Basay comprises 10 barangays with an estimated population of 32,498. 5 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Actin | 3,997 | 3 | Crowdsourced signal only (no registered tower) |
| Bal-os | 2,445 | 7 | Crowdsourced signal only (no registered tower) |
| Bongalonan | 3,100 | 2 | Crowdsourced signal only (no registered tower) |
| Cabalayongan | 2,389 | 0 | Dead zone: no towers from any source |
| Cabatuanan | 4,771 | 0 | Dead zone: no towers from any source |
| Linantayan | 2,009 | 0 | Dead zone: no towers from any source |
| Maglinao | 2,486 | 0 | Dead zone: no towers from any source |
| Nagbo-alao | 5,660 | 7 | Crowdsourced signal only (no registered tower) |
| Olandao | 2,475 | 0 | Dead zone: no towers from any source |
| Poblacion | 3,166 | 3 | Crowdsourced signal only (no registered tower) |