UK telephone numbers beginning with 03xx (or +44 3xx in international format) are nationwide non-geographic numbers. Numbers beginning with 030x (or +44 30x) are reserved for qualifying public bodies and non-profit organisations.
(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.)
Parker, CO, is in area code 303 and overlay code 720.
Area code 303 and overlay area code 720 serve the Denver, Colorado, and surrounding central Colorado areas, including Boulder, Longmont, Aurora, Arvada, Westminster, Sheridan, Englewood, Greenwood Village, and Edgewater.Area code 303 is overlaid with area code 720, meaning that the same physical service area is served by both area codes (303 and 720) and that ten-digit dialing is required for all local calls made within the service area.(Originally, the 303 area code covered the entire state of Colorado. Area code 719 is the southeastern part of Colorado. Area code 970 is the western and northern part.)
303 and sometimes 720
The country code and area code of Nsoko, Swaziland is 268, 303.
The country code and area code of KungÌ_lv, Sweden is 46, (0)303.
All UK area codes begin with a 0. There is no area code 6010 in the UK, and there is no 06010 code either.
UK area code 020 is London.
Area code 303 and overlay area code 720 serve the Denver, Colorado, and surrounding central Colorado areas, including Boulder, Longmont, Aurora, Arvada, Westminster, Sheridan, Englewood, Greenwood Village, and Edgewater.Area code 303 is overlaid with area code 720, meaning that the same physical service area is served by both area codes (303 and 720) and that ten-digit dialing is required for all calls made within the service area.(Area code 719 is the southeastern part of Colorado. Area code 970 is the western and northern part.)
There is no area code 20 in the UK
There is no 01134 code in the UK.
Boulder CO is in area codes 303 and 720, same as Denver.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.