在上世纪90年代中期建成本地电话网前，每个县都有自己的区号，所有地级市创建成本地电话网后，五位区号全部消失，全部三位或四位化。
加括号的是在很早的时候（自从开通程控电话那一刻或者在建成本地电话网前提出更改区号时）就已停用了的区号，或者有些不确定是否存在过）
河北：0311石家庄0312保定0313张家口0314承德0315唐山0316廊坊0317沧州0318衡水0319邢台0310邯郸0335秦皇岛03211正定03212新乐03213无极03214深泽03215辛集03216晋县03217藁城03218栾城03219赵县03210元氏03221赞皇03222高邑03223鹿泉03224井径03225平山03226灵寿03227行唐03231涞水03232徐水03233定兴03234涿州03235新城03236容城03237雄县03238安新03239高阳03230满城03241蠡县03242博野03243安国03244定州03245曲阳03246唐县03247望都03248顺平03249阜平03240涞源03251永清03252霸州03253大城03254文安03255固安03256香河03257大厂03258三河03261武强03262武邑03263阜城03264景县03265故城03266枣强03267冀县03268深县03269安平03260饶阳03271内丘03272临城03273柏乡03274宁晋03275龙尧03276巨鹿03277新河03278南宫03279清河03270临西03281威县03282广宗03283平乡03284南和03285任县03286沙河03287广平03288磁县03289涉县03280武安03291永年03292鸡泽03293曲周03294邱县03295馆陶03296大名03297魏县03298临漳03299肥乡03290成安03201隆化03202围场03203平泉03204宽城03205丰宁03206兴隆03207滦平03208卢龙03209青龙03200昌黎03411遵化03412滦县03415滦南03416乐亭03417唐海03418丰南03419丰润03410玉田03422迁西03423迁安03424河间03425肃宁03426任丘03431青县03432黄骅03433海兴03434盐山03435孟村03436南皮03437东光03438吴桥03439泊头03430献县03441万全03442张北03443崇礼03444沽源03445赤城03446怀来03447涿鹿03448蔚县03449阳原03440怀安03451尚义03452康保03453宣化