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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,441 blocks match, ordered by prefix.

Allocated but unannounced blocks, 4601 to 4650 of 30441
PrefixAddressesRegistryCountryAllocated
192.139.31.0/24256ARINCA26th Feb 1992
192.139.32.0/24256ARINCA26th Feb 1992
192.139.37.0/24256ARINCA3rd Oct 2024
192.139.4.0/24256ARINCA24th Jan 1992
192.139.42.0/24256ARINCA1st Dec 1995
192.139.43.0/24256ARINCA17th May 1994
192.139.44.0/24256ARINCA3rd Mar 1992
192.139.45.0/24256ARINCA10th Mar 1992
192.139.63.0/24256ARINCA19th Mar 1992
192.139.64.0/24256ARINCA19th Mar 1992
192.139.65.0/24256ARINCA19th Mar 1992
192.139.66.0/24256ARINCA19th Mar 1992
192.139.67.0/24256ARINCA19th Mar 1992
192.139.68.0/24256ARINCA19th Mar 1992
192.139.72.0/24256ARINCA1st Apr 1992
192.139.73.0/24256ARINCA2nd Apr 1992
192.139.74.0/24256ARINCA12th Apr 1993
192.139.75.0/24256ARINCA23rd Nov 1992
192.139.77.0/24256ARINCA24th Apr 1992
192.139.8.0/24256ARINCA3rd Nov 1992
192.139.82.0/24256ARINCA18th Feb 1996
192.139.84.0/221kARINCA13th May 1992
192.139.88.0/212kARINCA13th May 1992
192.139.9.0/24256ARINCA28th Jan 1992
192.139.96.0/204.1kARINCA13th May 1992
192.140.0.0/24256ARINUS25th Jun 2020
192.146.100.0/24256ARINUS14th May 1992
192.146.102.0/24256ARINUS22nd Jan 1992
192.146.103.0/24256ARINUS22nd Jan 1992
192.146.104.0/24256ARINUS24th Jan 1992
192.146.105.0/24256ARINUS22nd Jan 1992
192.146.106.0/24256ARINUS22nd Jan 1992
192.146.107.0/24256ARINUS22nd Jan 1992
192.146.108.0/24256ARINUS22nd Jan 1992
192.146.113.0/24256ARINUS14th May 2015
192.146.114.0/24256ARINUS23rd Jan 1992
192.146.120.0/24256ARINUS23rd Jan 1992
192.146.121.0/24256ARINUS23rd Jan 1992
192.146.122.0/24256ARINUS13th May 1992
192.146.127.0/24256ARINUS24th Jan 1992
192.146.128.0/24256ARINUS24th Jan 1992
192.146.129.0/24256ARINUS24th Jan 1992
192.146.143.0/24256ARINUS28th Jan 1992
192.146.144.0/24256ARINUS28th Jan 1992
192.146.145.0/24256ARINUS28th Jan 1992
192.146.146.0/24256ARINUS28th Jan 1992
192.146.147.0/24256ARINUS28th Jan 1992
192.146.149.0/24256ARINUS1st Jul 2026
192.146.151.0/24256ARINUS30th Jan 1992
192.146.153.0/24256ARINUS30th Jan 1992