help improve this article by adding reliable references . Unsourced material may be challenged and removed. (March 2008) Fochriw Welsh : Fochriw OS grid reference SO107058 Principal area Caerphilly Ceremonial county Mid Glamorgan Constituent country Wales Sovereign state United Kingdom Post town Bargoed Postcode district CF81 Dialling code 01685 Police Gwent Fire South Wales Ambulance Welsh European Parliament Wales UK Parliament