Capul comprises 12 barangays with an estimated population of 14,219. 12 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 |
|---|---|---|---|
| Aguin | 1,016 | 0 | Dead zone: no towers from any source |
| Jubang | 401 | 0 | Dead zone: no towers from any source |
| Landusan | 1,137 | 0 | Dead zone: no towers from any source |
| Oson | 641 | 0 | Dead zone: no towers from any source |
| Poblacion Barangay 1 | 922 | 0 | Dead zone: no towers from any source |
| Poblacion Barangay 2 | 196 | 0 | Dead zone: no towers from any source |
| Poblacion Barangay 3 | 198 | 0 | Dead zone: no towers from any source |
| Poblacion Barangay 4 | 153 | 0 | Dead zone: no towers from any source |
| Poblacion Barangay 5 | 5,504 | 0 | Dead zone: no towers from any source |
| Sagaosawan | 422 | 0 | Dead zone: no towers from any source |
| San Luis | 1,948 | 0 | Dead zone: no towers from any source |
| Sawang | 1,681 | 0 | Dead zone: no towers from any source |