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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,470 blocks match, ordered by prefix.

Allocated but unannounced blocks, 16951 to 17000 of 30470
PrefixAddressesRegistryCountryAllocated
2001:504:3e::/4865.5k × /64ARINJM11th Jul 2014
2001:504:3f::/4865.5k × /64ARINUS16th Sept 2014
2001:504:40::/4865.5k × /64ARINUS16th Sept 2014
2001:504:41::/4865.5k × /64ARINUS17th Oct 2014
2001:504:44::/4865.5k × /64ARINUS8th Jan 2015
2001:504:45::/4865.5k × /64ARINUS10th Mar 2015
2001:504:46::/4865.5k × /64ARINCA31st Mar 2015
2001:504:47::/4865.5k × /64ARINUS7th May 2015
2001:504:58::/4865.5k × /64ARINUS16th Dec 2015
2001:504:59::/4865.5k × /64ARINUS8th Feb 2016
2001:504:60::/4865.5k × /64ARINUS22nd Feb 2016
2001:504:61::/4865.5k × /64ARINUS10th Mar 2016
2001:504:63::/4865.5k × /64ARINDM13th Apr 2016
2001:504:64::/4865.5k × /64ARINUS3rd Jun 2016
2001:504:65::/4865.5k × /64ARINUS24th Oct 2016
2001:504:67::/4865.5k × /64ARINUS31st Jan 2017
2001:504:68::/4865.5k × /64ARINUS31st Jan 2017
2001:504:69::/4865.5k × /64ARINCA3rd Mar 2017
2001:504:70::/4865.5k × /64ARINUS13th Jun 2017
2001:504:71::/4865.5k × /64ARINUS15th Jun 2017
2001:504:72::/4865.5k × /64ARINUS9th Aug 2017
2001:504:73::/4865.5k × /64ARINCA29th Aug 2017
2001:504:74::/4865.5k × /64ARINUS11th Sept 2017
2001:504:75::/4865.5k × /64ARINUS13th Sept 2017
2001:504:76::/4865.5k × /64ARINUS23rd Oct 2017
2001:504:77::/4865.5k × /64ARINUS9th Nov 2017
2001:504:78::/4865.5k × /64ARINUS21st Nov 2017
2001:504:79::/4865.5k × /64ARINUS21st Nov 2017
2001:504:80::/441M × /64ARINUS24th Oct 2017
2001:504:90::/4865.5k × /64ARINUS7th Feb 2018
2001:504:91::/4865.5k × /64ARINUS9th Jul 2018
2001:504:92::/4865.5k × /64ARINUS20th Nov 2018
2001:504:93::/4865.5k × /64ARINVG30th Nov 2018
2001:504:94::/4865.5k × /64ARINUS9th Jan 2019
2001:504:95::/4865.5k × /64ARINUS9th Jan 2019
2001:504:96::/4865.5k × /64ARINCA25th Jan 2019
2001:504:97::/4865.5k × /64ARINUS29th Jan 2019
2001:504:98::/4865.5k × /64ARINUS6th May 2019
2001:504:99::/4865.5k × /64ARINUS30th May 2019
2001:504:9a::/4865.5k × /64ARINUS5th Aug 2019
2001:504:9b::/4865.5k × /64ARINUS6th Aug 2019
2001:504:9c::/4865.5k × /64ARINCA8th Jan 2020
2001:504:9d::/4865.5k × /64ARINUS28th Jan 2020
2001:504:9e::/4865.5k × /64ARINUS30th Jan 2020
2001:504:9f::/4865.5k × /64ARINUS28th Oct 2025
2001:504::/4865.5k × /64ARINUS14th Oct 2002
2001:504:a0::/4865.5k × /64ARINUS5th May 2020
2001:504:a::/4865.5k × /64ARINUS5th Aug 2004
2001:504:c::/4865.5k × /64ARINUS10th Jun 2005
2001:504:d::/4865.5k × /64ARINUS29th Jun 2006