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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Browse by country

Countries with the most unannounced blocks, largest first.

Unannounced blocks in United States

27,034 blocks match, ordered by prefix.

Allocated but unannounced blocks, 15351 to 15400 of 27034
PrefixAddressesRegistryCountryAllocated
2001:506:9::/4865.5k × /64ARINUS14th Oct 2020
2001:506::/4865.5k × /64ARINUS17th Jan 2007
2001:530::/324.3B × /64ARINUS31st Oct 2002
2001:570::/324.3B × /64ARINUS5th Feb 2003
2001:5d0::/324.3B × /64ARINUS26th Mar 2003
2001:5d8::/324.3B × /64ARINUS4th Apr 2003
2001:5f0::/324.3B × /64ARINUS28th Apr 2003
2001:678:106c::/4865.5k × /64RIPE NCCUS10th Apr 2025
2001:678:218::/4865.5k × /64RIPE NCCUS1st Sept 2025
2001:678:34c::/4865.5k × /64RIPE NCCUS22nd Dec 2016
2001:678:c04::/4865.5k × /64RIPE NCCUS10th Jun 2025
2001:67c:114c::/4865.5k × /64RIPE NCCUS15th Feb 2023
2001:67c:25f8::/4865.5k × /64RIPE NCCUS12th Dec 2011
2001:67c:29bc::/4865.5k × /64RIPE NCCUS4th Mar 2020
2001:67c:a0c::/4865.5k × /64RIPE NCCUS13th Jun 2022
2001:67c:c88::/4865.5k × /64RIPE NCCUS11th Feb 2026
2001:67c:cc0::/4865.5k × /64RIPE NCCUS21st Jul 2023
2001:67c:cc4::/4865.5k × /64RIPE NCCUS21st Jul 2023
2001:67c:d58::/4865.5k × /64RIPE NCCUS29th Nov 2023
2001:67c:d80::/4865.5k × /64RIPE NCCUS10th Jan 2024
2001:7f8:fd::/4865.5k × /64RIPE NCCUS6th Jul 2020
2001:df0:27e::/47131k × /64APNICUS27th Jan 2012
2001:df0:290::/4865.5k × /64APNICUS27th Jan 2012
2001:df0:2e40::/4865.5k × /64APNICUS13th Dec 2021
2001:df0:6f40::/4865.5k × /64APNICUS11th Feb 2022
2001:df0:7840::/4865.5k × /64APNICUS22nd Feb 2022
2001:df1:7f44::/46262k × /64APNICUS28th Jan 2026
2001:df1:7f48::/45524k × /64APNICUS28th Jan 2026
2001:df1:7f50::/441M × /64APNICUS28th Jan 2026
2001:df1:7f60::/432.1M × /64APNICUS28th Jan 2026
2001:df1:81c0::/4865.5k × /64APNICUS9th Nov 2022
2001:df1:ec0::/4865.5k × /64APNICUS27th Jul 2022
2001:df2:a300::/4865.5k × /64APNICUS27th Sept 2017
2001:df2:fc80::/4865.5k × /64APNICUS26th Feb 2020
2001:df3:45c0::/4865.5k × /64APNICUS12th Dec 2023
2001:df3:46c0::/4865.5k × /64APNICUS12th Dec 2023
2001:df3:4b00::/4865.5k × /64APNICUS28th Nov 2017
2001:df3:b580::/4865.5k × /64APNICUS12th May 2020
2001:df3:da00::/4865.5k × /64APNICUS5th Aug 2016
2001:df4:5b40::/4865.5k × /64APNICUS3rd Oct 2024
2001:df4:dc40::/4865.5k × /64APNICUS2nd Jan 2025
2001:df5:4100::/4865.5k × /64APNICUS28th May 2018
2001:df5:a980::/4865.5k × /64APNICUS24th Dec 2020
2001:df7:ac00::/4865.5k × /64APNICUS26th Nov 2015
201.11.224.0/204.1kRIPE NCCUS13th Mar 2025
201.19.0.0/1665.5kARINUS29th Jul 2026
201.29.0.0/1665.5kARINUS27th May 2026
201.32.128.0/198.2kARINUS13th Mar 2025
201.4.128.0/1732.8kARINUS29th Jul 2026
201.50.128.0/1732.8kARINUS29th Jul 2026