Tagapul-an comprises 14 barangays with an estimated population of 4,651. 14 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 |
|---|---|---|---|
| Baguiw | 698 | 0 | Dead zone: no towers from any source |
| Balocawe | 470 | 0 | Dead zone: no towers from any source |
| Guinbarucan | 203 | 0 | Dead zone: no towers from any source |
| Labangbaybay | 344 | 0 | Dead zone: no towers from any source |
| Luna | 663 | 0 | Dead zone: no towers from any source |
| Mataluto | 327 | 0 | Dead zone: no towers from any source |
| Nipa | 360 | 0 | Dead zone: no towers from any source |
| Pantalan | 114 | 0 | Dead zone: no towers from any source |
| Pulangbato | 153 | 0 | Dead zone: no towers from any source |
| San Jose (Pob.) | 272 | 0 | Dead zone: no towers from any source |
| San Vicente | 398 | 0 | Dead zone: no towers from any source |
| Suarez (Manlangit) | 96 | 0 | Dead zone: no towers from any source |
| Sugod (Pob.) | 299 | 0 | Dead zone: no towers from any source |
| Trinidad | 254 | 0 | Dead zone: no towers from any source |