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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with unannounced space registered through RIPE NCC, largest first.

Unannounced blocks registered through RIPE NCC

25,269 blocks match, ordered by prefix.

Allocated but unannounced blocks, 601 to 650 of 25269
PrefixAddressesRegistryCountryAllocated
151.216.6.0/24256RIPE NCCPL5th Aug 2026
151.237.236.0/24256RIPE NCCGB16th Aug 2012
151.237.248.0/212kRIPE NCCDE16th Aug 2012
151.237.8.0/23512RIPE NCCGB16th Aug 2012
151.249.96.0/212kRIPE NCCUA21st Aug 2012
151.252.96.0/212kRIPE NCCPS23rd Aug 2012
151.85.0.0/1665.5kRIPE NCCIT13th May 1991
151.86.0.0/1665.5kRIPE NCCIT13th May 1991
151.94.0.0/1665.5kRIPE NCCIT13th May 1991
152.114.197.0/24256RIPE NCCES1st Jan 1984
152.114.198.0/23512RIPE NCCES1st Jan 1984
152.114.212.0/221kRIPE NCCGB1st Jan 1984
152.114.228.0/221kRIPE NCCSA1st Jan 1984
152.150.0.0/1665.5kRIPE NCCGB1st Sept 1993
152.234.128.0/198.2kRIPE NCCAE6th Mar 2025
152.234.192.0/1816.4kRIPE NCCUS6th Mar 2025
152.237.64.0/198.2kRIPE NCCLT6th Mar 2025
152.55.156.0/221kRIPE NCCBE8th Aug 1994
152.89.128.0/221kRIPE NCCRO25th Jan 2019
152.89.136.0/221kRIPE NCCES25th Jan 2019
152.89.152.0/221kRIPE NCCNL25th Jan 2019
152.89.156.0/221kRIPE NCCPS25th Jan 2019
152.89.200.0/221kRIPE NCCNL28th Jan 2019
152.89.212.0/221kRIPE NCCDE28th Jan 2019
152.89.24.0/221kRIPE NCCGB23rd Jan 2019
152.89.40.0/221kRIPE NCCPS23rd Jan 2019
152.89.8.0/221kRIPE NCCBZ23rd Jan 2019
152.89.88.0/221kRIPE NCCDE24th Jan 2019
152.95.0.0/1665.5kRIPE NCCDK3rd Sept 1991
153.15.0.0/1665.5kRIPE NCCUS1st Sept 1993
153.17.0.0/1665.5kRIPE NCCDE23rd Sept 1991
153.51.160.0/198.2kRIPE NCCRU23rd Sept 1991
153.51.32.0/198.2kRIPE NCCRU23rd Sept 1991
153.51.64.0/198.2kRIPE NCCRU23rd Sept 1991
153.55.176.0/204.1kRIPE NCCBZ23rd Sept 1991
153.56.0.0/1732.8kRIPE NCCAE23rd Sept 1991
153.56.144.0/24256RIPE NCCAZ23rd Sept 1991
153.56.145.0/24256RIPE NCCAE23rd Sept 1991
153.56.146.0/23512RIPE NCCAE23rd Sept 1991
153.56.148.0/24256RIPE NCCAE23rd Sept 1991
153.56.152.0/23512RIPE NCCAE23rd Sept 1991
153.56.173.0/24256RIPE NCCSA23rd Sept 1991
153.56.174.0/23512RIPE NCCSA23rd Sept 1991
153.56.185.0/24256RIPE NCCTR23rd Sept 1991
153.56.186.0/23512RIPE NCCTR23rd Sept 1991
153.56.190.0/23512RIPE NCCTR23rd Sept 1991
153.56.192.0/212kRIPE NCCAT23rd Sept 1991
153.56.224.0/198.2kRIPE NCCAE23rd Sept 1991
153.59.0.0/1665.5kRIPE NCCFR23rd Sept 1991
153.60.192.0/1816.4kRIPE NCCDE23rd Sept 1991