I've had a couple of silent phone calls from 01158507616. It seems that Jigsaw Insurance Marketing (UK) Ltd of 3rd floor, 16, King St, Nottingham, Nottinghamshire NG1 2AS are notorious nuisance callers.
swik.net/Debian/Planet+Debian/MJ+Ray:+Jigsaw+Insurance+Marketing+Spam+Phone+Calls/udxt
