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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.

Unannounced blocks in Canada

3,775 blocks match, ordered by prefix.

Allocated but unannounced blocks, 3101 to 3150 of 3775
PrefixAddressesRegistryCountryAllocated
216.171.238.0/23512ARINCA10th Jun 2002
216.183.0.0/198.2kARINCA22nd Dec 2000
216.20.208.0/204.1kARINCA11th Jan 2019
216.211.199.0/24256ARINCA14th Apr 2023
216.221.32.0/198.2kARINCA7th May 1999
216.238.36.0/221kARINCA2nd Jul 2025
216.240.0.0/204.1kARINCA16th Sept 1999
216.241.224.0/204.1kARINCA17th Nov 1999
216.246.224.0/198.2kARINCA31st Oct 2005
216.25.16.0/221kARINCA28th Jul 1998
216.252.212.0/221kARINCA4th May 2015
216.38.236.0/221kARINCA1st Apr 2024
216.52.222.0/24256ARINCA16th Jul 2026
216.7.192.0/198.2kARINCA7th Feb 2001
216.87.222.0/24256ARINCA13th Aug 1999
216.99.96.0/204.1kARINCA28th Oct 1998
23.128.82.0/24256ARINCA10th Nov 2021
23.132.248.0/24256ARINCA3rd Mar 2022
23.133.168.0/24256ARINCA17th Mar 2022
23.134.48.0/24256ARINCA14th May 2019
23.139.144.0/24256ARINCA30th Jul 2019
23.139.152.0/24256ARINCA3rd Aug 2022
23.139.16.0/24256ARINCA24th Jul 2019
23.139.208.0/24256ARINCA5th Aug 2019
23.140.52.0/24256ARINCA13th Jun 2025
23.143.112.0/24256ARINCA15th Oct 2019
23.143.60.0/24256ARINCA1st Aug 2025
23.144.240.0/24256ARINCA25th Oct 2019
23.144.44.0/24256ARINCA20th Aug 2025
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
23.146.28.0/24256ARINCA24th Sept 2025
23.147.80.0/24256ARINCA13th Dec 2019
23.148.192.0/24256ARINCA27th Oct 2017
23.148.193.0/24256ARINCA2nd Jan 2019
23.148.194.0/24256ARINCA18th Mar 2020
23.148.195.0/24256ARINCA25th Sept 2020
23.149.152.0/24256ARINCA15th Mar 2023
23.149.40.0/24256ARINCA8th Mar 2023
23.150.124.0/24256ARINCA25th Nov 2025
23.151.140.0/24256ARINCA19th Dec 2025
23.155.56.0/24256ARINCA9th Jun 2023
23.156.160.0/24256ARINCA22nd Oct 2018
23.156.232.0/24256ARINCA28th Jun 2023
23.158.4.0/24256ARINCA11th May 2026
23.159.52.0/24256ARINCA29th May 2026
23.159.96.0/24256ARINCA20th Nov 2018
23.160.196.0/24256ARINCA29th Jun 2026