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 |
|---|---|---|---|---|---|
| 269 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 269 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Lomas del real |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Lomas del real |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Lomas del real |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Carrillo puerto |
| 270 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 271 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 272 | Movil | AT&T | Ciudad Madero | Tamaulipas | Ciudad madero |
| 273 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 274 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 275 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 276 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 277 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 278 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Cd. cuauhtemoc |
| 278 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Cd. cuauhtemoc |
| 278 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Cd. cuauhtemoc |
| 278 | Fijo | TELMEX | Tampico Alto | Veracruz de Ignacio de la Llave | Tampico alto |
| 278 | Fijo | TELMEX | Tampico Alto | Veracruz de Ignacio de la Llave | Tampico alto |
| 278 | Fijo | TELMEX | Tampico Alto | Veracruz de Ignacio de la Llave | Tampico alto |
| 278 | Fijo | TELMEX | Tampico Alto | Veracruz de Ignacio de la Llave | Kilometro 100 |
| 279 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 280 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 281 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 282 | Fijo | AVANTEL | Tampico | Tamaulipas | Tampico |
| 283 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 284 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 285 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 286 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 287 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 288 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 289 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 290 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 291 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 292 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 293 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 294 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 295 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 296 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 297 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 298 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 299 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 300 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 301 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 302 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 303 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 304 | Fijo | AXTEL | Tampico | Tamaulipas | Tampico |
| 305 | Fijo | AXTEL | Tampico | Tamaulipas | Tampico |
| 306 | Fijo | AXTEL | Tampico | Tamaulipas | Tampico |
| 307 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 307 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 307 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 308 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 309 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 310 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 311 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 312 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 313 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 314 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 314 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 315 | Movil | AT&T | Ciudad Madero | Tamaulipas | Ciudad madero |
| 316 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 317 | Fijo | MAXCOM | Tampico | Tamaulipas | Tampico |
| 318 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 319 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 320 | Movil | AT&T | Ciudad Madero | Tamaulipas | Ciudad madero |
| 321 | Movil | AT&T | Ciudad Madero | Tamaulipas | Ciudad madero |
| 322 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 323 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 324 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 325 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 326 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 327 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 328 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 329 | Fijo | PROTEL I-NEXT | Tampico | Tamaulipas | Tampico |
| 330 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 331 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 332 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 333 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 334 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 334 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 334 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 334 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 334 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 335 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 336 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 337 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 338 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 339 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 340 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 341 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 342 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 343 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 344 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |