The so called "freeband" is just about everything between 27.410 and 28.000, plus a 40 channel segment below 26.965 (I think). In these segments, many unlicensed individuals do their DX:ing, mainly on SSB. But to call these segments "freeband" is very misleading as they are allocated to a host of government, military, bussiness and other users in a number of countries. Of course the legal use of these segments is probably extremely low, and therefore all this "freebanding", or maybe it is the other way around? Anyway, there are quite a number of CB radios manufactured with the possibility of extended frequency coverage.

One exception in the "freeband" segment is that the UK also have an older allocation for CB here, namely 27.60125-27.99125, divided into 40 channels. Strange but true.