The Area Codes of United Kingdom: City/Town or RegionArea code 1.Macclesfield01625 (+441625) 2.Machynlleth01654 (+441654) 3.Madingley01954 (+441954) 4.Magherafelt (Northern Ireland)02879 (+442879) 5.Maidenhead01628 (+441628) 6.Maidstone01622 (+441622) 7.Maldon01621 (+441621) 8.Mallaig01687 (+441687) 9.Malmesbury01666 (+441666) 10.Malton01653 (+441653) 11.Malvern01684 (+441684) 12.Manchester0161 (+44161) 13.Mansfield01623 (+441623) 14.Market Deeping/Bourne01778 (+441778) 15.Market Drayton01630 (+441630) 16.Market Harborough01858 (+441858) 17.Market Rasen01673 (+441673) 18.Market Weighton and North Cave01430 (+441430) 19.Marlborough01672 (+441672) 20.Martin01526 (+441526) 21.Martinstown (Northern Ireland)02821 (+442821) 22.Matlock01629 (+441629) 23.Maud01771 (+441771) 24.Maybole01655 (+441655) 25.Medway01634 (+441634) 26.Melton Mowbray01664 (+441664) 27.Meriden01676 (+441676) 28.Merthyr Tydfil01685 (+441685) 29.Mid Yell01957 (+441957) 30.Middlesbrough01642 (+441642) 31.Milford Haven01646 (+441646) 32.Milton Keynes01908 (+441908) 33.Minehead01643 (+441643) 34.Moffat01683 (+441683) 35.Mold01352 (+441352) 36.Monmouth01600 (+441600) 37.Montrose01674 (+441674) 38.Moretonhampstead01647 (+441647) 39.Morpeth01670 (+441670) 40.Moscow01560 (+441560) 41.Motherwell01698 (+441698)