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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,295 blocks match, ordered by prefix.

Allocated but unannounced blocks, 6851 to 6900 of 26295
PrefixAddressesRegistryCountryAllocated
192.31.218.0/24256ARINUS8th Sept 1987
192.31.219.0/24256ARINUS8th Sept 1987
192.31.220.0/24256ARINUS8th Sept 1987
192.31.221.0/24256ARINUS8th Sept 1987
192.31.223.0/24256ARINUS17th Aug 1988
192.31.230.0/24256ARINUS11th Sept 1987
192.31.232.0/24256ARINUS16th Sept 1987
192.31.233.0/24256ARINUS19th Sept 1987
192.31.235.0/24256ARINUS22nd Sept 1987
192.31.24.0/24256ARINUS22nd Apr 1987
192.31.240.0/24256ARINUS23rd Sept 1987
192.31.244.0/24256ARINUS30th Apr 2014
192.31.246.0/24256ARINUS22nd Mar 2017
192.31.247.0/24256ARINUS9th Oct 1987
192.31.249.0/24256ARINUS4th Oct 1987
192.31.25.0/24256ARINUS9th Feb 1988
192.31.250.0/24256ARINUS9th Oct 1987
192.31.255.0/24256ARINUS1st Jul 2026
192.31.28.0/24256ARINUS22nd Apr 1987
192.31.29.0/24256ARINUS17th Jan 2025
192.31.3.0/24256ARINUS8th Apr 1993
192.31.30.0/24256ARINUS22nd Apr 1987
192.31.37.0/24256ARINUS6th Apr 1987
192.31.38.0/24256ARINUS15th Apr 1987
192.31.39.0/24256ARINUS18th May 1988
192.31.42.0/24256ARINUS8th Mar 1991
192.31.44.0/24256ARINUS13th Mar 1991
192.31.45.0/24256ARINUS13th Mar 1991
192.31.48.0/24256ARINUS8th Feb 1995
192.31.5.0/24256ARINUS12th Mar 1987
192.31.63.0/24256ARINUS8th May 1987
192.31.64.0/24256ARINUS8th May 1987
192.31.65.0/24256ARINUS8th May 1987
192.31.66.0/24256ARINUS8th May 1987
192.31.67.0/24256ARINUS8th May 1987
192.31.68.0/24256ARINUS8th May 1987
192.31.69.0/24256ARINUS8th May 1987
192.31.7.0/24256ARINUS29th Jun 1987
192.31.70.0/24256ARINUS8th May 1987
192.31.71.0/24256ARINUS8th May 1987
192.31.72.0/24256ARINUS8th May 1987
192.31.73.0/24256ARINUS8th May 1987
192.31.77.0/24256ARINUS10th May 1987
192.31.78.0/24256ARINUS10th May 1987
192.31.79.0/24256ARINUS14th May 1987
192.31.81.0/24256ARINUS18th May 1988
192.31.84.0/24256ARINUS22nd May 1987
192.31.85.0/24256ARINUS2nd Jun 1997
192.31.86.0/24256ARINUS2nd Jun 1997
192.31.90.0/24256ARINUS5th Jun 1987