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 |
|---|---|---|---|---|---|
| 344 | Fijo | TELMEX | Metepec | México | Metepec |
| 344 | Fijo | TELMEX | Metepec | México | Metepec |
| 344 | Fijo | TELMEX | Metepec | México | Santa maria magdalena ocotitlan |
| 344 | Fijo | TELMEX | Metepec | México | Santa maria magdalena ocotitlan |
| 344 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 345 | Fijo | TELMEX | Calimaya | México | San marcos de la cruz |
| 345 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 346 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 346 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 347 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 348 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 349 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 350 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 351 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 352 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 352 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 353 | Fijo | AVANTEL | Toluca | México | Toluca de lerdo |
| 353 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 353 | Fijo | TV REY | Toluca | México | Toluca de lerdo |
| 354 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 355 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 356 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 357 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 358 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 359 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 360 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 361 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 362 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 363 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 364 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 365 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 366 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 367 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 367 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 368 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 369 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 370 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 371 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 372 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 373 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 374 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 375 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 376 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 377 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 378 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 379 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 380 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 381 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 382 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 383 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 384 | Fijo | AXTEL | Toluca | México | Toluca de lerdo |
| 385 | Fijo | AXTEL | Toluca | México | Toluca de lerdo |
| 386 | Movil | AT&T | Toluca | México | Toluca de lerdo |
| 387 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 388 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 389 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 390 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 391 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 392 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 393 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 394 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 395 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 396 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 397 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 398 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 399 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 400 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 401 | Fijo | MAXCOM | Toluca | México | Toluca de lerdo |
| 402 | Fijo | TOTAL PLAY | Toluca | México | Toluca de lerdo |
| 403 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 404 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 405 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 406 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 407 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 408 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 409 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 410 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 411 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 412 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 413 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 414 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 415 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 416 | Fijo | MEGACABLE | Metepec | México | Metepec |
| 416 | Fijo | MEGACABLE | Toluca | México | Toluca de lerdo |
| 416 | Fijo | MEGACABLE | Zinacantepec | México | San miguel zinacantepec |
| 416 | Movil | MOVISTAR | Toluca | México | Toluca de lerdo |
| 417 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 418 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 419 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 420 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 420 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 421 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 422 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 423 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 424 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 425 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 426 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 427 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 428 | Movil | TELCEL | Toluca | México | Toluca de lerdo |
| 429 | Movil | TELCEL | Toluca | México | Toluca de lerdo |