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 |
|---|---|---|---|---|---|
| 520 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 520 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 521 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 522 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 522 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 523 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 524 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 525 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 526 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 527 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 528 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 529 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 530 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 531 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 532 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 532 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 533 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 534 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 535 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 536 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 537 | Fijo | MCM | Reynosa | Tamaulipas | Reynosa |
| 537 | Fijo | MCM | Reynosa | Tamaulipas | Reynosa |
| 538 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 539 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 540 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 541 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 541 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 542 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 543 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 544 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 545 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 546 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 547 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 548 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 549 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 549 | Movil | TELCEL | Reynosa | Tamaulipas | Reynosa |
| 550 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 551 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 552 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 553 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 554 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 555 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 555 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 556 | Fijo | CLEARCOM | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 557 | Fijo | TELECOMMERCE | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 558 | Fijo | MBT | Reynosa | Tamaulipas | Reynosa |
| 559 | Fijo | BESTPHONE | Reynosa | Tamaulipas | Reynosa |
| 560 | Fijo | BESTPHONE | Reynosa | Tamaulipas | Reynosa |
| 561 | Fijo | BESTPHONE | Reynosa | Tamaulipas | Reynosa |
| 562 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 563 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 563 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 564 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 565 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 566 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 567 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 568 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 569 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 569 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 570 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 571 | Movil | ADDINTELI | Reynosa | Tamaulipas | Reynosa |
| 572 | Fijo | COEFICIENTE | Reynosa | Tamaulipas | Reynosa |
| 573 | Fijo | Reynosa | Tamaulipas | Reynosa | |
| 574 | Fijo | Reynosa | Tamaulipas | Reynosa | |
| 575 | Fijo | Reynosa | Tamaulipas | Reynosa | |
| 576 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 577 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 578 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 579 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 580 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 581 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 581 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 582 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 583 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 583 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 584 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 585 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 586 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 587 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 588 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 589 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 590 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 591 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 592 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 593 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 593 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 593 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 593 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 594 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 594 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 595 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 596 | Fijo | TELMEX | Reynosa | Tamaulipas | Reynosa |
| 597 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 597 | Movil | AT&T | Río Bravo | Tamaulipas | Ciudad rio bravo |
| 598 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 599 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 600 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 601 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 602 | Movil | AT&T | Reynosa | Tamaulipas | Reynosa |
| 603 | Movil | FREEDOMPOP | Río Bravo | Tamaulipas | Ciudad rio bravo |