01489 is the national dialling code for Hamble Valley in the United Kingdom. Before PhONEday the area code was 0489, with the mnemonic HV 9 where HV are taken from the letters H and V in Hamble Valley – an unofficially recognised geographic area surrounding the River Hamble in Hampshire. The dialling code is rarely ever referred to as Hamble Valley (and its name appears to be generally unfamiliar to the residents of the area that it serves), but is instead referred to as Botley, or less frequently (except by residents of the immediate area) as Bishop's Waltham or Locks Heath.In common with all other British area codes the initial '0' is a trunk prefix that is not required when dialling from abroad.