Piat comprises 18 barangays with an estimated population of 26,373. 13 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 |
|---|---|---|---|
| Apayao | 1,088 | 0 | Dead zone: no towers from any source |
| Aquib | 924 | 0 | Dead zone: no towers from any source |
| Baung | 1,879 | 1 | Crowdsourced signal only (no registered tower) |
| Calaoagan | 1,512 | 0 | Dead zone: no towers from any source |
| Catarauan | 280 | 0 | Dead zone: no towers from any source |
| Dugayung | 340 | 0 | Dead zone: no towers from any source |
| Gumarueng | 3,317 | 0 | Dead zone: no towers from any source |
| Macapil | 306 | 0 | Dead zone: no towers from any source |
| Maguilling | 3,828 | 4 | Crowdsourced signal only (no registered tower) |
| Minanga | 1,521 | 0 | Dead zone: no towers from any source |
| Poblacion I | 489 | 0 | Dead zone: no towers from any source |
| Poblacion II | 1,440 | 0 | Dead zone: no towers from any source |
| Santa Barbara | 1,683 | 0 | Dead zone: no towers from any source |
| Santo Domingo | 4,531 | 10 | Crowdsourced signal only (no registered tower) |
| Sicatna | 77 | 0 | Dead zone: no towers from any source |
| Villa Rey (San Gaspar*) | 1,481 | 0 | Dead zone: no towers from any source |
| Villa Reyno | 1,383 | 1 | Crowdsourced signal only (no registered tower) |
| Warat | 294 | 1 | Crowdsourced signal only (no registered tower) |