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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,993 blocks match, ordered by prefix.

Allocated but unannounced blocks, 2901 to 2950 of 26993
PrefixAddressesRegistryCountryAllocated
172.111.55.0/24256ARINUS19th Jul 2021
172.255.212.0/221kARINUS13th Mar 2013
172.255.216.0/212kARINUS13th Mar 2013
172.72.0.0/14262kARINUS6th Apr 2015
172.81.40.0/221kARINUS1st Apr 2021
172.82.105.0/24256ARINUS8th Apr 2021
172.82.107.0/24256ARINUS1st Jul 2025
172.82.16.0/221kARINUS7th Apr 2021
172.82.21.0/24256ARINUS8th Apr 2021
172.82.34.0/24256ARINUS6th Apr 2021
172.82.56.0/221kARINUS6th Apr 2021
172.82.69.0/24256ARINUS2nd Jun 2021
172.82.92.0/221kARINUS8th Apr 2021
172.83.1.0/24256ARINUS13th Jan 2018
172.83.124.0/24256ARINUS12th Feb 2018
172.83.125.0/24256ARINUS29th Jan 2018
172.83.146.0/24256ARINUS19th Jan 2018
172.83.200.0/24256ARINUS18th Jan 2018
172.83.203.0/24256ARINUS5th Feb 2018
172.83.207.0/24256ARINUS7th Apr 2020
172.83.250.0/24256ARINUS3rd Apr 2025
172.83.51.0/24256ARINUS17th Jan 2018
172.84.129.0/24256ARINUS6th Mar 2018
172.84.146.0/23512ARINUS13th Feb 2018
172.84.154.0/24256ARINUS14th Mar 2018
172.84.156.0/24256ARINUS22nd Feb 2018
172.84.159.0/24256ARINUS17th Jan 2018
172.85.64.0/212kARINUS20th May 2015
172.85.88.0/212kARINUS21st May 2015
172.86.160.0/204.1kARINUS1st Jun 2015
172.87.231.0/24256ARINUS1st Jul 2025
172.87.240.0/204.1kARINUS29th Nov 2017
172.96.130.0/23512ARINUS1st May 2018
172.96.36.0/23512ARINUS14th Mar 2025
172.97.112.0/221kARINUS15th Jul 2015
172.98.25.0/24256ARINUS15th Jul 2021
172.98.28.0/24256ARINUS11th Oct 2023
172.98.40.0/221kARINUS7th Jul 2021
172.98.5.0/24256ARINUS13th Jan 2026
172.98.6.0/24256ARINUS7th Jul 2021
172.98.7.0/24256ARINUS12th Jul 2021
172.99.140.0/221kARINUS11th Jan 2021
172.99.162.0/23512ARINUS11th Jan 2021
172.99.234.0/23512ARINUS15th Feb 2021
172.99.244.0/23512ARINUS6th Jan 2021
172.99.248.0/24256ARINUS13th Jan 2021
173.195.107.0/24256ARINUS30th Aug 2019
173.195.112.0/204.1kARINUS15th Sept 2010
173.195.32.0/204.1kARINUS25th Jul 2024
173.205.206.0/23512ARINUS22nd Jan 2020