Santander comprises 10 barangays with an estimated population of 16,950. 4 of its barangays (40%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bunlan | 3,114 | 0 | Dead zone: no towers from any source |
| Cabutongan | 911 | 0 | Dead zone: no towers from any source |
| Candamiang | 1,227 | 0 | Dead zone: no towers from any source |
| Canlumacad | 764 | 2 | Crowdsourced signal only (no registered tower) |
| Liloan | 1,102 | 7 | Crowdsourced signal only (no registered tower) |
| Lip-tong | 1,203 | 0 | Dead zone: no towers from any source |
| Looc | 2,195 | 5 | Crowdsourced signal only (no registered tower) |
| Pasil | 1,495 | 4 | Crowdsourced signal only (no registered tower) |
| Poblacion | 2,334 | 6 | Crowdsourced signal only (no registered tower) |
| Talisay | 2,605 | 2 | Crowdsourced signal only (no registered tower) |