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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

27,014 blocks match, ordered by prefix.

Allocated but unannounced blocks, 20251 to 20300 of 27014
PrefixAddressesRegistryCountryAllocated
23.185.224.0/24256ARINUS18th Feb 2026
23.185.232.0/24256ARINUS6th Aug 2024
23.186.0.0/24256ARINUS2nd Feb 2026
23.186.176.0/24256ARINUS23rd Aug 2021
23.187.112.0/24256ARINUS26th Aug 2021
23.187.128.0/24256ARINUS23rd Jun 2017
23.187.168.0/24256ARINUS27th Aug 2024
23.187.209.0/24256ARINUS8th Nov 2024
23.188.192.0/24256ARINUS16th Apr 2018
23.188.21.0/24256ARINUS24th Sept 2021
23.188.40.0/24256ARINUS3rd Sept 2024
23.188.48.0/24256ARINUS10th Sept 2021
23.189.0.0/24256ARINUS29th Nov 2016
23.189.232.0/24256ARINUS13th Sept 2024
23.189.24.0/24256ARINUS5th Sept 2024
23.189.80.0/24256ARINUS18th Oct 2021
23.189.81.0/24256ARINUS18th Oct 2021
23.190.192.0/24256ARINUS18th Apr 2018
23.190.24.0/24256ARINUS13th May 2026
23.190.49.0/24256ARINUS24th Sept 2021
23.190.50.0/24256ARINUS24th Sept 2021
23.190.51.0/24256ARINUS24th Sept 2021
23.190.64.0/24256ARINUS17th Apr 2018
23.190.80.0/212kARINUS30th Sept 2021
23.191.208.0/24256ARINUS14th Oct 2021
23.191.24.0/24256ARINUS4th Oct 2024
23.191.56.0/24256ARINUS7th Oct 2024
23.226.144.0/204.1kARINUS20th Sept 2013
23.227.0.0/198.2kARINUS16th Sept 2013
23.228.0.0/1816.4kARINUS9th Sept 2013
23.236.32.0/204.1kARINUS18th Oct 2013
23.246.132.0/221kARINUS1st Jul 2026
23.246.152.0/221kARINUS6th Jul 2026
23.246.160.0/23512ARINUS6th Jul 2026
23.246.162.0/23512ARINUS7th Jul 2026
23.246.172.0/221kARINUS1st Jul 2026
23.246.176.0/221kARINUS1st Jul 2026
23.246.192.0/1816.4kARINUS14th Nov 2013
23.247.140.0/221kARINUS7th Oct 2021
23.247.184.0/23512ARINUS20th Oct 2021
23.247.186.0/24256ARINUS8th Oct 2021
23.247.190.0/24256ARINUS5th Oct 2021
23.247.224.0/221kARINUS8th Oct 2021
23.247.244.0/221kARINUS8th Oct 2021
23.247.254.0/23512ARINUS10th Nov 2021
23.249.144.0/204.1kARINUS28th Sept 2018
23.249.166.0/24256ARINUS10th Mar 2020
23.29.160.0/198.2kARINUS26th Mar 2012
23.88.224.0/198.2kARINUS14th Apr 2021
23.92.96.0/204.1kARINUS20th Aug 2013