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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

2,683 blocks match, ordered by prefix.

Allocated but unannounced blocks, 51 to 100 of 2683
PrefixAddressesRegistryCountryAllocated
145.227.0.0/1665.5kRIPE NCCGB13th Oct 1993
145.229.0.0/1665.5kRIPE NCCGB7th Jun 1993
146.0.57.0/24256RIPE NCCGB7th Jul 2011
147.119.0.0/1665.5kRIPE NCCGB25th Nov 1992
147.184.0.0/1665.5kRIPE NCCGB5th Jul 1991
147.185.195.0/24256RIPE NCCGB5th Jul 1991
147.189.0.0/204.1kRIPE NCCGB8th Jul 1991
147.189.154.0/24256RIPE NCCGB8th Jul 1991
147.189.160.0/24256RIPE NCCGB8th Jul 1991
147.189.215.0/24256RIPE NCCGB8th Jul 1991
147.189.240.0/204.1kRIPE NCCGB8th Jul 1991
147.193.0.0/1665.5kRIPE NCCGB9th Jul 1991
147.201.0.0/1665.5kRIPE NCCGB1st Sept 1993
147.77.0.0/1665.5kRIPE NCCGB11th Jul 1991
147.89.0.0/1665.5kRIPE NCCGB19th Jul 1991
148.176.0.0/1665.5kRIPE NCCGB1st Sept 1993
148.181.0.0/1665.5kRIPE NCCGB16th May 1991
148.185.0.0/1665.5kRIPE NCCGB1st Sept 1993
148.253.192.0/204.1kRIPE NCCGB1st Sept 1993
148.64.56.0/221kRIPE NCCGB11th Apr 1991
149.178.0.0/15131kRIPE NCCGB13th May 1991
149.180.128.0/1732.8kRIPE NCCGB13th May 1991
149.181.128.0/1732.8kRIPE NCCGB13th May 1991
149.182.0.0/15131kRIPE NCCGB13th May 1991
149.184.0.0/15131kRIPE NCCGB13th May 1991
149.187.0.0/1732.8kRIPE NCCGB13th May 1991
149.189.0.0/1665.5kRIPE NCCGB13th May 1991
149.191.0.0/1665.5kRIPE NCCGB13th May 1991
149.192.0.0/14262kRIPE NCCGB13th May 1991
149.196.0.0/1665.5kRIPE NCCGB13th May 1991
150.237.128.0/1732.8kRIPE NCCGB12th Aug 1991
150.237.16.0/204.1kRIPE NCCGB12th Aug 1991
150.237.64.0/1816.4kRIPE NCCGB12th Aug 1991
150.251.208.0/204.1kRIPE NCCGB19th Aug 1991
151.180.0.0/1665.5kRIPE NCCGB17th Sept 1991
151.211.0.0/1665.5kRIPE NCCGB25th Sept 1991
151.212.0.0/1665.5kRIPE NCCGB25th Sept 1991
151.237.236.0/24256RIPE NCCGB16th Aug 2012
151.237.8.0/23512RIPE NCCGB16th Aug 2012
152.114.212.0/221kRIPE NCCGB1st Jan 1984
152.150.0.0/1665.5kRIPE NCCGB1st Sept 1993
152.89.24.0/221kRIPE NCCGB23rd Jan 2019
153.79.168.0/212kRIPE NCCGB23rd Sept 1991
155.249.0.0/1665.5kRIPE NCCGB1st Sept 1993
157.173.32.0/198.2kRIPE NCCGB1st Sept 1993
157.173.64.0/204.1kRIPE NCCGB1st Sept 1993
157.228.192.0/1816.4kRIPE NCCGB7th Apr 2004
157.96.112.0/221kRIPE NCCGB7th Apr 2004
157.96.12.0/23512RIPE NCCGB7th Apr 2004
157.96.124.0/221kRIPE NCCGB7th Apr 2004