Guinsiliban comprises 7 barangays with an estimated population of 4,667. 5 of its barangays (71%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Butay | 335 | 0 | Dead zone: no towers from any source |
| Cabuan | 542 | 0 | Dead zone: no towers from any source |
| Cantaan | 226 | 0 | Dead zone: no towers from any source |
| Liong | 265 | 0 | Dead zone: no towers from any source |
| Maac | 1,057 | 1 | Crowdsourced signal only (no registered tower) |
| North Poblacion | 1,305 | 2 | Registered tower only (not crowd-verified) |
| South Poblacion | 937 | 0 | Dead zone: no towers from any source |