Calubian comprises 53 barangays with an estimated population of 21,780. 50 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 |
|---|---|---|---|
| Abanilla | 511 | 1 | Crowdsourced signal only (no registered tower) |
| Agas | 198 | 0 | Dead zone: no towers from any source |
| Anislagan | 238 | 0 | Dead zone: no towers from any source |
| Bunacan | 2 | 0 | Dead zone: no towers from any source |
| Cabalhin | 579 | 0 | Dead zone: no towers from any source |
| Cabalquinto | 949 | 0 | Dead zone: no towers from any source |
| Cabradilla | 749 | 0 | Dead zone: no towers from any source |
| Caneja | 189 | 0 | Dead zone: no towers from any source |
| Cantonghao | 445 | 0 | Dead zone: no towers from any source |
| Caroyocan | 450 | 0 | Dead zone: no towers from any source |
| Casiongan | 277 | 0 | Dead zone: no towers from any source |
| Cristina | 756 | 0 | Dead zone: no towers from any source |
| Dalumpines | 123 | 0 | Dead zone: no towers from any source |
| Don Luis | 252 | 0 | Dead zone: no towers from any source |
| Dulao | 178 | 0 | Dead zone: no towers from any source |
| Efe | 313 | 0 | Dead zone: no towers from any source |
| Enage | 543 | 0 | Dead zone: no towers from any source |
| Espinosa | 290 | 0 | Dead zone: no towers from any source |
| Ferdinand E. Marcos | 586 | 0 | Dead zone: no towers from any source |
| Garganera | 97 | 0 | Dead zone: no towers from any source |
| Garrido | 432 | 0 | Dead zone: no towers from any source |
| Guadalupe (Guadalupe Mendoza) | 872 | 0 | Dead zone: no towers from any source |
| Gutosan | 582 | 0 | Dead zone: no towers from any source |
| Igang | 357 | 0 | Dead zone: no towers from any source |
| Inalad | 661 | 0 | Dead zone: no towers from any source |
| Jubay | 650 | 0 | Dead zone: no towers from any source |
| Juson | 259 | 0 | Dead zone: no towers from any source |
| Kawayan Bogtong | 293 | 0 | Dead zone: no towers from any source |
| Kawayanan | 295 | 0 | Dead zone: no towers from any source |
| Kokoy Romualdez | 800 | 0 | Dead zone: no towers from any source |
| Labtic | 405 | 0 | Dead zone: no towers from any source |
| Laray | 571 | 0 | Dead zone: no towers from any source |
| M. Veloso | 303 | 1 | Crowdsourced signal only (no registered tower) |
| Mahait | 283 | 0 | Dead zone: no towers from any source |
| Malobago | 432 | 0 | Dead zone: no towers from any source |
| Matagok | 434 | 0 | Dead zone: no towers from any source |
| Nipa | 82 | 1 | Crowdsourced signal only (no registered tower) |
| Obispo | 453 | 0 | Dead zone: no towers from any source |
| Padoga | 419 | 0 | Dead zone: no towers from any source |
| Pagatpat | 28 | 0 | Dead zone: no towers from any source |
| Pangpang | 98 | 0 | Dead zone: no towers from any source |
| Patag | 469 | 0 | Dead zone: no towers from any source |
| Pates | 669 | 0 | Dead zone: no towers from any source |
| Paula | 268 | 0 | Dead zone: no towers from any source |
| Petrolio | 546 | 0 | Dead zone: no towers from any source |
| Poblacion | 31 | 0 | Dead zone: no towers from any source |
| Railes | 220 | 0 | Dead zone: no towers from any source |
| Tabla | 31 | 0 | Dead zone: no towers from any source |
| Tagharigue | 874 | 0 | Dead zone: no towers from any source |
| Tuburan | 336 | 0 | Dead zone: no towers from any source |
| Villahermosa | 528 | 0 | Dead zone: no towers from any source |
| Villalon | 696 | 0 | Dead zone: no towers from any source |
| Villanueva | 678 | 0 | Dead zone: no towers from any source |