Diffun comprises 33 barangays with an estimated population of 72,677. 20 of its barangays (61%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Aklan Village | 688 | 0 | Dead zone: no towers from any source |
| Andres Bonifacio (Pob.) | 5,206 | 6 | Crowdsourced signal only (no registered tower) |
| Aurora East (Pob.) | 1,792 | 3 | Crowdsourced signal only (no registered tower) |
| Aurora West (Pob.) | 1,998 | 5 | Crowdsourced signal only (no registered tower) |
| Baguio Village | 861 | 0 | Dead zone: no towers from any source |
| Balagbag | 1,575 | 15 | Crowdsourced signal only (no registered tower) |
| Bannawag | 2,001 | 3 | Crowdsourced signal only (no registered tower) |
| Cajel | 5,002 | 4 | Crowdsourced signal only (no registered tower) |
| Campamento | 2,274 | 0 | Dead zone: no towers from any source |
| Diego Silang | 2,670 | 5 | Crowdsourced signal only (no registered tower) |
| Don Faustino Pagaduan | 384 | 0 | Dead zone: no towers from any source |
| Don Mariano Perez, Sr. | 1,665 | 0 | Dead zone: no towers from any source |
| Doña Imelda | 884 | 0 | Dead zone: no towers from any source |
| Dumanisi | 2,533 | 0 | Dead zone: no towers from any source |
| Gabriela Silang | 2,294 | 0 | Dead zone: no towers from any source |
| Gregorio Pimentel | 949 | 0 | Dead zone: no towers from any source |
| Gulac | 1,852 | 0 | Dead zone: no towers from any source |
| Guribang | 1,058 | 0 | Dead zone: no towers from any source |
| Ifugao Village | 1,496 | 0 | Dead zone: no towers from any source |
| Isidro Paredes | 3,883 | 1 | Crowdsourced signal only (no registered tower) |
| Liwayway | 2,525 | 0 | Dead zone: no towers from any source |
| Luttuad | 5,568 | 1 | Crowdsourced signal only (no registered tower) |
| Magsaysay | 1,744 | 0 | Dead zone: no towers from any source |
| Makate | 741 | 0 | Dead zone: no towers from any source |
| Maria Clara | 3,789 | 0 | Dead zone: no towers from any source |
| Rafael Palma (Don Sergio Osmeña) | 1,037 | 0 | Dead zone: no towers from any source |
| Ricarte Norte | 2,965 | 1 | Crowdsourced signal only (no registered tower) |
| Ricarte Sur | 960 | 0 | Dead zone: no towers from any source |
| Rizal (Pob.) | 5,114 | 2 | Crowdsourced signal only (no registered tower) |
| San Antonio | 785 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 3,117 | 6 | Crowdsourced signal only (no registered tower) |
| San Pascual | 988 | 0 | Dead zone: no towers from any source |
| Villa Pascua | 2,279 | 0 | Dead zone: no towers from any source |