017724 is too long for telephone code in the UK, 01772 is the code for Preston, Lancashire.
Area code 0191 is shared by Newcastle, Sunderland, Durham, Gateshead and other nearby towns.
It's in a rural part of Carmarthenshire, centred on St. Clears.
York.
Wakefield
Taunton
The area code 0121 is in Birmingham.
Leeds postal code is LS , part of WF and also part of BD their area codes are 0113(urban core) 01924(wakefield nos) 01937(wetherby/boston spa 01943(guiseley/otley 01977(pontefract nos
UK area code 01708 (a.k.a. +44 1708) is Romford.
01306 is the area code for Dorking in Surrey.
01420 is for Alton, in Hampshire.
Chipping Norton, Oxfordshire.
The area code of 01702 is for the seaside resort of Southend-on-Sea.
You need to specify the country, because several countries use the term "STD Code" to refer to telephone area codes. See the related questions below.In the UK, 01924 (international: +44 1924) is the area code for Wakefield in Yorkshire.In India, 01924 (international: +91 1924) is the area code for Akhnoor, Jammu and Kashmir.(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
UK area code 01876 is for Lochmaddy in the Outer Hebrides, Scotland (the leading zero is removed when dialing in from outside the country).Note that Scotland is not part of England, though! :-)
Area code 020 is London, including the old "inner London" and "outer London" areas.
India's telephone area code (or "STD Code") 01924, which is +91 1924 in international format, is Akhnoor, Jammu and Kashmir.(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)