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 [1] 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