Caibiran comprises 17 barangays with an estimated population of 20,799. 12 of its barangays (71%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alegria | 1,329 | 0 | Dead zone: no towers from any source |
| Asug | 266 | 0 | Dead zone: no towers from any source |
| Bari-is | 776 | 0 | Dead zone: no towers from any source |
| Binohangan | 2,743 | 0 | Dead zone: no towers from any source |
| Cabibihan | 4,295 | 1 | Crowdsourced signal only (no registered tower) |
| Caulangohan (Marevil) | 331 | 0 | Dead zone: no towers from any source |
| Kawayanon | 462 | 0 | Dead zone: no towers from any source |
| Looc | 601 | 0 | Dead zone: no towers from any source |
| Manlabang | 885 | 1 | Crowdsourced signal only (no registered tower) |
| Maurang | 730 | 0 | Dead zone: no towers from any source |
| Palanay (Pob.) | 303 | 2 | Crowdsourced signal only (no registered tower) |
| Palengke (Pob.) | 1,059 | 0 | Dead zone: no towers from any source |
| Tomalistis | 561 | 3 | Crowdsourced signal only (no registered tower) |
| Union | 434 | 0 | Dead zone: no towers from any source |
| Uson | 1,569 | 0 | Dead zone: no towers from any source |
| Victory (Pob.) | 3,534 | 5 | Crowdsourced signal only (no registered tower) |
| Villa Vicenta (Mainit) | 921 | 0 | Dead zone: no towers from any source |