Malabuyoc comprises 14 barangays with an estimated population of 17,635. 9 of its barangays (64%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Armeña (Cansilongan) | 534 | 2 | Crowdsourced signal only (no registered tower) |
| Barangay I (Pob.) | 785 | 0 | Dead zone: no towers from any source |
| Barangay II (Pob.) | 172 | 1 | Crowdsourced signal only (no registered tower) |
| Cerdeña (Ansan) | 2,104 | 0 | Dead zone: no towers from any source |
| Labrador (Bulod) | 851 | 0 | Dead zone: no towers from any source |
| Lombo | 1,560 | 0 | Dead zone: no towers from any source |
| Looc | 1,539 | 1 | Crowdsourced signal only (no registered tower) |
| Mahanlud | 824 | 1 | Crowdsourced signal only (no registered tower) |
| Mindanao (Pajo) | 1,155 | 0 | Dead zone: no towers from any source |
| Montañeza (Inamlang) | 2,298 | 6 | Crowdsourced signal only (no registered tower) |
| Salmeron (Bulak) | 1,064 | 0 | Dead zone: no towers from any source |
| Santo Niño | 1,939 | 0 | Dead zone: no towers from any source |
| Sorsogon (Balimaya) | 1,614 | 0 | Dead zone: no towers from any source |
| Tolosa (Calatagan) | 1,196 | 0 | Dead zone: no towers from any source |