La serie son los 4 número siguiente a la lada, los cuales se utilizan para identificar la compañia y el asentamiento al que pertenece el número telefónico.
| Serie | Tipo | Compañia | Municipio | Estado | Asentamiento |
|---|---|---|---|---|---|
| 213 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 214 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 215 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 216 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 217 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 218 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 219 | Fijo | MEGACABLE | San José Iturbide | Guanajuato | San jose iturbide |
| 219 | Movil | MEGACABLE | Colón | Querétaro | Colon |
| 219 | Movil | MEGACABLE | Doctor Mora | Guanajuato | Doctor mora |
| 219 | Movil | MEGACABLE | San José Iturbide | Guanajuato | San jose iturbide |
| 219 | Movil | MEGACABLE | Colón | Querétaro | Galeras |
| 219 | Fijo | MEGACABLE | San José Iturbide | Guanajuato | San jose iturbide |
| 220 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 220 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 221 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 222 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 223 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 224 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 225 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 226 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 227 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 228 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 229 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 230 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 231 | Fijo | INBTEL | Colón | Querétaro | Blanco, el |
| 232 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 232 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 233 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | Tierra Blanca | Guanajuato | Tierra blanca |
| 234 | Fijo | TELMEX | Tierra Blanca | Guanajuato | Tierra blanca |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | Colón | Querétaro | Colon |
| 234 | Fijo | TELMEX | Colón | Querétaro | Colon |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 234 | Fijo | TELMEX | Colón | Querétaro | Ajuchitlan |
| 234 | Fijo | TELMEX | Colón | Querétaro | Ajuchitlan |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | Capulin, el |
| 234 | Fijo | TELMEX | San José Iturbide | Guanajuato | Capulin, el |
| 235 | Fijo | TELMEX | San José Iturbide | Guanajuato | San jose iturbide |
| 236 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 237 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 238 | Fijo | MAGD | San José Iturbide | Guanajuato | San jose iturbide |
| 239 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 239 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 240 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 241 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 242 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 243 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 244 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 245 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 246 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 247 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 248 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 249 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 250 | Movil | CORPORACIÓN NOVAVISIÓN | Doctor Mora | Guanajuato | Doctor mora |
| 251 | Movil | ALTÁN | San José Iturbide | Guanajuato | San jose iturbide |
| 251 | Movil | ALTÁN | San José Iturbide | Guanajuato | San jose iturbide |
| 252 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 253 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 253 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 254 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 255 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 255 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 256 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 257 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 258 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 259 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 260 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 260 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 261 | Fijo | OPERBES | San José Iturbide | Guanajuato | San jose iturbide |
| 262 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 263 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 264 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 265 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 266 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 267 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 268 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 269 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 269 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 270 | Movil | TELCEL | San José Iturbide | Guanajuato | San jose iturbide |
| 271 | Fijo | CONVERGIA | San José Iturbide | Guanajuato | San jose iturbide |
| 272 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 273 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 274 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |
| 275 | Movil | AT&T | San José Iturbide | Guanajuato | San jose iturbide |