Margosatubig comprises 17 barangays with an estimated population of 31,498. 16 of its barangays (94%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Balintawak | 1,055 | 0 | Dead zone: no towers from any source |
| Bularong | 1,408 | 0 | Dead zone: no towers from any source |
| Digon | 1,336 | 0 | Dead zone: no towers from any source |
| Guinimanan | 683 | 0 | Dead zone: no towers from any source |
| Igat Island | 1,216 | 0 | Dead zone: no towers from any source |
| Josefina | 819 | 0 | Dead zone: no towers from any source |
| Kalian | 1,914 | 0 | Dead zone: no towers from any source |
| Kolot | 303 | 0 | Dead zone: no towers from any source |
| Limamawan | 2,078 | 0 | Dead zone: no towers from any source |
| Limbatong | 1,376 | 0 | Dead zone: no towers from any source |
| Lumbog | 2,488 | 0 | Dead zone: no towers from any source |
| Magahis | 311 | 0 | Dead zone: no towers from any source |
| Poblacion | 11,169 | 5 | Crowdsourced signal only (no registered tower) |
| Sagua | 836 | 0 | Dead zone: no towers from any source |
| Talanusa | 765 | 0 | Dead zone: no towers from any source |
| Tiguian | 2,404 | 0 | Dead zone: no towers from any source |
| Tulapok | 1,337 | 0 | Dead zone: no towers from any source |