Sagbayan (Borja) comprises 24 barangays with an estimated population of 19,999. 14 of its barangays (58%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Calangahan | 587 | 0 | Dead zone: no towers from any source |
| Canmano | 1,301 | 0 | Dead zone: no towers from any source |
| Canmaya Centro | 1,184 | 0 | Dead zone: no towers from any source |
| Canmaya Diot | 1,308 | 3 | Crowdsourced signal only (no registered tower) |
| Dagnawan | 215 | 1 | Crowdsourced signal only (no registered tower) |
| Kabasacan | 484 | 0 | Dead zone: no towers from any source |
| Kagawasan | 236 | 0 | Dead zone: no towers from any source |
| Katipunan | 767 | 0 | Dead zone: no towers from any source |
| Langtad | 471 | 2 | Crowdsourced signal only (no registered tower) |
| Libertad Norte | 347 | 0 | Dead zone: no towers from any source |
| Libertad Sur | 203 | 0 | Dead zone: no towers from any source |
| Mantalongon | 337 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion | 5,120 | 3 | Crowdsourced signal only (no registered tower) |
| Sagbayan Sur | 604 | 4 | Crowdsourced signal only (no registered tower) |
| San Agustin | 1,242 | 0 | Dead zone: no towers from any source |
| San Antonio | 429 | 1 | Crowdsourced signal only (no registered tower) |
| San Isidro | 1,278 | 0 | Dead zone: no towers from any source |
| San Ramon | 265 | 1 | Crowdsourced signal only (no registered tower) |
| San Roque | 504 | 0 | Dead zone: no towers from any source |
| San Vicente Norte | 656 | 0 | Dead zone: no towers from any source |
| San Vicente Sur | 220 | 0 | Dead zone: no towers from any source |
| Santa Catalina | 536 | 2 | Crowdsourced signal only (no registered tower) |
| Santa Cruz | 588 | 3 | Crowdsourced signal only (no registered tower) |
| Ubojan | 1,117 | 0 | Dead zone: no towers from any source |