Mamasapano comprises 14 barangays with an estimated population of 7,292. 12 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 |
|---|---|---|---|
| Bagumbong | 192 | 0 | Dead zone: no towers from any source |
| Dabenayan | 162 | 0 | Dead zone: no towers from any source |
| Daladap | 328 | 0 | Dead zone: no towers from any source |
| Dasikil | 174 | 0 | Dead zone: no towers from any source |
| Liab | 171 | 0 | Dead zone: no towers from any source |
| Libutan | 611 | 0 | Dead zone: no towers from any source |
| Lusay | 208 | 0 | Dead zone: no towers from any source |
| Mamasapano | 1,226 | 0 | Dead zone: no towers from any source |
| Manongkaling | 2,446 | 1 | Crowdsourced signal only (no registered tower) |
| Pidsandawan | 205 | 0 | Dead zone: no towers from any source |
| Pimbalakan | 234 | 0 | Dead zone: no towers from any source |
| Sapakan | 515 | 0 | Dead zone: no towers from any source |
| Tuka | 352 | 1 | Crowdsourced signal only (no registered tower) |
| Tukanalipao | 468 | 0 | Dead zone: no towers from any source |