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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Unannounced blocks in United Kingdom

2,614 blocks match, ordered by prefix.

Allocated but unannounced blocks, 451 to 500 of 2614
PrefixAddressesRegistryCountryAllocated
192.136.18.0/24256RIPE NCCGB19th Dec 1991
192.136.29.0/24256RIPE NCCGB23rd Dec 1991
192.136.40.0/24256RIPE NCCGB24th Dec 1991
192.138.1.0/24256RIPE NCCGB2nd Jan 1992
192.138.156.0/23512RIPE NCCGB8th Jan 1992
192.138.158.0/24256RIPE NCCGB8th Jan 1992
192.138.192.0/24256RIPE NCCGB15th Jan 1992
192.138.2.0/23512RIPE NCCGB2nd Jan 1992
192.138.229.0/24256RIPE NCCGB17th Jan 1992
192.138.248.0/24256RIPE NCCGB22nd Jan 1992
192.138.4.0/221kRIPE NCCGB2nd Jan 1992
192.138.8.0/24256RIPE NCCGB2nd Jan 1992
192.145.52.0/221kRIPE NCCGB10th Dec 2018
192.146.123.0/24256RIPE NCCGB24th Jan 1992
192.146.228.0/24256RIPE NCCGB7th Feb 1992
192.147.150.0/24256RIPE NCCGB15th Feb 1992
192.147.212.0/24256RIPE NCCGB17th Feb 1992
192.147.217.0/24256RIPE NCCGB17th Feb 1992
192.147.219.0/24256RIPE NCCGB18th Feb 1992
192.147.228.0/24256RIPE NCCGB19th Feb 1992
192.147.23.0/24256RIPE NCCGB10th Feb 1992
192.147.36.0/24256RIPE NCCGB12th Feb 1992
192.148.177.0/24256RIPE NCCGB28th Feb 1992
192.148.178.0/24256RIPE NCCGB28th Feb 1992
192.148.179.0/24256RIPE NCCGB28th Feb 1992
192.148.180.0/24256RIPE NCCGB28th Feb 1992
192.148.181.0/24256RIPE NCCGB28th Feb 1992
192.148.182.0/24256RIPE NCCGB28th Feb 1992
192.148.183.0/24256RIPE NCCGB28th Feb 1992
192.148.184.0/24256RIPE NCCGB28th Feb 1992
192.148.185.0/24256RIPE NCCGB28th Feb 1992
192.148.186.0/24256RIPE NCCGB28th Feb 1992
192.148.194.0/24256RIPE NCCGB2nd Mar 1992
192.148.198.0/24256RIPE NCCGB3rd Mar 1992
192.148.199.0/24256RIPE NCCGB3rd Mar 1992
192.148.216.0/24256RIPE NCCGB3rd Mar 1992
192.149.121.0/24256RIPE NCCGB10th Mar 1992
192.149.238.0/24256RIPE NCCGB24th Mar 1992
192.149.57.0/24256RIPE NCCGB27th Feb 1992
192.149.60.0/24256RIPE NCCGB2nd Mar 1992
192.150.106.0/24256RIPE NCCGB10th Mar 1992
192.150.140.0/24256RIPE NCCGB13th Mar 1992
192.150.177.0/24256RIPE NCCGB17th Mar 1992
192.150.178.0/24256RIPE NCCGB17th Mar 1992
192.150.179.0/24256RIPE NCCGB17th Mar 1992
192.150.180.0/24256RIPE NCCGB17th Mar 1992
192.150.181.0/24256RIPE NCCGB17th Mar 1992
192.150.182.0/24256RIPE NCCGB17th Mar 1992
192.150.183.0/24256RIPE NCCGB17th Mar 1992
192.150.198.0/24256RIPE NCCGB18th Mar 1992