Country calling codes or country dial-in codes are telephone number prefixes for reaching telephone subscribers in the networks of the member countries or regions of the International Telecommunication Union (ITU). The codes are defined by the ITU-T in standards E.123 and E.164.

  en.wikipedia.org

  www.nationsonline.org

  www.dialling-codes.co.uk

  www.ramcomminc.com

  www.scribd.com

  www.dialingcode.com

  www.phonenumbers.ie

  www.studyabroad.com

  www.auslandsvorwahlen.net

  www.timeanddate.com

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