Alangalang comprises 54 barangays with an estimated population of 57,389. 39 of its barangays (72%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aslum | 254 | 0 | Dead zone: no towers from any source |
| Astorga (Burabod) | 1,251 | 0 | Dead zone: no towers from any source |
| Bato | 193 | 0 | Dead zone: no towers from any source |
| Binongto-an | 4,677 | 5 | Crowdsourced signal only (no registered tower) |
| Binotong | 226 | 0 | Dead zone: no towers from any source |
| Blumentritt (Pob.) | 561 | 0 | Dead zone: no towers from any source |
| Bobonon | 775 | 9 | Crowdsourced signal only (no registered tower) |
| Borseth | 1,727 | 0 | Dead zone: no towers from any source |
| Buenavista | 504 | 0 | Dead zone: no towers from any source |
| Bugho | 781 | 0 | Dead zone: no towers from any source |
| Buri | 279 | 0 | Dead zone: no towers from any source |
| Cabadsan | 2,549 | 0 | Dead zone: no towers from any source |
| Calaasan | 338 | 0 | Dead zone: no towers from any source |
| Cambahanon | 573 | 0 | Dead zone: no towers from any source |
| Cambolao | 426 | 0 | Dead zone: no towers from any source |
| Canvertudes | 451 | 0 | Dead zone: no towers from any source |
| Capiz | 1,154 | 0 | Dead zone: no towers from any source |
| Cavite | 1,197 | 6 | Crowdsourced signal only (no registered tower) |
| Cogon | 549 | 0 | Dead zone: no towers from any source |
| Dapdap | 2,136 | 7 | Crowdsourced signal only (no registered tower) |
| Divisoria | 761 | 0 | Dead zone: no towers from any source |
| Ekiran | 452 | 0 | Dead zone: no towers from any source |
| Hinapolan | 207 | 0 | Dead zone: no towers from any source |
| Holy Child I (Pob.) | 514 | 1 | Crowdsourced signal only (no registered tower) |
| Holy Child II (Pob.) | 446 | 1 | Crowdsourced signal only (no registered tower) |
| Hubang | 3,792 | 1 | Crowdsourced signal only (no registered tower) |
| Hupit | 814 | 0 | Dead zone: no towers from any source |
| Langit | 1,326 | 0 | Dead zone: no towers from any source |
| Lingayon | 2,436 | 2 | Crowdsourced signal only (no registered tower) |
| Lourdes | 485 | 0 | Dead zone: no towers from any source |
| Lukay | 779 | 0 | Dead zone: no towers from any source |
| Magsaysay | 446 | 0 | Dead zone: no towers from any source |
| Milagrosa (Pob.) | 159 | 0 | Dead zone: no towers from any source |
| Mudboron | 4,391 | 4 | Crowdsourced signal only (no registered tower) |
| P. Barrantes | 3,224 | 0 | Dead zone: no towers from any source |
| Pepita | 342 | 0 | Dead zone: no towers from any source |
| Peñalosa | 942 | 0 | Dead zone: no towers from any source |
| Salvacion | 2,734 | 1 | Crowdsourced signal only (no registered tower) |
| Salvacion Poblacion | 244 | 0 | Dead zone: no towers from any source |
| San Antonio | 3,410 | 0 | Dead zone: no towers from any source |
| San Antonio Pob. (Patong Norte) | 398 | 1 | Crowdsourced signal only (no registered tower) |
| San Diego | 2,283 | 0 | Dead zone: no towers from any source |
| San Francisco East | 380 | 0 | Dead zone: no towers from any source |
| San Francisco West | 280 | 0 | Dead zone: no towers from any source |
| San Isidro | 964 | 1 | Crowdsourced signal only (no registered tower) |
| San Pedro | 986 | 0 | Dead zone: no towers from any source |
| San Roque (Pob.) | 150 | 2 | Crowdsourced signal only (no registered tower) |
| San Vicente | 1,096 | 4 | Crowdsourced signal only (no registered tower) |
| Santiago | 88 | 0 | Dead zone: no towers from any source |
| Santo Niño (Pob.) | 129 | 1 | Crowdsourced signal only (no registered tower) |
| Santol | 629 | 0 | Dead zone: no towers from any source |
| Tabangohay | 839 | 0 | Dead zone: no towers from any source |
| Tombo | 137 | 0 | Dead zone: no towers from any source |
| Veteranos | 525 | 0 | Dead zone: no towers from any source |