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 |
|---|---|---|---|---|---|
| 776 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 776 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 777 | Fijo | FLYNODE | Mexicali | Baja California | Mexicali |
| 778 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 779 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 779 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 780 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 781 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 782 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 783 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 784 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 785 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 785 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 786 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 786 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 786 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 787 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 787 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 788 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 789 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 790 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 791 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 792 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 792 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 793 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 794 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 795 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 796 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 797 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 798 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 799 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 800 | Fijo | ALESTRA | Mexicali | Baja California | Mexicali |
| 801 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 801 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 802 | Fijo | TELECOMMERCE | Mexicali | Baja California | Mexicali |
| 803 | Fijo | ARDO | Mexicali | Baja California | Mexicali |
| 804 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 804 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 804 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 804 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 805 | Fijo | MEGACABLE | Mexicali | Baja California | Mexicali |
| 806 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 807 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 808 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 808 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 809 | Movil | YONDER | Mexicali | Baja California | Mexicali |
| 810 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 810 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 811 | Movil | OXIO | Mexicali | Baja California | Mexicali |
| 812 | Fijo | MEGACABLE | Mexicali | Baja California | Mexicali |
| 813 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 813 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 814 | Movil | TALENTO NET | Mexicali | Baja California | Mexicali |
| 815 | Fijo | MEGACABLE | Mexicali | Baja California | Mexicali |
| 816 | Fijo | IMPULSORA BALDER | Mexicali | Baja California | Mexicali |
| 817 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 818 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 819 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 820 | Fijo | ROBOT | Mexicali | Baja California | Mexicali |
| 820 | Fijo | ROBOT | Mexicali | Baja California | San felipe |
| 821 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 822 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 823 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 824 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 825 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 826 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 827 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 828 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 829 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 830 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 831 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 832 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 833 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 834 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 834 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 835 | Movil | VIRGIN | Mexicali | Baja California | Mexicali |
| 836 | Movil | FREEDOMPOP | Mexicali | Baja California | Mexicali |
| 837 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 838 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 839 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 840 | Movil | AT&T | Mexicali | Baja California | Mexicali |
| 841 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 842 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 843 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 844 | Fijo | TELNOR | Mexicali | Baja California | Mexicali |
| 845 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 846 | Fijo | CABLEMAS | Mexicali | Baja California | Mexicali |
| 847 | Fijo | JAPIFON | Mexicali | Baja California | Mexicali |
| 848 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |
| 849 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 850 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 851 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 852 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 853 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 854 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 855 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 856 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 857 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 858 | Movil | ALTÁN | Mexicali | Baja California | Mexicali |
| 859 | Fijo | SPARKTELECOMM | Mexicali | Baja California | Mexicali |