Royal Mail Access Selection Files 2013 Release 85 - For use on or after 2nd February 2026

Fixed Field Width ASCII

Changes applied in this release:

There are 2 new postcode sectors:
MK3, 	4, 	34308, 	B
SO50, 	3, 	40304, 	B


MECHAZ.DAT - Please note this file is no longer available, please use SORTAZ.DAT.

MECHB.DAT - Please note this file is no longer available, please use SORTB.DAT.

SORTAZ.DAT
Postcode / Access 70 Selection Code / Zonal look-up table

SORTB.DAT
Line listing text & Geographic sequencing details for Access 70

SORTC.DAT
Post Town code look-up table for non-Postcoded addresses

SORTD.DAT
Geographic area definitions


Each field is of fixed width and therefore occupies the same position within each record. Records are terminated by Carriage Return (ASCII: 13) and Line Feed (ASCII: 10) characters.

If you have any technical queries, please do not hesitate to contact the Royal Mail Wholesale Technical Helpline on 020 7371 3237, or visit: http://www.royalmailwholesale.com/
