Oas comprises 53 barangays with an estimated population of 68,267. 42 of its barangays (79%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Badbad | 583 | 0 | Dead zone: no towers from any source |
| Badian | 2,787 | 0 | Dead zone: no towers from any source |
| Bagsa | 1,480 | 3 | Crowdsourced signal only (no registered tower) |
| Bagumbayan | 2,505 | 1 | Crowdsourced signal only (no registered tower) |
| Balogo | 6,775 | 0 | Dead zone: no towers from any source |
| Banao | 366 | 0 | Dead zone: no towers from any source |
| Bangiawon | 305 | 0 | Dead zone: no towers from any source |
| Bogtong | 415 | 0 | Dead zone: no towers from any source |
| Bongoran | 712 | 0 | Dead zone: no towers from any source |
| Busac | 2,699 | 0 | Dead zone: no towers from any source |
| Cadawag | 515 | 0 | Dead zone: no towers from any source |
| Cagmanaba | 2,943 | 0 | Dead zone: no towers from any source |
| Calaguimit | 1,640 | 0 | Dead zone: no towers from any source |
| Calpi | 634 | 0 | Dead zone: no towers from any source |
| Calzada | 1,383 | 5 | Crowdsourced signal only (no registered tower) |
| Camagong | 1,358 | 0 | Dead zone: no towers from any source |
| Casinagan | 695 | 0 | Dead zone: no towers from any source |
| Centro Poblacion | 13 | 0 | Dead zone: no towers from any source |
| Coliat | 344 | 0 | Dead zone: no towers from any source |
| Del Rosario | 275 | 0 | Dead zone: no towers from any source |
| Gumabao | 1,047 | 0 | Dead zone: no towers from any source |
| Ilaor Norte | 954 | 2 | Crowdsourced signal only (no registered tower) |
| Ilaor Sur | 617 | 8 | Crowdsourced signal only (no registered tower) |
| Iraya Norte | 749 | 12 | Crowdsourced signal only (no registered tower) |
| Iraya Sur | 138 | 0 | Dead zone: no towers from any source |
| Manga | 3,010 | 0 | Dead zone: no towers from any source |
| Maporong | 1,129 | 0 | Dead zone: no towers from any source |
| Maramba | 2,982 | 0 | Dead zone: no towers from any source |
| Matambo | 1,074 | 0 | Dead zone: no towers from any source |
| Mayag | 566 | 0 | Dead zone: no towers from any source |
| Mayao | 2,498 | 0 | Dead zone: no towers from any source |
| Moroponros | 281 | 0 | Dead zone: no towers from any source |
| Nagas | 1,694 | 1 | Crowdsourced signal only (no registered tower) |
| Obaliw-Rinas | 449 | 0 | Dead zone: no towers from any source |
| Pistola | 1,021 | 1 | Crowdsourced signal only (no registered tower) |
| Ramay | 390 | 0 | Dead zone: no towers from any source |
| Rizal | 306 | 3 | Crowdsourced signal only (no registered tower) |
| Saban | 2,890 | 0 | Dead zone: no towers from any source |
| San Agustin | 2,824 | 1 | Crowdsourced signal only (no registered tower) |
| San Antonio | 1,151 | 0 | Dead zone: no towers from any source |
| San Isidro | 832 | 0 | Dead zone: no towers from any source |
| San Jose | 545 | 0 | Dead zone: no towers from any source |
| San Juan | 1,473 | 0 | Dead zone: no towers from any source |
| San Miguel | 716 | 0 | Dead zone: no towers from any source |
| San Pascual (Nale) | 656 | 0 | Dead zone: no towers from any source |
| San Ramon | 1,779 | 0 | Dead zone: no towers from any source |
| San Vicente (Suca) | 1,578 | 0 | Dead zone: no towers from any source |
| Tablon | 648 | 0 | Dead zone: no towers from any source |
| Talisay | 818 | 0 | Dead zone: no towers from any source |
| Talongog | 579 | 0 | Dead zone: no towers from any source |
| Tapel | 697 | 0 | Dead zone: no towers from any source |
| Tobgon | 2,770 | 0 | Dead zone: no towers from any source |
| Tobog | 979 | 1 | Crowdsourced signal only (no registered tower) |