National Numbering Plans (Telefonvorwahl) Union internationale des télécommunications (UIT / UTI) ITU Nationaw Numbering Pwans ITU National Numbering Plans Telefonvorwahlen ITU National Numbering Plan Links "National Numbering Plans" olasz mobilra mutat national numbering plan information 国际电信联盟关于电话号码分类计划介绍 national numbering plan information national numbering plan information National Numbering Plans national numbering plan information http://www.itu.int/oth/T0202.aspx?parent=T0202 www.itu.int http://www.itu.int/oth/T0202.aspx?parent=T0202