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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

2,629 blocks match, ordered by prefix.

Allocated but unannounced blocks, 101 to 150 of 2629
PrefixAddressesRegistryCountryAllocated
152.150.0.0/1665.5kRIPE NCCGB1st Sept 1993
153.56.170.0/24256RIPE NCCGB23rd Sept 1991
155.249.0.0/1665.5kRIPE NCCGB1st Sept 1993
157.173.32.0/221kRIPE NCCGB1st Sept 1993
157.173.40.0/212kRIPE NCCGB1st Sept 1993
157.173.48.0/204.1kRIPE NCCGB1st Sept 1993
157.173.64.0/221kRIPE NCCGB1st Sept 1993
157.96.38.0/24256RIPE NCCGB7th Apr 2004
157.96.90.0/23512RIPE NCCGB7th Apr 2004
157.96.94.0/23512RIPE NCCGB7th Apr 2004
158.119.0.0/1665.5kRIPE NCCGB28th Feb 1992
158.124.0.0/1665.5kRIPE NCCGB2nd Mar 1992
158.152.0.0/1665.5kRIPE NCCGB13th Mar 1992
158.178.254.0/23512RIPE NCCGB24th Mar 1992
158.179.0.0/24256RIPE NCCGB24th Mar 1992
158.180.224.0/23512RIPE NCCGB24th Mar 1992
158.180.96.0/198.2kRIPE NCCGB24th Mar 1992
158.218.0.0/1665.5kRIPE NCCGB1st Apr 1992
159.100.176.0/204.1kRIPE NCCGB31st Mar 1992
159.114.0.0/1665.5kRIPE NCCGB1st Sept 1993
159.167.0.0/1665.5kRIPE NCCGB1st Sept 1993
159.170.0.0/1665.5kRIPE NCCGB1st Jan 1984
159.180.64.0/198.2kRIPE NCCGB1st Sept 1993
159.219.0.0/1665.5kRIPE NCCGB1st Sept 1993
159.30.0.0/1665.5kRIPE NCCGB1st Sept 1993
160.104.0.0/1665.5kRIPE NCCGB5th Apr 2004
160.38.0.0/1665.5kRIPE NCCGB1st Sept 1993
163.169.0.0/1665.5kRIPE NCCGB8th Sept 1992
164.153.24.0/221kRIPE NCCGB14th Feb 2019
164.36.0.0/1665.5kRIPE NCCGB23rd Nov 1992
164.6.0.0/1665.5kRIPE NCCGB25th Sept 1992
164.93.128.0/1732.8kRIPE NCCGB12th Nov 2013
165.65.196.0/221kRIPE NCCGB12th Apr 1993
165.65.200.0/221kRIPE NCCGB12th Apr 1993
171.28.0.0/15131kRIPE NCCGB9th Jan 1995
171.30.0.0/1665.5kRIPE NCCGB9th Jan 1995
172.111.32.0/24256RIPE NCCGB7th Jul 2021
176.10.94.0/24256RIPE NCCGB29th Jan 2025
176.113.45.0/24256RIPE NCCGB3rd Jul 2020
176.122.192.0/23512RIPE NCCGB26th Jul 2012
176.124.249.0/24256RIPE NCCGB24th Jul 2023
176.126.116.0/24256RIPE NCCGB26th Oct 2021
176.126.117.0/24256RIPE NCCGB26th Oct 2021
178.107.64.0/1816.4kRIPE NCCGB18th Nov 2009
178.18.118.0/24256RIPE NCCGB13th Apr 2010
178.215.128.0/204.1kRIPE NCCGB15th Jul 2010
178.216.244.0/24256RIPE NCCGB8th Jul 2020
178.249.40.0/212kRIPE NCCGB19th May 2010
178.250.72.0/212kRIPE NCCGB2nd Jun 2010
185.0.24.0/24256RIPE NCCGB9th Sept 2026