Telephone numbers in Singapore digits. Five digits were introduced in 1960s, whereas 5-digit and 6-digit phone numbers were introduced in 1960s as fixed lines grew, but in that year, these changed to seven digits as the introduction of new towns arose (Tampines, Jurong East, Bukit Batok, Yishun and Hougang) and a large number of new numbers were required. Rationalisation was based on geographical locale over the 12 years. In 1995, the digit '9' was added to the front of mobiland pager numbers, making numbers eight digits, and on 1 March 2002, the digit '6' was added to the front of existing fixed line telephone
Non-geographic telephone numbers in the United Kingdom calling such numbers continued to vary considerably; some landline tariffs now included 0870 numbers in inclusive allowances, while mobile operators charged a premium for calling such numbers. Many organisations changed to using other 084 and 087 numbers through which they could continue to receive an income from call costs. From 2008, the higher-rate 0871 and 0872 numbers began being regulated by the premium-rate telecoms regulator, PhonepayPlus. On 1 July 2015, a simplified universal charging system was introduced for 087 numbers and all other 'service numbers'. Calls to all 087 numbers now consist of a 'service charge' of up to 13p