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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 19801 to 19850 of 27014
PrefixAddressesRegistryCountryAllocated
216.99.199.0/24256ARINUS19th Nov 2015
216.99.205.0/24256ARINUS14th Dec 2015
216.99.208.0/23512ARINUS7th Mar 2016
217.159.0.0/1732.8kARINUS14th Nov 2022
220.158.32.0/204.1kARINUS26th Jun 2024
23.111.8.0/221kARINUS24th Jul 2013
23.128.172.0/24256ARINUS6th Nov 2024
23.128.192.0/24256ARINUS14th Jul 2017
23.128.196.0/24256ARINUS7th Nov 2024
23.128.52.0/24256ARINUS22nd Oct 2024
23.128.84.0/24256ARINUS28th Oct 2024
23.128.88.0/24256ARINUS10th Nov 2021
23.128.98.0/24256ARINUS23rd Nov 2022
23.129.128.0/24256ARINUS21st Dec 2016
23.129.132.0/24256ARINUS18th Nov 2024
23.129.48.0/24256ARINUS21st Mar 2019
23.129.49.0/24256ARINUS25th Jun 2021
23.129.82.0/24256ARINUS9th Dec 2021
23.130.100.0/24256ARINUS5th Dec 2024
23.130.106.0/24256ARINUS14th Jan 2022
23.130.107.0/24256ARINUS14th Jan 2022
23.130.132.0/24256ARINUS6th Dec 2024
23.130.244.0/24256ARINUS16th Dec 2024
23.131.0.0/24256ARINUS17th May 2016
23.131.140.0/24256ARINUS31st Dec 2024
23.131.240.0/24256ARINUS19th Apr 2019
23.131.48.0/24256ARINUS8th Apr 2019
23.131.80.0/24256ARINUS10th Apr 2019
23.132.128.0/24256ARINUS9th Jan 2017
23.132.136.0/24256ARINUS25th Feb 2022
23.132.137.0/24256ARINUS25th Feb 2022
23.132.20.0/24256ARINUS8th Jan 2025
23.132.240.0/24256ARINUS1st May 2019
23.133.12.0/24256ARINUS23rd Jan 2025
23.133.128.0/24256ARINUS23rd Jan 2017
23.133.16.0/24256ARINUS1st May 2019
23.133.180.0/24256ARINUS3rd Feb 2025
23.133.36.0/24256ARINUS24th Jan 2025
23.133.44.0/24256ARINUS24th Jan 2025
23.133.6.0/24256ARINUS24th May 2016
23.133.92.0/24256ARINUS29th Jan 2025
23.133.96.0/24256ARINUS31st May 2018
23.134.100.0/24256ARINUS12th Feb 2025
23.134.116.0/24256ARINUS13th Feb 2025
23.134.132.0/24256ARINUS13th Feb 2025
23.134.204.0/24256ARINUS18th Feb 2025
23.134.40.0/24256ARINUS28th Mar 2022
23.134.56.0/24256ARINUS30th Mar 2022
23.134.80.0/24256ARINUS14th May 2019
23.135.172.0/24256ARINUS4th Mar 2025