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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

85,346 blocks match, ordered by prefix.

Allocated but unannounced blocks, 52501 to 52550 of 85346
PrefixAddressesRegistryCountryAllocated
23.143.164.0/24256ARINUS7th Aug 2025
23.143.180.0/24256ARINUS7th Aug 2025
23.143.184.0/24256ARINUS18th Nov 2022
23.143.20.0/24256ARINUS31st Jul 2025
23.143.220.0/24256ARINUS12th Aug 2025
23.143.240.0/24256ARINUS16th Oct 2019
23.143.244.0/24256ARINUS18th Aug 2025
23.143.252.0/24256ARINUS18th Aug 2025
23.143.60.0/24256ARINCA1st Aug 2025
23.143.68.0/24256ARINUS1st Aug 2025
23.144.0.0/24256ARINUS12th Oct 2015
23.144.136.0/24256ARINUS9th Dec 2022
23.144.140.0/24256ARINUS25th Aug 2025
23.144.180.0/24256ARINUS28th Aug 2025
23.144.200.0/24256ARINUS19th Dec 2022
23.144.208.0/24256ARINUS25th Oct 2019
23.144.232.0/24256ARINUS21st Dec 2022
23.144.240.0/24256ARINCA25th Oct 2019
23.144.252.0/24256ARINUS4th Sept 2025
23.144.44.0/24256ARINCA20th Aug 2025
23.144.52.0/24256ARINUS20th Aug 2025
23.144.76.0/24256ARINUS20th Aug 2025
23.145.140.0/24256ARINUS15th Sept 2025
23.145.168.0/24256ARINUS5th Jan 2023
23.145.56.0/24256ARINUS29th Dec 2022
23.145.57.0/24256ARINUS6th Nov 2023
23.145.84.0/24256ARINUS20th Feb 2026
23.145.88.0/24256ARINUS29th Dec 2022
23.146.108.0/24256ARINUS1st Oct 2025
23.146.112.0/24256ARINUS20th Nov 2019
23.146.12.0/24256ARINUS24th Sept 2025
23.146.148.0/24256ARINUS1st Oct 2025
23.146.17.0/24256ARINUS20th Apr 2020
23.146.18.0/24256ARINUS20th Apr 2020
23.146.184.0/24256ARINUS25th Jan 2023
23.146.192.0/24256ARINCA23rd Oct 2017
23.146.193.0/24256ARINCA21st Feb 2019
23.146.194.0/24256ARINCA23rd Apr 2020
23.146.195.0/24256ARINCA29th Oct 2020
23.146.20.0/24256ARINUS24th Sept 2025
23.146.208.0/24256ARINUS12th Dec 2019
23.146.217.0/24256ARINUS11th Dec 2024
23.146.252.0/24256ARINUS7th Oct 2025
23.146.28.0/24256ARINCA24th Sept 2025
23.146.52.0/24256ARINUS26th Sept 2025
23.146.60.0/24256ARINUS29th Sept 2025
23.146.92.0/24256ARINUS30th Sept 2025
23.147.124.0/24256ARINUS15th Oct 2025
23.147.192.0/24256ARINUS23rd Oct 2017
23.147.20.0/24256ARINUS8th Oct 2025