(03 Jul 2022, 11:42 pm)wibblejunior wrote Seems to be mostly the same within Durham and Darlington.

1-19 - Darlington/Bishop Auckland area local services
2x - East Durham local services 
3x - unused
4x - West Durham local services
5x - services via Bowburn/Coxhoe
6x - Durham City local services
7x - ???
8x - Bishop Auckland local services
9x - Barnard Castle local services

The X12, X26/X27 and X66/X67 seem to be the main exceptions here.

7x are traditionally Barnard Castle local services, town services 70/71/72/74, wednesday only 73 and X75/X76 (formerly 75/76). 95 and 96 are only so numbered as they were previously operated by Arriva as a continuation of the 75/76 from Barnard Castle.