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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,277 blocks match, ordered by prefix.

Allocated but unannounced blocks, 25051 to 25100 of 26277
PrefixAddressesRegistryCountryAllocated
2620:f6:8000::/4865.5k × /64ARINUS6th Jun 2012
2620:f7:4000::/4865.5k × /64ARINUS4th Feb 2016
2620:f7:8000::/4865.5k × /64ARINUS8th Jun 2012
2620:f7::/4865.5k × /64ARINUS28th Mar 2011
2620:f7:c000::/4865.5k × /64ARINUS4th Feb 2016
2620:f8:8000::/4865.5k × /64ARINUS11th Jun 2012
2620:f8::/4865.5k × /64ARINUS6th Apr 2010
2620:f8:c000::/4865.5k × /64ARINUS6th Aug 2026
2620:f9:4000::/4865.5k × /64ARINUS10th Feb 2016
2620:f9:8000::/4865.5k × /64ARINUS11th Jun 2012
2620:f9::/441M × /64ARINUS29th Mar 2011
2620:f9:c000::/4865.5k × /64ARINUS10th Feb 2016
2620:f:2000::/4865.5k × /64ARINUS5th Dec 2016
2620:f:a000::/4865.5k × /64ARINUS19th Dec 2016
2620:f:c000::/4865.5k × /64ARINUS30th Nov 2012
2620:f:e000::/4865.5k × /64ARINUS21st Dec 2016
2620:fa:4000::/4865.5k × /64ARINUS23rd Dec 2025
2620:fa::/4865.5k × /64ARINUS12th Nov 2010
2620:fa:c000::/4865.5k × /64ARINUS17th Feb 2016
2620:fb:4000::/4865.5k × /64ARINUS23rd Feb 2016
2620:fb:8000::/4865.5k × /64ARINUS15th Jun 2012
2620:fb::/4865.5k × /64ARINUS29th Mar 2011
2620:fb:c000::/4865.5k × /64ARINUS21st Aug 2026
2620:fc:8000::/4865.5k × /64ARINUS15th Jun 2012
2620:fd:4000::/4865.5k × /64ARINUS3rd Mar 2016
2620:fe:8000::/4865.5k × /64ARINUS22nd Jun 2012
2620:ff:8000::/4865.5k × /64ARINUS1st Nov 2013
2620:ff::/4865.5k × /64ARINUS30th Mar 2011
2630::/16281T × /64ARINUS20th Oct 2023
2631:2000::/241.1T × /64ARINUS2nd Jan 2025
2631:3000::/241.1T × /64ARINUS10th Apr 2025
2631:8000::/241.1T × /64ARINUS12th Nov 2025
2631:a000::/241.1T × /64ARINUS11th May 2026
31.220.216.0/212kARINUS4th Dec 2024
31.220.245.0/24256ARINUS4th Dec 2024
31.99.128.0/204.1kARINUS18th May 2026
31.99.152.0/24256ARINUS18th May 2026
32.144.0.0/121MARINUS25th Sept 2023
32.240.0.0/15131kARINUS23rd Jun 2023
34.3.2.0/24256ARINUS9th May 2022
35.128.216.0/212kARINUS1st Apr 1994
35.128.224.0/198.2kARINUS1st Apr 1994
35.18.0.0/15131kARINUS8th Feb 2024
35.26.0.0/15131kARINUS8th Feb 2024
35.28.0.0/14262kARINUS8th Feb 2024
35.34.64.0/204.1kARINUS1st Apr 1994
35.48.0.0/15131kARINUS8th Feb 2024
35.52.0.0/15131kARINUS8th Feb 2024
35.56.0.0/15131kARINUS8th Feb 2024
35.60.0.0/15131kARINUS8th Feb 2024