a local call; the same principle applied for local calls within the other AFN areas. This restriction was eventually phased out as exchanges were modernised and the STD code was shown in brackets to standardise with the format used in non-AFN areas, e.g. Canterbury (0227) 234567. The term 'Area Code' also replaced 'STD Code' which had become outdated. In May 1990, the single London area was split into two areas because of increased demand. Inner London was given the code 071, such as (071) 222 1234, and the rest 081. A local number (e.g. 222 1234) could then be used twice within London - once in 071 and again in 081. The local numbers remained as seven digits. This doubled the numbers available for London, but it also meant that a caller, though within London, might have had to dial the area code to reach another 'London' number. Although call charges between the adjacent areas remained at a local rate, some may have believed charges within the city increased as a result. To free up more numbers across the UK for future use, on Easter Sunday, 16 April 1995 (dubbed "PhONEday"), an extra digit "1" was inserted after the initial zero into all except five geographical area codes nationwide, so inner and outer London became 0171 and 0181 respectively: for example, (0171) 222 1234. At the same time, those five other places gained a brand new 011x area code. The town of Reading later was allocated an 011x code to replace its former code as available numbers quickly became scarce after PhONEday, being done in stages between 1996 and 1998. Reunification Further increased demand for telephone numbers in London led to the need for more number-space; rather than again split area codes, it was decided to merge the 0171 and 0181 area codes back into one but add an extra digit to the start of each London local number, thus increasing the available numbers by a factor of 5: 7 digit range = 200 0000 - 998 9999 giving 7,990,000 numbers dialable without the area code ( 0171 or 0181) - 15,980,000 across the area of the two codes. 8 digit range (levels 7 and 8 only) = 7000 0000 - 8999 9999 giving 18,000,000 numbers dialable without the area code. [Though it is doubtful that 7999 xxxx and 8999 xxxx were allocated because if the initial digit were omitted