Maasim comprises 16 barangays with an estimated population of 64,470. 11 of its barangays (69%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Amsipit | 4,511 | 0 | Dead zone: no towers from any source |
| Bales | 732 | 0 | Dead zone: no towers from any source |
| Colon | 1,545 | 0 | Dead zone: no towers from any source |
| Daliao | 2,438 | 2 | Crowdsourced signal only (no registered tower) |
| Kabatiol | 715 | 0 | Dead zone: no towers from any source |
| Kablacan | 4,164 | 0 | Dead zone: no towers from any source |
| Kamanga | 10,746 | 6 | Crowdsourced signal only (no registered tower) |
| Kanalo | 4,951 | 0 | Dead zone: no towers from any source |
| Lumasal | 2,812 | 0 | Dead zone: no towers from any source |
| Lumatil | 4,197 | 0 | Dead zone: no towers from any source |
| Malbang | 3,711 | 6 | Crowdsourced signal only (no registered tower) |
| Nomoh | 3,097 | 0 | Dead zone: no towers from any source |
| Pananag | 3,860 | 0 | Dead zone: no towers from any source |
| Poblacion (Maasim) | 1,211 | 1 | Crowdsourced signal only (no registered tower) |
| Seven Hills | 9,154 | 0 | Dead zone: no towers from any source |
| Tinoto | 6,626 | 7 | Crowdsourced signal only (no registered tower) |