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 |
|---|---|---|---|---|---|
| 223 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 223 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 223 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 224 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 224 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 224 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 224 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 224 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 224 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 225 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 226 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 226 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 226 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 226 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 226 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 227 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 227 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 227 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 227 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 227 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 228 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 229 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 229 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 230 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 231 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 232 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 233 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 234 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 235 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 235 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 236 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 237 | Fijo | AVANTEL | Tampico | Tamaulipas | Tampico |
| 238 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 239 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 240 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 241 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 242 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 243 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 243 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 243 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 244 | Movil | CELMAX | Tampico | Tamaulipas | Tampico |
| 244 | Fijo | MAXCOM | Tampico | Tamaulipas | Tampico |
| 244 | Movil | CELMAX | Tampico | Tamaulipas | Tampico |
| 244 | Movil | CELMAX | Tampico | Tamaulipas | Tampico |
| 245 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 245 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 246 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 247 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 248 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 249 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 250 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 251 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 252 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 252 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 253 | Movil | MOVISTAR | Tampico | Tamaulipas | Tampico |
| 254 | Movil | AT&T | Tampico | Tamaulipas | Tampico |
| 255 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 256 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 256 | Fijo | TELMEX | Tampico | Tamaulipas | Tampico |
| 256 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 257 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |
| 257 | Fijo | TELMEX | Chontla | Veracruz de Ignacio de la Llave | Magozal |
| 257 | Fijo | TELMEX | Chontla | Veracruz de Ignacio de la Llave | Magozal |
| 258 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 259 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 259 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 260 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 261 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 262 | Fijo | TELMEX | Pánuco | Veracruz de Ignacio de la Llave | Moralillo |
| 262 | Fijo | TELMEX | Pánuco | Veracruz de Ignacio de la Llave | Moralillo |
| 262 | Fijo | TELMEX | Pánuco | Veracruz de Ignacio de la Llave | Moralillo |
| 262 | Fijo | TELMEX | Pánuco | Veracruz de Ignacio de la Llave | Moralillo |
| 263 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 264 | Fijo | TELMEX | Altamira | Tamaulipas | Altamira |
| 265 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 266 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 267 | Movil | TELCEL | Tampico | Tamaulipas | Tampico |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Hidalgo |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Hidalgo |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Hidalgo |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Hidalgo |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Anahuac |
| 268 | Fijo | TELMEX | Pueblo Viejo | Veracruz de Ignacio de la Llave | Anahuac |
| 269 | Fijo | TELMEX | Ciudad Madero | Tamaulipas | Ciudad madero |