Memorable Telephone Number - Clerkenwell 0207_336_0000 for sale or rent. Buy the number outright to use on our network (or port away to your existing telephone provider) or simply rent from us . Ideal for a taxi company or fast food delivery company. Just call us on 0207_336_0000 and make an offer and if we're happy and you're happy then the number's yours! Numbers can be connected the same!