Calanasan (Bayag) comprises 18 barangays with an estimated population of 23,396. 18 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Butao | 1,892 | 0 | Dead zone: no towers from any source |
| Cadaclan | 1,248 | 0 | Dead zone: no towers from any source |
| Don Roque Ablan Sr. | 1,677 | 0 | Dead zone: no towers from any source |
| Eleazar | 73 | 0 | Dead zone: no towers from any source |
| Eva Puzon | 2,315 | 0 | Dead zone: no towers from any source |
| Kabugawan | 913 | 0 | Dead zone: no towers from any source |
| Langnao | 168 | 0 | Dead zone: no towers from any source |
| Lubong | 1,211 | 0 | Dead zone: no towers from any source |
| Macalino | 98 | 0 | Dead zone: no towers from any source |
| Naguilian | 838 | 0 | Dead zone: no towers from any source |
| Namaltugan | 945 | 0 | Dead zone: no towers from any source |
| Poblacion | 1,934 | 0 | Dead zone: no towers from any source |
| Sabangan | 3,103 | 0 | Dead zone: no towers from any source |
| Santa Elena | 663 | 0 | Dead zone: no towers from any source |
| Santa Filomena | 1,391 | 0 | Dead zone: no towers from any source |
| Tanglagan | 3,675 | 0 | Dead zone: no towers from any source |
| Tubang | 796 | 0 | Dead zone: no towers from any source |
| Tubongan | 456 | 0 | Dead zone: no towers from any source |