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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,456 blocks match, ordered by prefix.

Allocated but unannounced blocks, 8151 to 8200 of 30456
PrefixAddressesRegistryCountryAllocated
192.54.134.0/24256ARINUS8th Jun 1989
192.54.138.0/24256ARINUS12th Jun 1989
192.54.16.0/212kARINUS18th May 1989
192.54.226.0/24256ARINUS15th Jun 1989
192.54.228.0/24256ARINUS19th Jun 1989
192.54.230.0/23512ARINUS20th Jun 1989
192.54.232.0/221kARINUS20th Jun 1989
192.54.236.0/23512ARINUS20th Jun 1989
192.54.238.0/24256ARINUS20th Jun 1989
192.54.239.0/24256ARINUS20th Jun 1989
192.54.24.0/221kARINUS18th May 1989
192.54.241.0/24256ARINUS26th Jun 1990
192.54.246.0/24256ARINUS26th Jun 1989
192.54.248.0/24256ARINUS27th Jun 1989
192.54.249.0/24256ARINUS28th Jun 1989
192.54.250.0/24256ARINUS26th Jun 1990
192.54.253.0/24256ARINUS26th Jun 1990
192.54.28.0/23512ARINUS18th May 1989
192.54.30.0/24256ARINUS18th May 1989
192.54.81.0/24256ARINUS2nd Apr 2026
192.54.82.0/24256ARINUS31st May 1989
192.54.83.0/24256ARINUS31st May 1989
192.54.84.0/24256ARINUS31st May 1989
192.54.85.0/24256ARINUS31st May 1989
192.54.86.0/24256ARINUS31st May 1989
192.54.87.0/24256ARINUS31st May 1989
192.54.88.0/24256ARINUS31st May 1989
192.55.0.0/24256ARINUS29th Aug 2014
192.55.1.0/24256ARINUS23rd Jun 1989
192.55.102.0/24256ARINUS17th Jul 1989
192.55.107.0/24256ARINUS20th Jul 1989
192.55.111.0/24256ARINUS21st Jul 1989
192.55.113.0/24256ARINUS24th Jul 1989
192.55.121.0/24256ARINUS31st Jul 1989
192.55.122.0/23512ARINUS1st Aug 1989
192.55.124.0/24256ARINUS1st Aug 1989
192.55.125.0/24256ARINUS2nd Aug 1989
192.55.126.0/24256ARINUS2nd Aug 1989
192.55.127.0/24256ARINUS2nd Aug 1989
192.55.130.0/24256ARINCA9th Sept 2014
192.55.131.0/24256ARINUS3rd Aug 1989
192.55.135.0/24256ARINUS7th Aug 1989
192.55.136.0/24256ARINUS1st Jul 2026
192.55.187.0/24256ARINUS8th Aug 1989
192.55.189.0/24256ARINUS8th Aug 1989
192.55.194.0/24256ARINCA15th Aug 1989
192.55.196.0/24256ARINUS16th Aug 1989
192.55.199.0/24256ARINUS17th Aug 1989
192.55.200.0/24256ARINUS12th Sept 2014
192.55.201.0/24256ARINUS22nd Aug 1989