Area code 55 serves Mexico City and its metropolitan area. The area code was created in 2002 as a result of the consolidation of area codes and the realignment of numbering. The consolidation mandated by the Plan Nacional de Numeracion (PNN), assigned area codes based on geography, and took place during the process of phone numbering restructure in Mexico. The process objective was to alleviate saturation of existing area codes and consisted of progressively transferring numbers from the area code to the local number.

The area code 55 covers an extensive surface and it is close to exhaustion with approximately 72,960,518 numbers assigned to this area code as of November 2018. A new overlaying area code has been assigned to Mexico City to address this issue. The new area code is 56.

States in the area code: 2 State INEGI Code Ciudad de Mexico 09 Estado de Mexico 15

Municipalities in the area code: 45 Municipality INEGI Code TEMAMATLA 15083 GUSTAVO A. MADERO 09005 IZTACALCO 09006 MILPA ALTA 09009 TEPOTZOTLAN 15095 COACALCO DE BERRIOZABAL 15020 COCOTITLAN 15022 TULTEPEC 15108 COYOACAN 09003 ALVARO OBREGON 09010 TLAHUAC 09011 ATIZAPAN DE ZARAGOZA 15013 IXTAPALUCA 15039 LA MAGDALENA CONTRERAS 09008 MIGUEL HIDALGO 09016 VALLE DE CHALCO SOLIDARIDAD 15122 LERMA 15051 TLALPAN 09012 XOCHIMILCO 09013 VENUSTIANO CARRANZA 09017 CHALCO 15025 CHIMALHUACAN 15031 ISIDRO FABELA 15038 JILOTZINGO 15046 NEXTLALPAN 15059 LA PAZ 15070 TLALNEPANTLA DE BAZ 15104 CUAUHTEMOC 09015 ECATEPEC DE MORELOS 15033 HUIXQUILUCAN 15037 NAUCALPAN DE JUAREZ 15057 NICOLAS ROMERO 15060 CUAUTITLAN IZCALLI 15121 TECAMAC 15081 IZTAPALAPA 09007 CUAUTITLAN 15024 JALTENCO 15044 MELCHOR OCAMPO 15053 TONANITLA 15125 TULTITLAN 15109 BENITO JUAREZ 09014 CHICOLOAPAN 15029 AZCAPOTZALCO 09002 CUAJIMALPA DE MORELOS 09004 NEZAHUALCOYOTL 15058

