Tarangnan comprises 41 barangays with an estimated population of 19,212. 39 of its barangays (95%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alcazar | 150 | 0 | Dead zone: no towers from any source |
| Awang | 177 | 0 | Dead zone: no towers from any source |
| Bahay | 532 | 0 | Dead zone: no towers from any source |
| Balonga-as | 281 | 0 | Dead zone: no towers from any source |
| Balugo | 562 | 1 | Crowdsourced signal only (no registered tower) |
| Bangon Gote | 160 | 0 | Dead zone: no towers from any source |
| Baras | 132 | 0 | Dead zone: no towers from any source |
| Binalayan | 224 | 0 | Dead zone: no towers from any source |
| Bisitahan | 305 | 0 | Dead zone: no towers from any source |
| Bonga | 495 | 0 | Dead zone: no towers from any source |
| Cabunga-an | 835 | 0 | Dead zone: no towers from any source |
| Cagtutulo | 649 | 0 | Dead zone: no towers from any source |
| Cambatutay Nuevo | 214 | 0 | Dead zone: no towers from any source |
| Cambatutay Viejo | 191 | 0 | Dead zone: no towers from any source |
| Canunghan | 110 | 0 | Dead zone: no towers from any source |
| Catan-agan | 131 | 0 | Dead zone: no towers from any source |
| Dapdap | 770 | 0 | Dead zone: no towers from any source |
| Gallego | 232 | 0 | Dead zone: no towers from any source |
| Imelda Pob. (Posgo) | 687 | 0 | Dead zone: no towers from any source |
| Lahong | 216 | 0 | Dead zone: no towers from any source |
| Libucan Dacu | 1,010 | 0 | Dead zone: no towers from any source |
| Libucan Gote | 273 | 0 | Dead zone: no towers from any source |
| Lucerdoni (Irong-irong) | 258 | 0 | Dead zone: no towers from any source |
| Majacob | 740 | 0 | Dead zone: no towers from any source |
| Mancares | 1,096 | 0 | Dead zone: no towers from any source |
| Marabut | 213 | 0 | Dead zone: no towers from any source |
| Oeste - A | 674 | 0 | Dead zone: no towers from any source |
| Oeste - B | 333 | 0 | Dead zone: no towers from any source |
| Pajo | 343 | 0 | Dead zone: no towers from any source |
| Palencia | 776 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion A | 173 | 0 | Dead zone: no towers from any source |
| Poblacion B | 121 | 0 | Dead zone: no towers from any source |
| Poblacion C | 36 | 0 | Dead zone: no towers from any source |
| Poblacion D | 1,916 | 0 | Dead zone: no towers from any source |
| Poblacion E | 214 | 0 | Dead zone: no towers from any source |
| San Vicente | 662 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 636 | 0 | Dead zone: no towers from any source |
| Sugod | 367 | 0 | Dead zone: no towers from any source |
| Talinga | 590 | 0 | Dead zone: no towers from any source |
| Tigdaranao | 1,271 | 0 | Dead zone: no towers from any source |
| Tizon | 457 | 0 | Dead zone: no towers from any source |