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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,971 blocks match, ordered by prefix.

Allocated but unannounced blocks, 401 to 450 of 26971
PrefixAddressesRegistryCountryAllocated
131.150.52.0/23512ARINUS27th Nov 2017
131.150.54.0/24256ARINUS27th Nov 2017
131.150.55.0/24256ARINUS23rd Nov 1988
131.150.56.0/221kARINUS27th Nov 2017
131.150.6.0/24256ARINUS27th Nov 2017
131.150.60.0/23512ARINUS27th Nov 2017
131.150.62.0/24256ARINUS23rd Nov 1988
131.150.63.0/24256ARINUS27th Nov 2017
131.150.7.0/24256ARINUS23rd Nov 1988
131.150.8.0/23512ARINUS27th Nov 2017
131.150.80.0/221kARINUS23rd Nov 1988
131.153.248.0/24256ARINUS16th Jan 2018
131.153.249.0/24256ARINUS13th Jan 2026
131.153.252.0/221kARINUS20th Dec 2017
131.157.0.0/1665.5kARINUS6th Dec 1988
131.162.240.0/204.1kARINUS22nd Oct 2026
131.192.0.0/1665.5kARINUS4th Jan 1989
131.208.0.0/1665.5kARINUS16th Jan 1989
131.209.0.0/1665.5kARINUS16th Jan 1989
131.222.144.0/204.1kRIPE NCCUS6th Apr 1990
131.223.0.0/1665.5kARINUS27th Jul 2018
131.253.0.0/24256ARINUS13th Feb 1989
131.253.10.0/23512ARINUS13th Feb 1989
131.253.16.0/23512ARINUS22nd Jun 2011
131.253.18.0/24256ARINUS22nd Jun 2011
131.253.19.0/24256ARINUS13th Feb 1989
131.253.2.0/24256ARINUS13th Feb 1989
131.253.20.0/24256ARINUS13th Feb 1989
131.253.22.0/23512ARINUS22nd Jun 2011
131.253.4.0/24256ARINUS13th Feb 1989
131.253.48.0/212kARINUS13th Feb 1989
131.253.56.0/221kARINUS13th Feb 1989
131.253.60.0/24256ARINUS13th Feb 1989
131.253.7.0/24256ARINUS13th Feb 1989
131.253.9.0/24256ARINUS13th Feb 1989
131.90.0.0/1665.5kARINUS31st Oct 1988
132.152.0.0/1665.5kARINUS17th Feb 1989
132.158.0.0/1665.5kARINUS22nd Feb 1989
132.173.0.0/1665.5kARINUS28th Feb 1989
132.192.0.0/1665.5kARINUS24th Oct 2024
132.201.0.0/1665.5kARINUS14th Mar 1989
132.224.0.0/1665.5kARINUS17th Mar 1989
132.233.0.0/1665.5kARINUS23rd Mar 1989
132.237.0.0/1732.8kARINUS24th Mar 1989
132.240.0.0/1665.5kARINUS27th Mar 1989
132.243.32.0/198.2kARINUS29th Mar 1989
132.253.0.0/1665.5kARINUS5th Apr 1989
134.116.0.0/1665.5kARINUS25th May 1989
134.120.0.0/1665.5kARINUS5th May 1989
134.123.0.0/1665.5kARINUS31st May 1989