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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,315 blocks match, ordered by prefix.

Allocated but unannounced blocks, 15001 to 15050 of 26315
PrefixAddressesRegistryCountryAllocated
2001:504:127::/4865.5k × /64ARINUS29th Nov 2022
2001:504:128::/4865.5k × /64ARINUS12th Jan 2023
2001:504:129::/4865.5k × /64ARINUS20th Jan 2023
2001:504:12::/4865.5k × /64ARINUS29th Jun 2006
2001:504:131::/4865.5k × /64ARINUS8th Aug 2023
2001:504:133::/4865.5k × /64ARINUS6th Oct 2023
2001:504:136::/4865.5k × /64ARINUS13th Dec 2023
2001:504:137::/4865.5k × /64ARINUS21st Dec 2023
2001:504:138::/4865.5k × /64ARINUS28th Dec 2023
2001:504:13::/4865.5k × /64ARINUS29th Jan 2007
2001:504:13a::/4865.5k × /64ARINUS20th Mar 2024
2001:504:13b::/4865.5k × /64ARINUS19th Apr 2024
2001:504:13d::/4865.5k × /64ARINUS28th Jun 2024
2001:504:13e::/4865.5k × /64ARINUS18th Jul 2024
2001:504:13f::/4865.5k × /64ARINUS3rd Sept 2024
2001:504:14::/4865.5k × /64ARINUS29th Jun 2020
2001:504:16::/4865.5k × /64ARINUS12th Feb 2009
2001:504:17::/4865.5k × /64ARINUS2nd Jul 2009
2001:504:18::/4865.5k × /64ARINUS4th Aug 2009
2001:504:1::/4865.5k × /64ARINUS14th Oct 2002
2001:504:1b::/4865.5k × /64ARINUS23rd Jun 2010
2001:504:1c::/4865.5k × /64ARINUS6th Dec 2010
2001:504:24::/4865.5k × /64ARINUS14th Feb 2012
2001:504:27::/4865.5k × /64ARINUS9th Aug 2012
2001:504:28::/4865.5k × /64ARINUS20th Sept 2012
2001:504:29::/4865.5k × /64ARINUS22nd Oct 2012
2001:504:30::/4865.5k × /64ARINUS31st Oct 2013
2001:504:31::/4865.5k × /64ARINUS13th Nov 2013
2001:504:33::/4865.5k × /64ARINUS26th Nov 2013
2001:504:36::/4865.5k × /64ARINUS29th Jan 2014
2001:504:3b::/4865.5k × /64ARINUS23rd May 2014
2001:504:3c::/4865.5k × /64ARINUS28th May 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
2001:504:47::/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
2001:504:64::/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
2001:504:70::/4865.5k × /64ARINUS13th Jun 2017
2001:504:71::/4865.5k × /64ARINUS15th Jun 2017
2001:504:72::/4865.5k × /64ARINUS9th Aug 2017
2001:504:74::/4865.5k × /64ARINUS11th Sept 2017