Cervantes comprises 13 barangays with an estimated population of 27,969. 6 of its barangays (46%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aluling | 1,888 | 2 | Crowdsourced signal only (no registered tower) |
| Comillas North | 4,425 | 0 | Dead zone: no towers from any source |
| Comillas South | 1,119 | 0 | Dead zone: no towers from any source |
| Concepcion (Pob.) | 1,212 | 1 | Crowdsourced signal only (no registered tower) |
| Dinwede East | 2,047 | 1 | Crowdsourced signal only (no registered tower) |
| Dinwede West | 1,202 | 2 | Crowdsourced signal only (no registered tower) |
| Libang | 1,711 | 0 | Dead zone: no towers from any source |
| Malaya | 2,660 | 8 | Crowdsourced signal only (no registered tower) |
| Pilipil | 968 | 0 | Dead zone: no towers from any source |
| Remedios | 1,341 | 0 | Dead zone: no towers from any source |
| Rosario (Pob.) | 2,507 | 2 | Crowdsourced signal only (no registered tower) |
| San Juan | 5,590 | 1 | Crowdsourced signal only (no registered tower) |
| San Luis | 1,299 | 0 | Dead zone: no towers from any source |