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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,989 blocks match, ordered by prefix.

Allocated but unannounced blocks, 26351 to 26400 of 26989
PrefixAddressesRegistryCountryAllocated
66.235.196.0/221kARINUS7th Jul 2003
66.235.202.0/23512ARINUS7th Jul 2003
66.235.204.0/23512ARINUS7th Jul 2003
66.235.206.0/24256ARINUS7th Jul 2003
66.235.208.0/24256ARINUS7th Jul 2003
66.235.210.0/23512ARINUS7th Jul 2003
66.235.212.0/23512ARINUS7th Jul 2003
66.235.216.0/212kARINUS7th Jul 2003
66.242.58.0/23512ARINUS19th Feb 2026
66.245.180.0/221kARINUS2nd Mar 2004
66.248.236.0/24256ARINUS26th Dec 2019
66.248.239.0/24256ARINUS19th Dec 2019
66.248.244.0/24256ARINUS18th Dec 2019
66.248.245.0/24256ARINUS26th Dec 2019
66.249.125.0/24256ARINUS2nd Apr 2008
66.249.172.0/221kARINUS13th Feb 2012
66.252.240.0/204.1kARINUS27th Mar 2006
66.255.192.0/212kARINUS9th Feb 2004
66.33.33.0/24256ARINUS14th Dec 2022
66.33.64.0/24256ARINUS29th Nov 2022
66.33.76.0/24256ARINUS2nd May 2024
66.33.95.0/24256ARINUS24th Jun 2024
66.36.64.0/198.2kARINUS15th Aug 2002
66.37.0.0/198.2kARINUS20th Oct 2000
66.37.112.0/204.1kARINUS17th Feb 2004
66.40.108.0/221kARINUS25th Mar 2025
66.45.0.0/212kARINUS19th Jul 2023
66.45.14.0/24256ARINUS25th Oct 2023
66.45.40.0/212kARINUS19th Jul 2023
66.45.48.0/212kARINUS19th Jul 2023
66.45.95.0/24256ARINUS13th May 2024
66.51.196.0/23512ARINUS5th Jan 2024
66.51.198.0/23512ARINUS27th May 2020
66.51.200.0/212kARINUS27th May 2020
66.51.48.0/204.1kARINUS10th Feb 2004
66.55.96.0/204.1kARINUS15th Oct 2014
66.56.64.0/204.1kARINUS21st Mar 2025
66.59.195.0/24256ARINUS6th Jan 2022
66.59.212.0/221kARINUS1st Apr 2024
66.6.48.0/221kARINUS27th Dec 2023
66.6.80.0/204.1kARINUS22nd Nov 2000
66.63.128.0/198.2kARINUS16th May 2002
66.71.198.0/24256ARINUS9th Jan 2026
66.71.199.0/24256ARINUS21st Nov 2025
66.71.201.0/24256ARINUS4th Dec 2025
66.79.192.0/198.2kARINUS28th Oct 2003
66.81.0.0/23512ARINUS28th Feb 2001
66.81.103.0/24256ARINUS13th Feb 2012
66.81.104.0/23512ARINUS13th Feb 2012
66.81.120.0/221kARINUS13th Feb 2012