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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,300 blocks match, ordered by prefix.

Allocated but unannounced blocks, 17101 to 17150 of 26300
PrefixAddressesRegistryCountryAllocated
204.86.196.0/221kARINUS2nd Jan 2009
204.86.208.0/212kARINUS16th Dec 1994
204.86.224.0/212kARINUS5th May 1995
204.86.232.0/212kARINUS27th Dec 1994
204.86.240.0/212kARINUS27th Dec 1994
204.86.248.0/24256ARINUS21st Feb 1995
204.86.249.0/24256ARINUS14th Oct 2011
204.86.8.0/221kARINUS7th Sept 1994
204.86.96.0/212kARINUS26th Oct 1994
204.87.0.0/204.1kARINUS17th Aug 1994
204.87.128.0/24256ARINUS9th Dec 1994
204.87.130.0/24256ARINUS9th Dec 1994
204.87.131.0/24256ARINUS14th Dec 1994
204.87.132.0/24256ARINUS16th Dec 1994
204.87.133.0/24256ARINUS16th Dec 1994
204.87.134.0/24256ARINUS16th Dec 1994
204.87.137.0/24256ARINUS27th Dec 1994
204.87.138.0/24256ARINUS27th Dec 1994
204.87.139.0/24256ARINUS27th Dec 1994
204.87.140.0/24256ARINUS27th Dec 1994
204.87.141.0/24256ARINUS27th Dec 1994
204.87.143.0/24256ARINUS27th Dec 1994
204.87.144.0/24256ARINUS28th Dec 1994
204.87.145.0/24256ARINUS28th Dec 1994
204.87.146.0/24256ARINUS28th Dec 1994
204.87.147.0/24256ARINUS28th Dec 1994
204.87.148.0/24256ARINUS28th Dec 1994
204.87.150.0/24256ARINUS29th Dec 1994
204.87.152.0/24256ARINUS29th Dec 1994
204.87.153.0/24256ARINUS29th Dec 1994
204.87.154.0/24256ARINUS29th Dec 1994
204.87.156.0/24256ARINUS29th Dec 1994
204.87.159.0/24256ARINUS29th Dec 1994
204.87.161.0/24256ARINUS29th Dec 1994
204.87.162.0/24256ARINUS29th Dec 1994
204.87.163.0/24256ARINUS29th Dec 1994
204.87.164.0/24256ARINUS29th Dec 1994
204.87.166.0/24256ARINUS3rd Jan 1995
204.87.168.0/24256ARINUS3rd Jan 1995
204.87.171.0/24256ARINUS5th Jan 1995
204.87.174.0/24256ARINUS7th Jan 1995
204.87.176.0/24256ARINUS7th Jan 1995
204.87.177.0/24256ARINUS9th Jan 1995
204.87.178.0/24256ARINUS24th Jan 1995
204.87.182.0/24256ARINUS24th Jan 1995
204.87.184.0/24256ARINUS24th Jan 1995
204.87.187.0/24256ARINUS26th Jan 1995
204.87.188.0/24256ARINUS26th Jan 1995
204.87.190.0/24256ARINUS26th Jan 1995
204.87.193.0/24256ARINUS26th Jan 1995