Alcala comprises 21 barangays with an estimated population of 59,973. 11 of its barangays (52%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anulid | 8,263 | 1 | Crowdsourced signal only (no registered tower) |
| Atainan | 1,202 | 0 | Dead zone: no towers from any source |
| Bersamin | 3,104 | 0 | Dead zone: no towers from any source |
| Canarvacanan | 2,320 | 0 | Dead zone: no towers from any source |
| Caranglaan | 1,495 | 1 | Crowdsourced signal only (no registered tower) |
| Curareng | 574 | 0 | Dead zone: no towers from any source |
| Gualsic | 2,047 | 1 | Crowdsourced signal only (no registered tower) |
| Kisikis | 6,067 | 3 | Crowdsourced signal only (no registered tower) |
| Laoac | 3,706 | 4 | Crowdsourced signal only (no registered tower) |
| Macayo | 5,599 | 0 | Dead zone: no towers from any source |
| Pindangan Centro | 1,083 | 0 | Dead zone: no towers from any source |
| Pindangan East | 2,257 | 0 | Dead zone: no towers from any source |
| Pindangan West | 1,317 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion East | 1,388 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion West | 1,932 | 1 | Crowdsourced signal only (no registered tower) |
| San Juan | 2,121 | 1 | Crowdsourced signal only (no registered tower) |
| San Nicolas | 1,231 | 0 | Dead zone: no towers from any source |
| San Pedro Apartado | 3,622 | 0 | Dead zone: no towers from any source |
| San Pedro Ili | 6,085 | 0 | Dead zone: no towers from any source |
| San Vicente | 3,487 | 6 | Crowdsourced signal only (no registered tower) |
| Vacante | 1,073 | 0 | Dead zone: no towers from any source |