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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

27,034 blocks match, ordered by prefix.

Allocated but unannounced blocks, 16151 to 16200 of 27034
PrefixAddressesRegistryCountryAllocated
204.153.204.0/23512ARINUS17th Jan 1995
204.153.208.0/221kARINUS17th Jan 1995
204.153.216.0/23512ARINUS20th Jan 1995
204.153.218.0/24256ARINUS20th Jan 1995
204.153.220.0/221kARINUS1st Oct 2021
204.153.232.0/221kARINUS10th Feb 1995
204.153.236.0/221kARINUS10th Feb 1995
204.153.248.0/212kARINUS15th Feb 1995
204.153.28.0/221kARINUS5th Oct 1994
204.153.32.0/23512ARINUS10th Oct 1994
204.153.34.0/24256ARINUS10th Oct 1994
204.153.36.0/23512ARINUS17th Oct 1994
204.153.38.0/24256ARINUS17th Oct 1994
204.153.39.0/24256ARINUS2nd Jan 2024
204.153.4.0/23512ARINUS17th Sept 1994
204.153.44.0/221kARINUS19th Oct 1994
204.153.6.0/24256ARINUS17th Sept 1994
204.153.64.0/23512ARINUS28th Oct 1994
204.153.66.0/24256ARINUS28th Oct 1994
204.153.68.0/221kARINUS31st Oct 1994
204.153.72.0/23512ARINUS31st Oct 1994
204.153.84.0/221kARINUS3rd Nov 1994
204.153.88.0/221kARINUS3rd Nov 1994
204.153.92.0/221kARINUS8th Nov 1994
204.154.0.0/212kARINUS21st Sept 1994
204.154.100.0/23512ARINUS17th Oct 1994
204.154.102.0/23512ARINUS1st Nov 2010
204.154.120.0/24256ARINUS19th Oct 1994
204.154.141.0/24256ARINUS21st Dec 2010
204.154.144.0/221kARINUS25th Oct 1994
204.154.148.0/23512ARINUS25th Oct 1994
204.154.150.0/24256ARINUS25th Oct 1994
204.154.160.0/212kARINUS26th Oct 1994
204.154.208.0/212kARINUS15th Nov 1994
204.154.230.0/23512ARINUS3rd Dec 2010
204.154.232.0/212kARINUS18th Nov 1994
204.154.32.0/212kARINUS28th Sept 1994
204.154.72.0/212kARINUS11th Oct 1994
204.154.88.0/221kARINUS17th Oct 1994
204.154.92.0/23512ARINUS17th Oct 1994
204.154.96.0/221kARINUS17th Oct 1994
204.155.80.0/212kARINUS5th Oct 1994
204.155.88.0/221kARINUS5th Oct 1994
204.155.92.0/23512ARINUS5th Oct 1994
204.155.94.0/24256ARINUS5th Oct 1994
204.156.178.0/24256ARINUS10th Dec 2014
204.156.32.0/198.2kARINUS28th Sept 1994
204.16.104.0/221kARINUS27th Oct 2005
204.16.116.0/221kARINUS22nd Aug 2012
204.16.152.0/212kARINUS3rd Nov 2005