Tangcal comprises 18 barangays with an estimated population of 25,440. 18 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bayabao | 428 | 0 | Dead zone: no towers from any source |
| Berwar | 3,529 | 0 | Dead zone: no towers from any source |
| Big Banilisan | 491 | 0 | Dead zone: no towers from any source |
| Big Meladoc | 343 | 0 | Dead zone: no towers from any source |
| Bubong | 456 | 0 | Dead zone: no towers from any source |
| Lamaosa | 131 | 0 | Dead zone: no towers from any source |
| Linao | 1,073 | 0 | Dead zone: no towers from any source |
| Lindongan | 439 | 0 | Dead zone: no towers from any source |
| Lingco-an | 704 | 0 | Dead zone: no towers from any source |
| Papan | 473 | 0 | Dead zone: no towers from any source |
| Pelingkingan | 8,893 | 0 | Dead zone: no towers from any source |
| Poblacion | 2,249 | 0 | Dead zone: no towers from any source |
| Poona Kapatagan | 329 | 0 | Dead zone: no towers from any source |
| Punod | 2,308 | 0 | Dead zone: no towers from any source |
| Small Banisilon | 1,634 | 0 | Dead zone: no towers from any source |
| Small Meladoc | 638 | 0 | Dead zone: no towers from any source |
| Somiorang | 911 | 0 | Dead zone: no towers from any source |
| Tangcal Proper | 411 | 0 | Dead zone: no towers from any source |