Alcala comprises 25 barangays with an estimated population of 45,637. 17 of its barangays (68%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Abbeg | 1,524 | 0 | Dead zone: no towers from any source |
| Afusing Bato | 383 | 0 | Dead zone: no towers from any source |
| Afusing Daga | 3,236 | 0 | Dead zone: no towers from any source |
| Agani | 1,025 | 0 | Dead zone: no towers from any source |
| Baculod | 1,605 | 2 | Crowdsourced signal only (no registered tower) |
| Baybayog | 3,040 | 19 | Crowdsourced signal only (no registered tower) |
| Cabuluan | 1,568 | 0 | Dead zone: no towers from any source |
| Calantac | 2,576 | 2 | Crowdsourced signal only (no registered tower) |
| Carallangan | 991 | 0 | Dead zone: no towers from any source |
| Centro Norte (Pob.) | 1,867 | 3 | Crowdsourced signal only (no registered tower) |
| Centro Sur (Pob.) | 3,807 | 0 | Dead zone: no towers from any source |
| Dalaoig | 2,978 | 0 | Dead zone: no towers from any source |
| Damurog | 1,331 | 0 | Dead zone: no towers from any source |
| Jurisdiction | 972 | 0 | Dead zone: no towers from any source |
| Malalatan | 2,133 | 0 | Dead zone: no towers from any source |
| Maraburab | 2,210 | 7 | Crowdsourced signal only (no registered tower) |
| Masin | 1,543 | 0 | Dead zone: no towers from any source |
| Pagbangkeruan | 589 | 0 | Dead zone: no towers from any source |
| Pared | 930 | 5 | Crowdsourced signal only (no registered tower) |
| Piggatan | 2,220 | 2 | Crowdsourced signal only (no registered tower) |
| Pinopoc | 2,104 | 0 | Dead zone: no towers from any source |
| Pussian | 1,791 | 0 | Dead zone: no towers from any source |
| San Esteban | 1,847 | 0 | Dead zone: no towers from any source |
| Tamban | 1,853 | 0 | Dead zone: no towers from any source |
| Tupang | 1,514 | 5 | Crowdsourced signal only (no registered tower) |