /64ARINUS21st Jan 2026
2604:83c0::/324.3B × /64ARINUS22nd Nov 2017
2604:860::/324.3B × /64ARINUS14th Mar 2025
2604:8640::/324.3B × /64ARINUS30th Nov 2017
2604:8700::/36268M × /64ARINUS26th Apr 2011
2604:8780::/324.3B × /64ARINUS7th Mar 2013
2604:87c0::/324.3B × /64ARINUS4th Dec 2017
2604:8840::/324.3B × /64ARINUS5th Dec 2017
2604:88c0::/324.3B × /64ARINUS5th Dec 2017
2604:8940::/324.3B × /64ARINUS7th Dec 2017
2604:8a40::/324.3B × /64ARINUS8th Dec 2017
2604:8ac0::/324.3B × /64ARINUS12th Dec 2017
2604:8bc0::/324.3B × /64ARINUS14th Dec 2017