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 |
|---|---|---|---|---|---|
| 243 | Movil | AT&T | Tecate | Baja California | Tecate |
| 244 | Movil | AT&T | Tecate | Baja California | Tecate |
| 244 | Movil | AT&T | Tecate | Baja California | Tecate |
| 245 | Movil | AT&T | Tecate | Baja California | Tecate |
| 246 | Movil | AT&T | Tecate | Baja California | Tecate |
| 247 | Movil | AT&T | Tecate | Baja California | Tecate |
| 248 | Movil | AT&T | Tecate | Baja California | Tecate |
| 249 | Movil | AT&T | Tecate | Baja California | Tecate |
| 249 | Movil | AT&T | Tecate | Baja California | Tecate |
| 250 | Movil | ALTÁN | Tecate | Baja California | Tecate |
| 251 | Movil | AT&T | Tecate | Baja California | Tecate |
| 252 | Movil | AT&T | Tecate | Baja California | Tecate |
| 253 | Movil | AT&T | Tecate | Baja California | Tecate |
| 254 | Movil | AT&T | Tecate | Baja California | Tecate |
| 255 | Movil | AT&T | Tecate | Baja California | Tecate |
| 256 | Movil | AT&T | Tecate | Baja California | Tecate |
| 257 | Movil | AT&T | Tecate | Baja California | Tecate |
| 258 | Movil | AT&T | Tecate | Baja California | Tecate |
| 259 | Movil | AT&T | Tecate | Baja California | Tecate |
| 260 | Movil | TELCEL | Tecate | Baja California | Tecate |
| 261 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 261 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 261 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 262 | Movil | AT&T | Tecate | Baja California | Tecate |
| 263 | Movil | AT&T | Tecate | Baja California | Tecate |
| 264 | Movil | AT&T | Tecate | Baja California | Tecate |
| 265 | Movil | AT&T | Tecate | Baja California | Tecate |
| 266 | Movil | AT&T | Tecate | Baja California | Tecate |
| 267 | Movil | AT&T | Tecate | Baja California | Tecate |
| 268 | Movil | AT&T | Tecate | Baja California | Tecate |
| 269 | Movil | AT&T | Tecate | Baja California | Tecate |
| 270 | Fijo | CENTERNEXT | Tecate | Baja California | Tecate |
| 271 | Movil | AT&T | Tecate | Baja California | Tecate |
| 272 | Movil | AT&T | Tecate | Baja California | Tecate |
| 273 | Movil | AT&T | Tecate | Baja California | Tecate |
| 274 | Movil | AT&T | Tecate | Baja California | Tecate |
| 275 | Movil | AT&T | Tecate | Baja California | Tecate |
| 276 | Movil | AT&T | Tecate | Baja California | Tecate |
| 277 | Movil | AT&T | Tecate | Baja California | Tecate |
| 278 | Movil | AT&T | Tecate | Baja California | Tecate |
| 279 | Movil | AT&T | Tecate | Baja California | Tecate |
| 280 | Movil | AT&T | Tecate | Baja California | Tecate |
| 281 | Movil | AT&T | Tecate | Baja California | Tecate |
| 282 | Fijo | INBTEL | Tecate | Baja California | Tecate |
| 283 | Movil | AT&T | Tecate | Baja California | Tecate |
| 284 | Movil | AT&T | Tecate | Baja California | Tecate |
| 285 | Movil | AT&T | Tecate | Baja California | Tecate |
| 285 | Movil | AT&T | Tecate | Baja California | Tecate |
| 286 | Movil | AT&T | Tecate | Baja California | Tecate |
| 287 | Movil | CABLEVISIONRED | Tecate | Baja California | Tecate |
| 288 | Movil | AT&T | Tecate | Baja California | Tecate |
| 289 | Movil | AT&T | Tecate | Baja California | Tecate |
| 290 | Movil | AT&T | Tecate | Baja California | Tecate |
| 291 | Movil | AT&T | Tecate | Baja California | Tecate |
| 292 | Movil | AT&T | Tecate | Baja California | Tecate |
| 293 | Movil | AT&T | Tecate | Baja California | Tecate |
| 294 | Movil | AT&T | Tecate | Baja California | Tecate |
| 295 | Movil | AT&T | Tecate | Baja California | Tecate |
| 296 | Movil | AT&T | Tecate | Baja California | Tecate |
| 297 | Movil | AT&T | Tecate | Baja California | Tecate |
| 297 | Movil | AT&T | Tecate | Baja California | Tecate |
| 298 | Movil | AT&T | Tecate | Baja California | Tecate |
| 299 | Movil | CORPORACIÓN NOVAVISIÓN | Tecate | Baja California | Tecate |
| 300 | Fijo | TOTAL PLAY | Tecate | Baja California | Tecate |
| 300 | Fijo | TOTAL PLAY | Tecate | Baja California | Tecate |
| 301 | Movil | AT&T | Tecate | Baja California | Tecate |
| 302 | Movil | AT&T | Tecate | Baja California | Tecate |
| 302 | Movil | AT&T | Tecate | Baja California | Tecate |
| 303 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 303 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 303 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 304 | Movil | AT&T | Tecate | Baja California | Tecate |
| 305 | Movil | AT&T | Tecate | Baja California | Tecate |
| 305 | Movil | AT&T | Tecate | Baja California | Tecate |
| 306 | Movil | AT&T | Tecate | Baja California | Tecate |
| 307 | Movil | AT&T | Tecate | Baja California | Tecate |
| 308 | Movil | AT&T | Tecate | Baja California | Tecate |
| 309 | Movil | AT&T | Tecate | Baja California | Tecate |
| 310 | Movil | AT&T | Tecate | Baja California | Tecate |
| 310 | Movil | AT&T | Tecate | Baja California | Tecate |
| 311 | Movil | AT&T | Tecate | Baja California | Tecate |
| 312 | Movil | AT&T | Tecate | Baja California | Tecate |
| 313 | Movil | AT&T | Tecate | Baja California | Tecate |
| 314 | Movil | AT&T | Tecate | Baja California | Tecate |
| 315 | Movil | AT&T | Tecate | Baja California | Tecate |
| 316 | Movil | AT&T | Tecate | Baja California | Tecate |
| 317 | Movil | AT&T | Tecate | Baja California | Tecate |
| 317 | Movil | AT&T | Tecate | Baja California | Tecate |
| 318 | Movil | YONDER | Tecate | Baja California | Tecate |
| 319 | Fijo | CABLEMAS | Tecate | Baja California | Tecate |
| 320 | Fijo | TELECOMMERCE | Tecate | Baja California | Tecate |
| 321 | Movil | TALENTO NET | Tecate | Baja California | Tecate |
| 322 | Fijo | NGX NETWORKS | Tecate | Baja California | Tecate |
| 323 | Movil | FREEDOMPOP | Tecate | Baja California | Tecate |
| 324 | Movil | AT&T | Tecate | Baja California | Tecate |
| 325 | Movil | AT&T | Tecate | Baja California | Tecate |
| 326 | Movil | AT&T | Tecate | Baja California | Tecate |
| 327 | Movil | AT&T | Tecate | Baja California | Tecate |
| 328 | Movil | AT&T | Tecate | Baja California | Tecate |
| 329 | Movil | AT&T | Tecate | Baja California | Tecate |