UK Telephone Code Locator - Telephone Codes, STD Codes The UK Telephone Code Locator takes telephone numbers, std codes, uk dialling codes, any UK phone code, exchange names or the name of a location. The phone number search takes full UK telephone numbers and checks whether they are potentially valid, and, if applicable, gives other information such as the area where the number originates. with codecodesgeographylocatornumbersstdtakestelephoneby 2 users