Sablan comprises 8 barangays with an estimated population of 10,583. 3 of its barangays (38%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagong | 1,233 | 1 | Crowdsourced signal only (no registered tower) |
| Balluay | 275 | 0 | Dead zone: no towers from any source |
| Banangan | 1,772 | 18 | Crowdsourced signal only (no registered tower) |
| Banengbeng | 959 | 0 | Dead zone: no towers from any source |
| Bayabas | 2,079 | 4 | Crowdsourced signal only (no registered tower) |
| Kamog | 952 | 1 | Crowdsourced signal only (no registered tower) |
| Pappa | 693 | 0 | Dead zone: no towers from any source |
| Poblacion | 2,620 | 7 | Crowdsourced signal only (no registered tower) |