"07624 xxxxxx looks like a perfectly ordinary mobile number". No it doesn't. No other mobile network uses numbers starting 076. Manx Telecom was allocated 07624 because it matches their 01624 landline code. In fact 076 is otherwise allocated to pager numbers, some of which can cost much more than a text to the Isle of Man. "+447 cannot be - by definition 'international'". In fact +44 (not +447) is shared between the UK, the Channel Islands and Isle of Man. Obviously, calls between these countries are international. -sent2coventry2003