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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 20351 to 20400 of 27014
PrefixAddressesRegistryCountryAllocated
2404:f6c0::/324.3B × /64APNICUS16th Jun 2019
2405:22c0::/324.3B × /64APNICUS2nd Aug 2019
2405:b1c0::/324.3B × /64APNICUS7th Jan 2020
2405:ec40::/324.3B × /64APNICUS16th Mar 2020
2405:f9c0::/324.3B × /64APNICUS3rd Apr 2020
2406:3dc0::/324.3B × /64APNICUS9th Jul 2020
2406:9a80::/324.3B × /64APNICUS12th Aug 2016
2406:9f01::/324.3B × /64APNICUS7th Sept 2022
2406:b780::/324.3B × /64APNICUS17th Aug 2016
2406:e840::/324.3B × /64APNICUS15th Dec 2020
2407:40::/324.3B × /64APNICUS7th Jan 2021
2407:4100::/324.3B × /64APNICUS21st Jun 2013
2407:5880::/2934.4B × /64APNICUS23rd Sept 2016
2407:acc0::/324.3B × /64APNICUS21st Jul 2021
2407:ba40::/324.3B × /64APNICUS3rd Aug 2021
2600:1500::/2868.7B × /64ARINUS19th Oct 2012
2600:1c00::/2868.7B × /64ARINUS27th May 2026
2600:2200::/2868.7B × /64ARINUS30th Dec 2014
2600:2300::/2868.7B × /64ARINUS29th Jun 2015
2600:2400::/2934.4B × /64ARINUS7th Jun 2010
2600:2d00::/2868.7B × /64ARINUS25th Aug 2017
2600:3100::/2868.7B × /64ARINUS29th May 2018
2600:3200::/2868.7B × /64ARINUS19th Jun 2018
2600:3800::/2868.7B × /64ARINUS6th Jan 2011
2600:7800::/2868.7B × /64ARINUS25th Oct 2013
2600:7d00::/2868.7B × /64ARINUS27th Feb 2019
2600:8c00::/2868.7B × /64ARINUS10th Mar 2015
2600:a000::/2868.7B × /64ARINUS21st Aug 2015
2600:a400::/2868.7B × /64ARINUS14th Oct 2015
2600:b400::/324.3B × /64ARINUS2nd Apr 2018
2600:c14::/324.3B × /64ARINUS2nd Feb 2010
2600:c400::/2868.7B × /64ARINUS28th Aug 2020
2600:d000::/2868.7B × /64ARINUS30th Oct 2020
2601:1100::/2868.7B × /64ARINUS9th May 2022
2601:1500::/2868.7B × /64ARINUS15th Feb 2023
2601:1800::/2868.7B × /64ARINUS6th Oct 2023
2601:1a00::/241.1T × /64ARINUS1st Apr 2024
2601:1b00::/241.1T × /64ARINUS18th Apr 2024
2601:1e00::/241.1T × /64ARINUS13th Jun 2024
2601:3000::/2868.7B × /64ARINUS29th Aug 2024
2601:7000::/2868.7B × /64ARINUS3rd Jun 2025
2601:e000::/241.1T × /64ARINUS10th Apr 2023
2601:f000::/241.1T × /64ARINUS6th Jul 2023
2602:234::/36268M × /64ARINUS20th Sept 2023
2602:270::/36268M × /64ARINUS20th Dec 2021
2602:272::/36268M × /64ARINUS25th Jan 2022
2602:273::/36268M × /64ARINUS9th Feb 2022
2602:275::/36268M × /64ARINUS6th May 2022
2602:276::/324.3B × /64ARINUS26th May 2022
2602:27b::/324.3B × /64ARINUS27th Oct 2022