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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.

Unannounced blocks in United States

26,936 blocks match, ordered by prefix.

Allocated but unannounced blocks, 15051 to 15100 of 26936
PrefixAddressesRegistryCountryAllocated
2001:3540::/2934.4B × /64RIPE NCCUS12th Sept 2024
2001:38c0::/324.3B × /64RIPE NCCUS17th Sept 2024
2001:408::/324.3B × /64ARINUS2nd Feb 2010
2001:440::/324.3B × /64ARINUS29th Sept 2000
2001:478::/324.3B × /64ARINUS8th Oct 2026
2001:4808::/324.3B × /64ARINUS15th Dec 2004
2001:48a0::/324.3B × /64ARINUS25th Apr 2005
2001:48b8::/324.3B × /64ARINUS13th May 2005
2001:490::/324.3B × /64ARINUS11th Jul 2001
2001:4918::/324.3B × /64ARINUS14th Jul 2005
2001:4920::/324.3B × /64ARINUS21st Jul 2005
2001:4960::/324.3B × /64ARINUS3rd Oct 2005
2001:4980::/324.3B × /64ARINUS25th Oct 2005
2001:4990::/324.3B × /64ARINUS26th Oct 2005
2001:49a0::/324.3B × /64ARINUS27th Oct 2005
2001:49a8::/324.3B × /64ARINUS27th Oct 2005
2001:49c0::/324.3B × /64ARINUS2nd Nov 2005
2001:49d8::/324.3B × /64ARINUS22nd Nov 2005
2001:49e0::/324.3B × /64ARINUS23rd Nov 2005
2001:4b0::/324.3B × /64ARINUS13th Nov 2001
2001:4f0::/324.3B × /64ARINUS3rd Feb 2010
2001:500:100::/45524k × /64ARINUS22nd Aug 2011
2001:500:108::/47131k × /64ARINUS22nd Aug 2011
2001:500:11::/4865.5k × /64ARINUS29th Nov 2006
2001:500:30::/4865.5k × /64ARINUS5th Mar 2008
2001:500:4431::/4865.5k × /64ARINUS18th May 2010
2001:500:56::/4865.5k × /64ARINUS26th Nov 2008
2001:500:6::/47131k × /64ARINUS19th Oct 2006
2001:500:6f::/4865.5k × /64ARINUS9th Jan 2009
2001:500:7c::/4865.5k × /64ARINUS9th Jan 2009
2001:500:85::/4865.5k × /64ARINUS11th Feb 2010
2001:500:90::/45524k × /64ARINUS26th May 2010
2001:500:98::/4865.5k × /64ARINUS4th Jun 2010
2001:501:973c::/4865.5k × /64ARINUS8th Oct 2010
2001:502:63bd::/4865.5k × /64ARINUS8th Oct 2010
2001:502:7a71::/4865.5k × /64ARINUS30th Nov 2004
2001:502:cfb5::/4865.5k × /64ARINUS30th Nov 2004
2001:503:5419::/4865.5k × /64ARINUS18th May 2010
2001:503:5ae2::/4865.5k × /64ARINUS3rd Jun 2004
2001:503:6810::/4865.5k × /64ARINUS3rd Jun 2004
2001:503:7bbb::/4865.5k × /64ARINUS12th Aug 2004
2001:503:8028::/4865.5k × /64ARINUS13th Aug 2004
2001:503:91ef::/4865.5k × /64ARINUS18th May 2010
2001:503:a124::/4865.5k × /64ARINUS13th Aug 2004
2001:503:bfb0::/4865.5k × /64ARINUS18th May 2010
2001:503:c779::/4865.5k × /64ARINUS12th Aug 2004
2001:503:cc2c::/4865.5k × /64ARINUS3rd Jun 2004
2001:503:d1ae::/4865.5k × /64ARINUS13th Aug 2004
2001:503:e8ef::/4865.5k × /64ARINUS18th May 2010
2001:504:100::/4865.5k × /64ARINUS16th Jul 2020