These are the codes used in the fleet list to indicate all current pool allocations for all members of the class. I have also included a total count of all the class 66's allocated to each pool. The list is alphabetically sorted by pool code. Some notes:
- Freightliner have (almost) all their polish 66's allocated to a storage pool (DHLT), although in Poland they are all in active service as far as is currently known.
- Pool code descriptions are based on those available on the RCTS website here.