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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,295 blocks match, ordered by prefix.

Allocated but unannounced blocks, 18951 to 19000 of 26295
PrefixAddressesRegistryCountryAllocated
208.72.8.0/221kARINUS11th Jul 2024
208.72.88.0/212kARINUS10th Nov 2006
208.73.32.0/212kARINUS4th Dec 2006
208.73.64.0/212kARINUS5th Dec 2006
208.74.112.0/221kARINUS26th Jan 2007
208.74.12.0/24256ARINUS5th Jul 2017
208.74.13.0/24256ARINUS1st Jul 2022
208.74.144.0/221kARINUS1st Feb 2007
208.74.204.0/221kARINUS9th Feb 2007
208.75.124.0/221kARINUS23rd Feb 2007
208.75.168.0/221kARINUS28th Feb 2007
208.75.196.0/221kARINUS5th Mar 2007
208.75.216.0/221kARINUS7th Mar 2007
208.75.232.0/212kARINUS8th Mar 2007
208.75.4.0/221kARINUS15th Feb 2007
208.75.52.0/221kARINUS16th Feb 2007
208.75.56.0/221kARINUS16th Feb 2007
208.75.92.0/221kARINUS21st Feb 2007
208.76.128.0/212kARINUS27th Mar 2007
208.76.144.0/212kARINUS27th Mar 2007
208.76.204.0/221kARINUS2nd Apr 2007
208.76.48.0/221kARINUS2nd Jul 2010
208.76.52.0/221kARINUS2nd Jul 2010
208.76.76.0/221kARINUS21st Mar 2007
208.77.104.0/212kARINUS23rd Apr 2007
208.77.12.0/221kARINUS10th Apr 2007
208.77.152.0/221kARINUS25th Apr 2007
208.77.164.0/221kARINUS3rd Oct 2025
208.77.192.0/221kARINUS1st May 2007
208.77.36.0/221kARINUS13th Apr 2007
208.77.88.0/221kARINUS20th Apr 2007
208.78.0.0/221kARINUS7th May 2007
208.78.68.0/221kARINUS16th May 2007
208.78.72.0/221kARINUS16th May 2007
208.78.82.0/24256ARINUS1st Oct 2018
208.78.84.0/23512ARINUS31st Jul 2017
208.78.86.0/24256ARINUS19th Jun 2018
208.79.116.0/221kARINUS18th Jun 2007
208.79.138.0/24256ARINUS3rd Jun 2021
208.79.188.0/221kARINUS26th Jun 2007
208.79.200.0/212kARINUS28th Jun 2007
208.79.220.0/221kARINUS29th Jun 2007
208.79.224.0/221kARINUS5th Apr 2011
208.80.108.0/221kARINUS18th Jul 2007
208.80.112.0/221kARINUS6th Apr 2026
208.80.48.0/221kARINUS10th Jul 2007
208.80.56.0/221kARINUS10th Jul 2007
208.80.92.0/221kARINUS27th Mar 2020
208.81.124.0/221kARINUS17th Aug 2007
208.81.184.0/23512ARINUS22nd Aug 2007