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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with unannounced space registered through ARIN, largest first.

Unannounced blocks registered through ARIN

30,463 blocks match, ordered by prefix.

Allocated but unannounced blocks, 21851 to 21900 of 30463
PrefixAddressesRegistryCountryAllocated
206.51.5.0/24256ARINCA20th Dec 1995
206.51.6.0/24256ARINCA18th Dec 1995
206.51.7.0/24256ARINUS6th Jul 2007
206.53.128.0/212kARINUS21st Jun 1995
206.53.137.0/24256ARINUS8th Jan 2015
206.53.138.0/24256ARINGB11th Feb 2015
206.53.139.0/24256ARINUS26th Feb 2015
206.53.140.0/24256ARINCA31st Mar 2015
206.53.143.0/24256ARINUS15th Apr 2015
206.53.16.0/204.1kARINUS4th Aug 2004
206.53.168.0/221kARINUS19th Oct 2015
206.53.172.0/23512ARINUS19th Oct 2015
206.53.174.0/24256ARINUS19th Oct 2015
206.53.175.0/24256ARINUS4th Nov 2015
206.53.200.0/24256ARINUS2nd Dec 2015
206.53.201.0/24256ARINUS22nd Feb 2016
206.53.202.0/24256ARINUS14th Mar 2016
206.53.203.0/24256ARINUS11th Apr 2016
206.53.204.0/24256ARINUS3rd Jun 2016
206.53.205.0/24256ARINUS22nd Aug 2016
206.53.206.0/24256ARINUS8th Sept 2016
206.53.207.0/24256ARINUS15th Nov 2016
206.53.32.0/212kARINUS20th Jun 1995
206.53.40.0/212kARINUS14th Nov 2008
206.54.224.0/198.2kARINUS24th Jul 1995
206.55.160.0/221kARINUS25th Jul 1995
206.55.164.0/221kARINUS2nd Jul 2025
206.55.168.0/221kARINUS17th Nov 2008
206.55.196.0/221kARINUS13th Nov 2013
206.55.200.0/212kARINUS18th Nov 2008
206.55.221.0/24256ARINUS17th Feb 2023
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
206.71.11.0/24256ARINCA1st Mar 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
206.71.137.0/24256ARINCA29th 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