Caba comprises 17 barangays with an estimated population of 17,964. 8 of its barangays (47%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bautista | 563 | 4 | Crowdsourced signal only (no registered tower) |
| Gana | 2,571 | 6 | Crowdsourced signal only (no registered tower) |
| Juan Cartas | 644 | 0 | Dead zone: no towers from any source |
| Las-ud | 362 | 0 | Dead zone: no towers from any source |
| Liquicia | 842 | 1 | Crowdsourced signal only (no registered tower) |
| Poblacion Norte | 352 | 5 | Crowdsourced signal only (no registered tower) |
| Poblacion Sur | 561 | 8 | Crowdsourced signal only (no registered tower) |
| San Carlos | 984 | 0 | Dead zone: no towers from any source |
| San Cornelio | 823 | 1 | Crowdsourced signal only (no registered tower) |
| San Fermin | 1,313 | 1 | Crowdsourced signal only (no registered tower) |
| San Gregorio | 889 | 0 | Dead zone: no towers from any source |
| San Jose | 2,633 | 1 | Crowdsourced signal only (no registered tower) |
| Santiago Norte | 222 | 0 | Dead zone: no towers from any source |
| Santiago Sur | 2,605 | 0 | Dead zone: no towers from any source |
| Sobredillo | 1,409 | 1 | Crowdsourced signal only (no registered tower) |
| Urayong | 684 | 0 | Dead zone: no towers from any source |
| Wenceslao | 507 | 0 | Dead zone: no towers from any source |