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 |
|---|---|---|---|---|---|
| 330 | Movil | AT&T | Tecate | Baja California | Tecate |
| 331 | Movil | AT&T | Tecate | Baja California | Tecate |
| 332 | Movil | VIRGIN | Tecate | Baja California | Tecate |
| 333 | Fijo | TELECOMMERCE HOLDING | Tecate | Baja California | Tecate |
| 334 | Fijo | TELIGENTIA | Tecate | Baja California | Tecate |
| 391 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 392 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 392 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 393 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 515 | Fijo | AXTEL | Tecate | Baja California | Tecate |
| 521 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 593 | Movil | AT&T | Tecate | Baja California | Tecate |
| 593 | Movil | AT&T | Tecate | Baja California | Tecate |
| 652 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 652 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 652 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 652 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 653 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 654 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 654 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 654 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 654 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 655 | Fijo | TELNOR | Tecate | Baja California | Tecate |
| 656 | Movil | AT&T | Tecate | Baja California | Tecate |
| 656 | Movil | AT&T | Tecate | Baja California | Tecate |
| 657 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 657 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 690 | Fijo | MEGACABLE | Tecate | Baja California | Tecate |
| 799 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 799 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 799 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 799 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 845 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 845 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 851 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 888 | Movil | MOVISTAR | Tecate | Baja California | Tecate |
| 900 | Fijo | TELNOR | Tecate | Baja California | Tecate |