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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 7251 to 7300 of 26295
PrefixAddressesRegistryCountryAllocated
192.48.135.0/24256ARINUS21st Feb 1989
192.48.136.0/24256ARINUS22nd Aug 2014
192.48.137.0/24256ARINUS21st Feb 1989
192.48.139.0/24256ARINUS21st Feb 1989
192.48.140.0/24256ARINUS20th Aug 2014
192.48.143.0/24256ARINUS23rd Feb 1989
192.48.144.0/24256ARINUS24th Feb 1989
192.48.156.0/221kARINUS27th Feb 1989
192.48.192.0/204.1kARINUS27th Feb 1989
192.48.217.0/24256ARINUS1st Mar 1989
192.48.221.0/24256ARINUS6th Mar 1989
192.48.222.0/24256ARINUS6th Mar 1989
192.48.226.0/24256ARINUS10th Mar 1989
192.48.232.0/24256ARINUS12th Mar 1989
192.48.235.0/24256ARINUS14th Mar 1989
192.48.244.0/24256ARINUS23rd Mar 1989
192.48.245.0/24256ARINUS23rd Mar 1989
192.48.246.0/24256ARINUS23rd Mar 1989
192.48.247.0/24256ARINUS27th Mar 1989
192.48.249.0/24256ARINUS27th Mar 1989
192.48.250.0/24256ARINUS27th Mar 1989
192.48.251.0/24256ARINUS28th Mar 1989
192.48.252.0/24256ARINUS28th Mar 1989
192.48.254.0/24256ARINUS30th Mar 1989
192.48.30.0/24256ARINUS16th Jan 1989
192.48.33.0/24256ARINUS1st Jul 2026
192.48.34.0/24256ARINUS18th Jan 1989
192.48.36.0/24256ARINUS29th Aug 2025
192.48.38.0/23512ARINUS29th Aug 2025
192.48.40.0/212kARINUS25th Jan 1989
192.48.48.0/204.1kARINUS25th Jan 1989
192.48.64.0/212kARINUS25th Jan 1989
192.48.72.0/221kARINUS25th Jan 1989
192.48.76.0/24256ARINUS25th Jan 1989
192.48.77.0/24256ARINUS6th Feb 2026
192.48.81.0/24256ARINUS26th Jan 1989
192.48.84.0/221kARINUS30th Nov 2012
192.48.88.0/221kARINUS3rd Dec 2012
192.48.93.0/24256ARINUS30th Jan 1989
192.48.94.0/24256ARINUS31st Jan 1989
192.48.99.0/24256ARINUS2nd Feb 1989
192.5.10.0/24256ARINUS19th Jan 1983
192.5.100.0/24256ARINUS1st Nov 1985
192.5.103.0/24256ARINUS1st Nov 1989
192.5.105.0/24256ARINUS10th Aug 1984
192.5.107.0/24256ARINUS8th Oct 1984
192.5.108.0/24256ARINUS8th Oct 1984
192.5.111.0/24256ARINUS7th Jul 1988
192.5.112.0/24256ARINUS7th Jul 1988
192.5.13.0/24256ARINUS4th Apr 1983