United Kingdom country & area codes
| Area | Code | Digits |
| Sheffield | (0)114 | + 6/7D SN |
| Shepton Mallet | (0)1749 | + 5/6D SN |
| Shirenewton | (0)1291 | + 5/6D SN |
| Shottisham | (0)1394 | + 5/6D SN |
| Shrewsbury | (0)1743 | + 5/6D SN |
| Sittingbourne | (0)1795 | + 5/6D SN |
| Skegness | (0)1754 | + 5/6D SN |
| Skelmersdale (Rainford) | (0)1695 | + 5/6D SN |
| Skipton | (0)1756 | + 5/6D SN |
| Sleaford | (0)1529 | + 5/6D SN |
| South Molton | (0)1769 | + 5/6D SN |
| Southend-on-Sea | (0)1702 | + 5/6D SN |
| Southport | (0)1704 | + 5/6D SN |
| Spalding | (0)1775 | + 5/6D SN |
| Spilsby | (0)1790 | + 5/6D SN |
| St Austell | (0)1726 | + 5/6D SN |
| St Boswells | (0)1835 | + 5/6D SN |
| St Clears | (0)1994 | + 5/6D SN |
| Stafford | (0)1785 | + 5/6D SN |
| Stamford | (0)1780 | + 5/6D SN |
| Stanford-le-Hope | (0)1268 | + 5/6D SN |
| Stanford-le-Hope | (0)1375 | + 5/6D SN |
| Stirling | (0)1786 | + 5/6D SN |
| Stogumber | (0)1984 | + 5/6D SN |
| Stoke-on-Trent | (0)1782 | + 5/6D SN |
| Stonehaven | (0)1569 | + 5/6D SN |
| Stourbridge | (0)1384 | + 5/6D SN |
| Stourbridge | (0)1386 | + 5/6D SN |
| Stourbridge | (0)1562 | + 5/6D SN |
| Stowmarket | (0)1449 | + 5/6D SN |
| Stranraer | (0)1776 | + 5/6D SN |
| Stratford-upon-Avon | (0)1789 | + 5/6D SN |
| Strathpeffer | (0)1997 | + 5/6D SN |
| Strathy | (0)1641 | + 5/6D SN |
| Strontian | (0)1967 | + 5/6D SN |
| Sudbury | (0)1787 | + 5/6D SN |
| Swaffham | (0)1760 | + 5/6D SN |
| Swanley | (0)1322 | + 5/6D SN |
| Swanley | (0)1689 | + 5/6D SN |
| Swanley | (0)1959 | + 5/6D SN |
| Swansea | (0)1792 | + 5/6D SN |
| Swindon | (0)1793 | + 5/6D SN |
| Tain | (0)1862 | + 5/6D SN |
| Tamworth | (0)1827 | + 5/6D SN |
| Tarbert | (0)1880 | + 5/6D SN |
| Tarporley | (0)1829 | + 5/6D SN |
| Taunton | (0)1823 | + 5/6D SN |
| Tavistock | (0)1822 | + 5/6D SN |
| Temple Cloud | (0)1761 | + 5/6D SN |
| Templecombe | (0)1963 | + 5/6D SN |
| Thame | (0)1844 | + 5/6D SN |
| Thanet | (0)1843 | + 5/6D SN |
| Thetford | (0)1842 | + 5/6D SN |
| Thirsk | (0)1845 | + 5/6D SN |
| Thornhill | (0)1848 | + 5/6D SN |
| Thurso | (0)1847 | + 5/6D SN |
| Tiverton | (0)1884 | + 5/6D SN |
| Tobermory | (0)1688 | + 5/6D SN |
| Tomatin | (0)1808 | + 5/6D SN |
| Tomdoun | (0)1809 | + 5/6D SN |
| Torquay | (0)1803 | + 5/6D SN |
| Torrington | (0)1805 | + 5/6D SN |
| Tranent | (0)1875 | + 5/6D SN |
| Trossachs | (0)1877 | + 5/6D SN |
| Truro | (0)1872 | + 5/6D SN |
| Tunbridge Wells | (0)1892 | + 5/6D SN |
| Turriff | (0)1888 | + 5/6D SN |
| Uckfield | (0)1825 | + 5/6D SN |
| Ullapool | (0)1854 | + 5/6D SN |
| Voe | (0)1806 | + 5/6D SN |
| Wakefield | (0)1924 | + 5/6D SN |
| Warboys | (0)1487 | + 5/6D SN |
| Wareham | (0)1929 | + 5/6D SN |
| Warminster | (0)1985 | + 5/6D SN |
| Warrington | (0)1925 | + 5/6D SN |
| Watford | (0)1923 | + 5/6D SN |
| Weedon | (0)1327 | + 5/6D SN |
| Wellingborough | (0)1933 | + 5/6D SN |
| Wellington | (0)1952 | + 5/6D SN |
| Welshpool | (0)1938 | + 5/6D SN |
| Wem | (0)1939 | + 5/6D SN |
| West Heslerton | (0)1944 | + 5/6D SN |
| Weston-Super-Mare | (0)1934 | + 5/6D SN |
| Wetherby | (0)1937 | + 5/6D SN |
| Whatton | (0)1949 | + 5/6D SN |
| Whitby | (0)1947 | + 5/6D SN |
| Whitchurch | (0)1948 | + 5/6D SN |
| Whitehaven | (0)1946 | + 5/6D SN |
| Wick | (0)1955 | + 5/6D SN |
| Wigan | (0)1942 | + 5/6D SN |
| Wigton | (0)16973 | + 4/5D SN |
| Wigtown | (0)1988 | + 5/6D SN |
| Winchester | (0)1962 | + 5/6D SN |
| Wisbech | (0)1945 | + 5/6D SN |
| Witney | (0)1993 | + 5/6D SN |
| Wolverhampton | (0)1902 | + 5/6D SN |
| Wolverhampton | (0)1922 | + 5/6D SN |
| Wolverton | (0)1908 | + 5/6D SN |
| Worcester | (0)1905 | + 5/6D SN |
| Workington | (0)1900 | + 5/6D SN |