Sinacaban comprises 17 barangays with an estimated population of 22,796. 15 of its barangays (88%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Cagay-anon | 1,546 | 0 | Dead zone: no towers from any source |
| Camanse | 2,010 | 0 | Dead zone: no towers from any source |
| Colupan Alto | 1,246 | 0 | Dead zone: no towers from any source |
| Colupan Bajo | 3,842 | 0 | Dead zone: no towers from any source |
| Dinas | 75 | 0 | Dead zone: no towers from any source |
| Estrella | 94 | 0 | Dead zone: no towers from any source |
| Katipunan | 96 | 0 | Dead zone: no towers from any source |
| Libertad Alto | 712 | 0 | Dead zone: no towers from any source |
| Libertad Bajo | 1,576 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion | 2,207 | 2 | Crowdsourced signal only (no registered tower) |
| San Isidro Alto | 149 | 0 | Dead zone: no towers from any source |
| San Isidro Bajo | 32 | 0 | Dead zone: no towers from any source |
| San Lorenzo Ruiz (Sungan) | 192 | 0 | Dead zone: no towers from any source |
| San Vicente | 2,672 | 0 | Dead zone: no towers from any source |
| Señor | 505 | 0 | Dead zone: no towers from any source |
| Sinonoc | 5,532 | 0 | Dead zone: no towers from any source |
| Tipan | 310 | 0 | Dead zone: no towers from any source |