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 |
|---|---|---|---|---|---|
| 940 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 940 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 940 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 941 | Movil | TELCEL | Mazatlán | Sinaloa | Mazatlan |
| 942 | Movil | MOVISTAR | Mazatlán | Sinaloa | Mazatlan |
| 943 | Movil | MOVISTAR | Mazatlán | Sinaloa | Mazatlan |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Walamo, el |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Siqueros |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Puerta de canoas |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Vainillo, el |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Marmol de salcido (marmol) |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Marmol de salcido (marmol) |
| 952 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Escamillas |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Escamillas |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Habal, el |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Habal, el |
| 954 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 963 | Fijo | TELMEX | Mazatlán | Sinaloa | Roble, el |
| 963 | Fijo | TELMEX | Mazatlán | Sinaloa | Roble, el |
| 963 | Fijo | TELMEX | Mazatlán | Sinaloa | Roble, el |
| 963 | Fijo | TELMEX | Mazatlán | Sinaloa | Roble, el |
| 965 | Fijo | TELMEX | Mazatlán | Sinaloa | Quelite, el |
| 965 | Fijo | TELMEX | Mazatlán | Sinaloa | Quelite, el |
| 965 | Fijo | TELMEX | Mazatlán | Sinaloa | Quelite, el |
| 965 | Fijo | TELMEX | Mazatlán | Sinaloa | Quelite, el |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 967 | Fijo | TELMEX | Mazatlán | Sinaloa | Villa union |
| 968 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 980 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 980 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 980 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 980 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 980 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 981 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 981 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 981 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 981 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 981 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 982 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 982 | Fijo | TELMEX | Mazatlán | Sinaloa | Barron |
| 982 | Fijo | TELMEX | Mazatlán | Sinaloa | Barron |
| 983 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 984 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 985 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 985 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 985 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 985 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 986 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 987 | Movil | MOVISTAR | Mazatlán | Sinaloa | Mazatlan |
| 988 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 988 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 988 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 988 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 988 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 989 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 989 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 990 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 990 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 990 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 991 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 991 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 991 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 992 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 992 | Fijo | TELMEX | Mazatlán | Sinaloa | Mazatlan |
| 993 | Movil | TELCEL | Mazatlán | Sinaloa | Mazatlan |
| 994 | Movil | TELCEL | Mazatlán | Sinaloa | Mazatlan |
| 995 | Fijo | AJTEL | Mazatlán | Sinaloa | Mazatlan |