Diadi comprises 19 barangays with an estimated population of 19,602. 16 of its barangays (84%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ampakleng | 528 | 0 | Dead zone: no towers from any source |
| Arwas | 238 | 0 | Dead zone: no towers from any source |
| Balete | 1,593 | 0 | Dead zone: no towers from any source |
| Bugnay | 1,721 | 0 | Dead zone: no towers from any source |
| Butao | 1,399 | 0 | Dead zone: no towers from any source |
| Decabacan | 682 | 0 | Dead zone: no towers from any source |
| Duruarog | 1,043 | 0 | Dead zone: no towers from any source |
| Escoting | 1,729 | 0 | Dead zone: no towers from any source |
| Langka | 255 | 0 | Dead zone: no towers from any source |
| Lurad | 661 | 0 | Dead zone: no towers from any source |
| Nagsabaran | 999 | 3 | Crowdsourced signal only (no registered tower) |
| Namamparan | 1,286 | 2 | Crowdsourced signal only (no registered tower) |
| Pinya | 1,090 | 0 | Dead zone: no towers from any source |
| Poblacion | 2,704 | 6 | Crowdsourced signal only (no registered tower) |
| Rosario | 616 | 0 | Dead zone: no towers from any source |
| San Luis | 532 | 0 | Dead zone: no towers from any source |
| San Pablo | 1,056 | 0 | Dead zone: no towers from any source |
| Villa Aurora | 1,271 | 0 | Dead zone: no towers from any source |
| Villa Florentino | 199 | 0 | Dead zone: no towers from any source |