Cities and Towns in the area code: 117 Town INEGI Code ACOLMAN DE NEZAHUALCOYOTL 150020001 ALVARO OBREGON 090100001 AXOTLAN 151210007 AZCAPOTZALCO 090020001 BENITO JUAREZ 090140001 BOSQUES DE COACALCO 150200038 BUENAVISTA 151090003 CABAÑAS, LAS 150950028 CABI, EL 150830006 CAÑADA, LA 150370043 CEDROS, LOS 090120249 CHALCO DE DIAZ COVARRUBIAS 150250001 CHICOLOAPAN DE JUAREZ 150290001 CHIMALHUACAN 150310001 CIUDAD LOPEZ MATEOS 150130001 CIUDAD NEZAHUALCOYOTL 150580001 COATEPEC 150390004 COCOTITLAN 150220001 COLONIA EL MIRADOR 150600071 CONCEPCION, LA 150600029 COYOACAN 090030001 CUAJIMALPA DE MORELOS 090040001 CUAUHTEMOC 090150001 CUAUTITLAN 150240001 CUAUTITLAN IZCALLI 151210001 ECATEPEC DE MORELOS 150330001 EJIDO DE SAN JUAN TLIHUACAN 150130104 EJIDO EL CAPULIN 150390083 FUENTES DEL VALLE 151090068 GENERAL MANUEL AVILA CAMACHO 150390007 GUSTAVO A. MADERO 090050001 HUIXQUILUCAN DE DEGOLLADO 150370001 IXTAPALUCA 150390001 IZTACALCO 090060001 IZTAPALAPA 090070001 KM. 38 090120129 LAUREL, EL 150370010 LLANO DE LAS FLORES (BARRIO DEL HUESO) 150570258 LOMA DEL RIO 150600063 MAGDALENA CHICHICASPA 150370013 MAGDALENA CONTRERAS, LA 090080001 MELCHOR OCAMPO 150530001 MIGUEL HIDALGO 090160001 NAUCALPAN DE JUAREZ 150370071 NAUCALPAN DE JUAREZ 150570001 OJO DE AGUA 150810019 PARRES (EL GUARDA) 090120019 PEDREGAL, EL 150130105 PROGRESO INDUSTRIAL 150600016 RANCHO COXTITLAN 150290036 RANCHO TLALMIMILOLPAN 150290035 REYES ACAQUILPAN, LOS 150700001 RIO FRIO DE JUAREZ 150390011 SALAZAR 150510015 SAN ANDRES MIXQUIC 090110011 SAN ANTONIO TECOMITL 090090011 SAN BARTOLOME XICOMULCO 090090015 SAN FRANCISCO ACUAUTLA 150390012 SAN FRANCISCO CHIMALPA 150570088 SAN FRANCISCO COACALCO 150200001 SAN FRANCISCO MAGU 150600018 SAN FRANCISCO TECOXPA 090090017 SAN GREGORIO CUAUTZINGO 150250005 SAN JACINTO 150370022 SAN JOSE EL VIDRIO 150600020 SAN JOSE TEJAMANIL 150570239 SAN JUAN DE LAS TABLAS 150600021 SAN JUAN IXTAYOPAN 090110021 SAN LORENZO ACOPILCO 090040020 SAN LORENZO TLACOYUCAN 090090152 SAN LUIS AYUCAN 150460003 SAN MARTIN CUAUTLALPAN 150250014 SAN MATEO HUITZILZINGO 150250016 SAN MATEO IXTACALCO 150240088 SAN MIGUEL AJUSCO 090120026 SAN MIGUEL TOPILEJO 090120027 SAN NICOLAS TETELCO 090110024 SAN PABLO ATLAZALPAN 150250019 SAN PABLO DE LAS SALINAS 151090025 SAN PABLO OZTOTEPEC 090090024 SAN PEDRO ATOCPAN 090090029 SANTA ANA JILOTZINGO 150460001 SANTA ANA NEXTLALPAN 150590001 SANTA ANA TLACOTENCO 090090036 SANTA CATARINA AYOTZINGO 150250020 SANTA CATARINA YECAHUITZOTL 090110026 SANTA CRUZ 151220005 SANTA CRUZ AYOTUZCO 150370024 SANTA MARIA MAGDALENA CAHUACAN 150600004 SANTA MARIA MAZATLA 150460005 SANTA MARIA TONANITLA 150440002 SANTIAGO CUAUTLALPAN 150950026 SANTIAGO YANCUITLALPAN 150370025 SAYAVEDRA (FINCAS DE SAYAVEDRA) 150130108 TECAMAC DE FELIPE VILLANUEVA 150810001 TEMAMATLA 150830001 TENOPALCO (SAN FRANCISCO TENOPALCO) 150530005 TEPEPAN 090130131 TEPOJACO 151210067 TEPOTZOTLAN 150950001 TLACHIULTEPEC DE AHUAYUCAN (LAS MALVINAS) 090130137 TLAHUAC 090110001 TLALNEPANTLA 151040001 TLALPAN 090120001 TLAZALA DE FABELA 150380001 TRANSFIGURACION 150600025 TULTEPEC 151080001 TULTITLAN DE MARIANO ESCOBEDO 151090001 VENUSTIANO CARRANZA 090170001 VILLA ALPINA 150570149 VILLA MILPA ALTA 090090001 VILLA NICOLAS ROMERO 150600001 VISITACION 150530028 XICO 151220001 XOCHIMILCO 090130001 ZACAMULPA 150370026 ZOQUIAPAN 150390017

Companies providing phone service in the area code: 53 Company ALESTRA ALTÁN ALTATA AT&T AT&T AT&T AVANTEL AXTEL BESTPHONE BRIHMCA CABLECOM CABLEMAS CABLEVISION COMUNICALO CONVERGIA DIALOGA EJA FREEDOMPOP GPO HIDALGUENSE IBO CELL IENTC INBTEL INTERFIBRA IP MATRIX KIWI NETWORKS LANTOINTERNET LOGITEL MARCATELCOM MAXCOM MCM MEGA TEL MEGACABLE METRORED MOVISTAR NEUS OPENIP PROTEL I-NEXT QBOCEL QUALTEL SERVITRON SERVNET TACTIC TALKTEL TELCEL TELECOMMERCE TELECOMUNICACIONES 360 TELEFACIL TELMEX TOTAL PLAY TV REY UC TELECOM VADSA VPN

Local Number: 7 Digits From To a Landline To a Cell Phone (Caller paid CPP) To a Cell Phone (Receiver paid MPP) Landline (Local dialing) 55 + 8 digits 044 + 55 + 8 digits 55 + 8 digits Cell (Local dialing) 55 + 8 digits 55 + 8 digits 55 + 8 digits Landline (Long distance) 01 + 55 + 8 digits 045 + 55 + 8 digits 01 + 55 + 8 digits Cell (Long distance) 01 + 55 + 8 digits 045 + 55 + 8 digits 01 + 55 + 8 digits

International dialing: +52 + 55 + 8 digits

References