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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 19001 to 19050 of 26295
PrefixAddressesRegistryCountryAllocated
208.81.208.0/24256ARINUS6th Aug 2018
208.81.210.0/23512ARINUS27th Aug 2007
208.81.232.0/24256ARINUS30th Aug 2007
208.81.233.0/24256ARINUS30th Aug 2007
208.81.234.0/23512ARINUS30th Aug 2007
208.81.240.0/212kARINUS7th Jun 2019
208.82.172.0/221kARINUS9th Nov 2020
208.82.176.0/221kARINUS21st Sept 2007
208.82.32.0/221kARINUS10th Sept 2007
208.82.4.0/221kARINUS6th Sept 2007
208.82.80.0/221kARINUS13th Sept 2007
208.83.110.0/24256ARINUS29th Apr 2025
208.83.32.0/221kARINUS23rd Apr 2026
208.83.52.0/221kARINUS1st Jul 2025
208.84.140.0/221kARINUS15th Nov 2007
208.84.176.0/221kARINUS20th Nov 2007
208.84.220.0/221kARINUS28th Nov 2007
208.84.240.0/212kARINUS30th Nov 2007
208.84.28.0/221kARINUS30th Oct 2007
208.85.108.0/221kARINUS13th Dec 2007
208.85.144.0/212kARINUS19th Dec 2007
208.85.152.0/221kARINUS19th Dec 2007
208.85.56.0/221kARINUS3rd Dec 2007
208.86.128.0/212kARINUS22nd Jan 2008
208.86.184.0/212kARINUS28th Jan 2008
208.86.72.0/212kARINUS14th Jan 2008
208.87.172.0/221kARINUS26th Feb 2008
208.87.184.0/212kARINUS26th Feb 2008
208.87.208.0/212kARINUS27th Feb 2008
208.87.8.0/221kARINUS11th Feb 2008
208.88.144.0/221kARINUS18th Mar 2008
208.88.204.0/221kARINUS26th Mar 2008
208.88.40.0/221kARINUS10th Mar 2008
208.88.64.0/24256ARINUS28th Jan 2026
208.88.80.0/221kARINUS12th Mar 2008
208.89.11.0/24256ARINUS3rd Apr 2008
208.89.136.0/221kARINUS22nd Apr 2008
208.89.184.0/221kARINUS24th Apr 2008
208.89.188.0/221kARINUS24th Apr 2008
208.89.192.0/212kARINUS25th Apr 2008
208.89.4.0/221kARINUS3rd Apr 2008
208.89.56.0/221kARINUS10th Apr 2008
208.89.68.0/23512ARINUS11th Apr 2008
208.89.71.0/24256ARINUS11th Apr 2008
208.89.80.0/221kARINUS14th Apr 2008
208.89.88.0/221kARINUS14th Apr 2008
208.89.9.0/24256ARINUS3rd Apr 2008
208.90.208.0/221kARINUS16th May 2008
208.90.248.0/212kARINUS22nd May 2008
208.90.44.0/221kARINUS1st May 2008