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National Location Codes (NLCs) are six character codes (usually digits) which identify locations on the railway - including stations, sidings and booking offices. Some reference other entities, as described below.

They are used for retail purposes and do not play a part in train planning or running.

The first four digits reference a location, and the last two digits indicate sub-location. For example:

  • 144400 is London Euston, with TIPLOC 'EUSTON', normally referenced in retail systems as 1444
  • 144401 is the Backing Out Roads, TIPLOC 'EUSBOR'
  • 144431 is WC Euston Ticket Collectors, with no associated TIPLOC, possibly used - or formerly used - for accounting purposes for Revenue Control staff based at Euston

Other entities at the same location may have a completely different NLC, for example 105800 (or 1058) is Euston Local Tickets - the smaller ticket office by platforms 8-11 at Euston. This was formerly a Network SouthEast ticket office, and may have been allocated its own NLC to disassociate itself with the main station.

The first digit of the NLC indicates the location:

  • 0 indicates a 'group' station, a pseudo-destination, a London Underground station, or one of the London Fares Zones
  • 1-9 indicates a National Rail station, including self-service ticket machines
  • G, H, J, K and L are usually Private Settlement locations, such as PlusBus destinations, or add-ons to existing tickets
  • I are usually used for accountancy purposes
  • M and N are usually Irish stations

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