Sibunag comprises 14 barangays with an estimated population of 23,474. 12 of its barangays (86%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alegria | 1,503 | 0 | Dead zone: no towers from any source |
| Ayangan | 2,346 | 0 | Dead zone: no towers from any source |
| Bubog | 759 | 0 | Dead zone: no towers from any source |
| Concordia Norte | 567 | 1 | Crowdsourced signal only (no registered tower) |
| Dasal | 2,795 | 0 | Dead zone: no towers from any source |
| Inampologan | 235 | 0 | Dead zone: no towers from any source |
| Maabay | 2,960 | 0 | Dead zone: no towers from any source |
| Millan | 2,231 | 0 | Dead zone: no towers from any source |
| Oracon Norte | 1,881 | 0 | Dead zone: no towers from any source |
| Ravina | 2,039 | 3 | Crowdsourced signal only (no registered tower) |
| Sabang | 2,121 | 0 | Dead zone: no towers from any source |
| San Isidro | 1,287 | 0 | Dead zone: no towers from any source |
| Sebaste | 1,604 | 0 | Dead zone: no towers from any source |
| Tanglad | 1,146 | 0 | Dead zone: no towers from any source |