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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with unannounced space registered through APNIC, largest first.

Unannounced blocks in United Kingdom

19 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1 to 19 of 19
PrefixAddressesRegistryCountryAllocated
103.115.96.0/24256APNICGB15th May 2018
103.177.196.0/23512APNICGB8th Dec 2021
103.179.202.0/23512APNICGB18th Jan 2022
103.231.27.0/24256APNICGB9th May 2014
103.42.230.0/23512APNICGB28th Nov 2022
103.69.204.0/221kAPNICGB20th Jul 2016
119.42.44.0/221kAPNICGB20th Jul 2016
2001:df0:22c0::/4865.5k × /64APNICGB2nd Dec 2021
2001:df4:3280::/4865.5k × /64APNICGB13th Jul 2020
203.8.96.0/212kAPNICGB15th Sept 1994
2400:33e0::/324.3B × /64APNICGB17th Nov 2021
2400:3d20::/324.3B × /64APNICGB8th Dec 2021
2400:4ee0::/324.3B × /64APNICGB18th Jan 2022
2400:83c0::/324.3B × /64APNICGB28th Dec 2016
2400:9e40::/324.3B × /64APNICGB24th Jan 2017
2400:efc0::/324.3B × /64APNICGB31st Mar 2017
2401:a780::/324.3B × /64APNICGB8th Oct 2014
2405:fb80::/324.3B × /64APNICGB20th Jul 2016
2407:1880::/324.3B × /64APNICGB2nd Sept 2016