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 |
|---|---|---|---|---|---|
| 636 | Fijo | OPENIP | Mexicali | Baja California | Mexicali |
| 636 | Fijo | OPENIP | Mexicali | Baja California | San felipe |
| 636 | Fijo | OPENIP | Mexicali | Baja California | Mexicali |
| 636 | Fijo | OPENIP | Mexicali | Baja California | San felipe |
| 637 | Movil | CABLEVISIONRED | Mexicali | Baja California | Mexicali |
| 637 | Movil | CABLEVISIONRED | Mexicali | Baja California | Mexicali |
| 638 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 639 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 640 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 641 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 642 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 643 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 644 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 644 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 645 | Movil | VADSA | Mexicali | Baja California | Mexicali |
| 645 | Fijo | VADSA | Mexicali | Baja California | Mexicali |
| 646 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 646 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 647 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 647 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 648 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 649 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 650 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 651 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 652 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 653 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 654 | Movil | TELCEL | Mexicali | Baja California | Mexicali |
| 655 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 656 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 656 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 657 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 657 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 658 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 659 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 660 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 661 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 661 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 662 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 662 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 663 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 664 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 665 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 665 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 666 | Movil | ABIX | Mexicali | Baja California | Mexicali |
| 667 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 668 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 669 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 670 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 671 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 671 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 672 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 673 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 673 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 674 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 675 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 676 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 677 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 678 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 678 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 679 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 680 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 680 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 681 | Fijo | TELIGENTIA | Mexicali | Baja California | Mexicali |
| 682 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 683 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 684 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 685 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 686 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 687 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 688 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 688 | Fijo | TELNOR | Mexicali | Baja California | Nayarit llamada |
| 689 | Fijo | TELNOR | Mexicali | Baja California | San felipe |
| 690 | Fijo | MEGACABLE | Mexicali | Baja California | Mexicali |
| 691 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 692 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 693 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 694 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 695 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 695 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 696 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 696 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 697 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 697 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 698 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 698 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 699 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 700 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 701 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 701 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 702 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 702 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 703 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 703 | Fijo | TOTAL PLAY | Mexicali | Baja California | Mexicali |
| 704 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 705 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 706 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 706 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 707 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 708 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 709 | Movil | TELCEL | Mexicali | Baja California | Mexicali |