Cabangan comprises 22 barangays with an estimated population of 28,996. 14 of its barangays (64%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Anonang | 1,452 | 0 | Dead zone: no towers from any source |
| Apo-apo | 730 | 1 | Crowdsourced signal only (no registered tower) |
| Arew | 589 | 2 | Crowdsourced signal only (no registered tower) |
| Banuanbayo (Pob.) | 160 | 1 | Crowdsourced signal only (no registered tower) |
| Cadmang-Reserva | 2,741 | 0 | Dead zone: no towers from any source |
| Camiling (Camiing) | 1,108 | 0 | Dead zone: no towers from any source |
| Casabaan | 275 | 0 | Dead zone: no towers from any source |
| Del Carmen (Pob.) | 108 | 0 | Dead zone: no towers from any source |
| Dolores (Pob.) | 2,340 | 1 | Crowdsourced signal only (no registered tower) |
| Felmida-Diaz | 541 | 2 | Crowdsourced signal only (no registered tower) |
| Laoag | 1,298 | 0 | Dead zone: no towers from any source |
| Lomboy | 1,005 | 0 | Dead zone: no towers from any source |
| Longos | 3,590 | 2 | Crowdsourced signal only (no registered tower) |
| Mabanglit | 1,751 | 2 | Crowdsourced signal only (no registered tower) |
| New San Juan | 3,228 | 0 | Dead zone: no towers from any source |
| San Antonio | 535 | 0 | Dead zone: no towers from any source |
| San Isidro | 1,993 | 0 | Dead zone: no towers from any source |
| San Juan (Pob.) | 769 | 0 | Dead zone: no towers from any source |
| San Rafael | 907 | 0 | Dead zone: no towers from any source |
| Santa Rita | 2,604 | 0 | Dead zone: no towers from any source |
| Santo Niño | 881 | 2 | Crowdsourced signal only (no registered tower) |
| Tondo | 391 | 0 | Dead zone: no towers from any source |