Prieto Diaz comprises 23 barangays with an estimated population of 20,589. 18 of its barangays (78%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Brillante (Pob.) | 92 | 1 | Crowdsourced signal only (no registered tower) |
| Bulawan | 1,169 | 0 | Dead zone: no towers from any source |
| Calao | 2,255 | 2 | Crowdsourced signal only (no registered tower) |
| Carayat | 753 | 0 | Dead zone: no towers from any source |
| Diamante | 637 | 0 | Dead zone: no towers from any source |
| Gogon | 3,647 | 1 | Crowdsourced signal only (no registered tower) |
| Lupi | 683 | 0 | Dead zone: no towers from any source |
| Maningcay de Oro | 704 | 0 | Dead zone: no towers from any source |
| Manlabong | 588 | 0 | Dead zone: no towers from any source |
| Perlas | 123 | 0 | Dead zone: no towers from any source |
| Quidolog | 539 | 0 | Dead zone: no towers from any source |
| Rizal | 347 | 0 | Dead zone: no towers from any source |
| San Antonio | 399 | 0 | Dead zone: no towers from any source |
| San Fernando | 1,710 | 0 | Dead zone: no towers from any source |
| San Isidro | 1,285 | 0 | Dead zone: no towers from any source |
| San Juan | 400 | 0 | Dead zone: no towers from any source |
| San Rafael | 1,181 | 0 | Dead zone: no towers from any source |
| San Ramon | 441 | 0 | Dead zone: no towers from any source |
| Santa Lourdes | 924 | 1 | Crowdsourced signal only (no registered tower) |
| Santo Domingo | 199 | 0 | Dead zone: no towers from any source |
| Talisayan | 881 | 0 | Dead zone: no towers from any source |
| Tupaz | 811 | 2 | Crowdsourced signal only (no registered tower) |
| Ulag | 821 | 0 | Dead zone: no towers from any source |