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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 18551 to 18600 of 26295
PrefixAddressesRegistryCountryAllocated
206.223.37.0/24256ARINUS18th Oct 1995
206.223.38.0/24256ARINUS18th Oct 1995
206.223.39.0/24256ARINUS18th Oct 1995
206.223.4.0/24256ARINUS6th Oct 1995
206.223.40.0/24256ARINUS18th Oct 1995
206.223.41.0/24256ARINUS19th Oct 1995
206.223.42.0/24256ARINUS19th Oct 1995
206.223.43.0/24256ARINUS19th Oct 1995
206.223.44.0/24256ARINUS23rd Oct 1995
206.223.45.0/24256ARINUS23rd Oct 1995
206.223.46.0/24256ARINUS24th Oct 1995
206.223.47.0/24256ARINUS25th Oct 1995
206.223.49.0/24256ARINUS6th Nov 1995
206.223.5.0/24256ARINUS6th Oct 1995
206.223.52.0/24256ARINUS6th Nov 1995
206.223.53.0/24256ARINUS6th Nov 1995
206.223.54.0/24256ARINUS7th Nov 1995
206.223.55.0/24256ARINUS7th Nov 1995
206.223.56.0/24256ARINUS9th Nov 1995
206.223.57.0/24256ARINUS10th Nov 1995
206.223.58.0/24256ARINUS10th Nov 1995
206.223.59.0/24256ARINUS10th Nov 1995
206.223.60.0/24256ARINUS25th Jul 2022
206.223.61.0/24256ARINUS13th Nov 1995
206.223.62.0/24256ARINUS13th Nov 1995
206.223.63.0/24256ARINUS17th Nov 1995
206.223.65.0/24256ARINUS17th Nov 1995
206.223.66.0/24256ARINUS17th Nov 1995
206.223.68.0/24256ARINUS21st Nov 1995
206.223.69.0/24256ARINUS22nd Nov 1995
206.223.7.0/24256ARINUS6th Oct 1995
206.223.70.0/24256ARINUS27th Nov 1995
206.223.71.0/24256ARINUS27th Nov 1995
206.223.72.0/24256ARINUS27th Nov 1995
206.223.74.0/24256ARINUS28th Nov 1995
206.223.75.0/24256ARINUS1st Dec 1995
206.223.76.0/24256ARINUS4th Dec 1995
206.223.77.0/24256ARINUS4th Dec 1995
206.223.79.0/24256ARINUS6th Dec 1995
206.223.80.0/24256ARINUS8th Dec 1995
206.223.81.0/24256ARINUS11th Dec 1995
206.223.82.0/24256ARINUS11th Dec 1995
206.223.83.0/24256ARINUS20th Dec 1995
206.223.85.0/24256ARINUS16th Jan 1996
206.223.86.0/24256ARINUS24th Jan 1996
206.223.87.0/24256ARINUS28th Mar 1996
206.223.9.0/24256ARINUS9th Oct 1995
206.223.92.0/24256ARINUS9th Apr 1996
206.223.93.0/24256ARINUS18th Apr 1996
206.223.96.0/24256ARINUS10th May 1996