Use the search functions above to search for train services by signalling ID / headcode. Optionally, choose a date and operator.
Similarly to the live train times search, results will be shown in order of departure, along with their live running information.
You can use this feature to search by:
- Regular service headcode
- Obfuscated TRUST headcode
- Altered headcode from change of ID
A headcode is a 4 character code used to identify trains across the UK rail network. Headcodes follow a number-letter-number-number sequence.
The First Number
The first number identifies the class of train, as outlined below:
- 1 Indicates an express train with limited stops, with exceptions (test trains, 1Z99 rescue trains)
- 2 Indicates a slow train with frequent stops, with exceptions (2Z02 Caroline and 2Qxx test trains)
- 3 Test trains (followed by a Q), priority ECS and railhead conditioning trains
- 4 Fast freight usually 75mph max
- 5 Empty coaching stock moves
- 6 General freight with a max speed of 60mph
- 7 Slower freight with a max speed of 45mph
- 8 Severely limited trains and rail head conditioning trains
- 9 Services that are subject to special operating requirements on certain parts of the network
The Letter
Historically the second character, a letter, held significance to the region of the train's route. Whilst this still exists in some instances, the letter now mostly identifies particular routes within a region.
Eg a 2C working might relate to Brighton to Seaford services in the South East, but also Exeter to Barnstaple services in the West.
With working timetable freight services, the letter does still hold significance to the region. Some examples, plus others, below.
- Q Network Rail workings and stock moves
- X Services out of gauge
- Z Short Term Plan workings
- S Scotland originating freight
- V Great Western originating freight including Acton
- M Midlands originating freight
- G (Engineers) GBRF
- Y (Engineers) Freightliner
- R (Engineers) DBC (often also uses N and T)
- C (Engineers) Colas
The Last Two Numbers
Usually the last two numbers refer to the time of departure and with passenger services these will usually increment throughout the day.
- 1A01 An express passenger service, likely the first of the day as the last two digits are low.
- 3Q03 A test train, probably worked by a class 37.
- 6V00 A freight train max speed 60mph, probably aggregates or petroleum.
