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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with the most unannounced blocks, largest first.

Unannounced blocks in United States

26,951 blocks match, ordered by prefix.

Allocated but unannounced blocks, 18901 to 18950 of 26951
PrefixAddressesRegistryCountryAllocated
206.55.224.0/198.2kARINUS9th Jul 2019
206.55.96.0/221kARINUS24th Jul 1995
206.56.0.0/1732.8kARINUS22nd Jun 1995
206.60.0.0/1665.5kARINUS5th Jul 1995
206.71.0.0/212kARINUS25th Jul 1995
206.71.10.0/24256ARINUS8th Feb 2017
206.71.12.0/24256ARINUS24th Mar 2017
206.71.128.0/212kARINUS28th Jul 1995
206.71.13.0/24256ARINUS20th Jun 2017
206.71.136.0/24256ARINUS10th Aug 2017
206.71.138.0/24256ARINUS12th Sept 2017
206.71.139.0/24256ARINUS14th Sept 2017
206.71.14.0/24256ARINUS20th Jun 2017
206.71.140.0/24256ARINUS23rd Oct 2017
206.71.141.0/24256ARINUS7th Nov 2017
206.71.142.0/24256ARINUS27th Nov 2017
206.71.143.0/24256ARINUS27th Nov 2017
206.71.8.0/24256ARINUS3rd Feb 2017
206.71.9.0/24256ARINUS3rd Feb 2017
206.72.128.0/198.2kARINUS4th Aug 1995
206.72.216.0/221kARINUS1st Jul 2025
206.80.144.0/204.1kARINUS28th Nov 2016
206.80.224.0/212kARINUS11th Aug 1995
206.80.232.0/24256ARINUS27th Nov 2017
206.80.234.0/24256ARINUS7th Feb 2018
206.80.236.0/24256ARINUS5th Jul 2023
206.80.238.0/24256ARINUS9th Jul 2018
206.81.109.0/24256ARINUS20th Nov 2018
206.81.64.0/212kARINUS20th Apr 2005
206.81.72.0/221kARINUS20th Apr 2005
206.81.80.0/221kARINUS12th Feb 2009
206.82.104.0/221kARINUS10th Oct 2018
206.82.109.0/24256ARINUS29th Jan 2019
206.82.160.0/221kARINUS7th Sept 1995
206.82.168.0/212kARINUS25th Nov 2008
206.83.10.0/24256ARINUS25th Mar 2019
206.83.12.0/24256ARINUS8th May 2019
206.83.136.0/24256ARINUS6th Jan 2020
206.83.138.0/24256ARINUS28th Jan 2020
206.83.139.0/24256ARINUS28th Oct 2025
206.83.14.0/24256ARINUS30th May 2019
206.83.140.0/24256ARINUS2nd Apr 2020
206.83.141.0/24256ARINUS1st May 2020
206.83.142.0/24256ARINUS7th May 2020
206.83.143.0/24256ARINUS5th May 2020
206.83.192.0/198.2kARINUS10th May 2004
206.83.224.0/221kARINUS14th Sept 1995
206.83.32.0/212kARINUS13th Sept 1995
206.83.42.0/24256ARINUS25th Jul 2019
206.83.43.0/24256ARINUS8th Aug 2019