Tobias Fornier (Dao) comprises 50 barangays with an estimated population of 32,385. 43 of its barangays (86%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abaca | 1,551 | 0 | Dead zone: no towers from any source |
| Aras-Asan | 1,014 | 0 | Dead zone: no towers from any source |
| Arobo | 383 | 2 | Crowdsourced signal only (no registered tower) |
| Atabay | 372 | 2 | Crowdsourced signal only (no registered tower) |
| Atiotes | 321 | 0 | Dead zone: no towers from any source |
| Bagumbayan | 391 | 0 | Dead zone: no towers from any source |
| Balloscas | 550 | 0 | Dead zone: no towers from any source |
| Balud | 564 | 2 | Crowdsourced signal only (no registered tower) |
| Barasanan A | 360 | 0 | Dead zone: no towers from any source |
| Barasanan B | 448 | 0 | Dead zone: no towers from any source |
| Barasanan C | 432 | 0 | Dead zone: no towers from any source |
| Bariri | 342 | 0 | Dead zone: no towers from any source |
| Camandagan | 704 | 0 | Dead zone: no towers from any source |
| Cato-ogan | 845 | 0 | Dead zone: no towers from any source |
| Danawan | 294 | 0 | Dead zone: no towers from any source |
| Diclum | 598 | 0 | Dead zone: no towers from any source |
| Fatima | 1,358 | 3 | Crowdsourced signal only (no registered tower) |
| Gamad (Igdamacio) | 1,060 | 0 | Dead zone: no towers from any source |
| Igbalogo | 350 | 0 | Dead zone: no towers from any source |
| Igbangcal-A | 558 | 0 | Dead zone: no towers from any source |
| Igbangcal-B | 346 | 0 | Dead zone: no towers from any source |
| Igbangcal-C | 318 | 0 | Dead zone: no towers from any source |
| Igcabuad | 163 | 0 | Dead zone: no towers from any source |
| Igcadac | 253 | 0 | Dead zone: no towers from any source |
| Igcado | 1,368 | 0 | Dead zone: no towers from any source |
| Igcalawagan | 557 | 0 | Dead zone: no towers from any source |
| Igcapuyas | 267 | 0 | Dead zone: no towers from any source |
| Igcasicad (San Pedro) | 166 | 0 | Dead zone: no towers from any source |
| Igdalaguit | 958 | 0 | Dead zone: no towers from any source |
| Igdanlog | 822 | 0 | Dead zone: no towers from any source |
| Igdurarog | 178 | 0 | Dead zone: no towers from any source |
| Igtugas | 442 | 0 | Dead zone: no towers from any source |
| Lawigan | 237 | 0 | Dead zone: no towers from any source |
| Lindero | 166 | 0 | Dead zone: no towers from any source |
| Manaling (Cata-an) | 751 | 0 | Dead zone: no towers from any source |
| Masayo | 1,063 | 0 | Dead zone: no towers from any source |
| Nagsubuan | 751 | 0 | Dead zone: no towers from any source |
| Nasuli-A (San Ramon) | 1,260 | 0 | Dead zone: no towers from any source |
| Opsan (San Jose) | 828 | 0 | Dead zone: no towers from any source |
| Paciencia | 671 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion Norte | 1,679 | 11 | Crowdsourced signal only (no registered tower) |
| Poblacion Sur | 1,744 | 3 | Crowdsourced signal only (no registered tower) |
| Portillo | 331 | 0 | Dead zone: no towers from any source |
| Quezon | 549 | 0 | Dead zone: no towers from any source |
| Salamague (Santa Maria) | 506 | 0 | Dead zone: no towers from any source |
| Santo Tomas | 518 | 0 | Dead zone: no towers from any source |
| Tacbuyan | 214 | 0 | Dead zone: no towers from any source |
| Tene | 384 | 0 | Dead zone: no towers from any source |
| Villaflor | 1,469 | 0 | Dead zone: no towers from any source |
| Ysulat | 931 | 0 | Dead zone: no towers from any source |