Ubay comprises 44 barangays with an estimated population of 73,430. 32 of its barangays (73%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Achila | 1,283 | 2 | Crowdsourced signal only (no registered tower) |
| Bay-ang | 1,228 | 0 | Dead zone: no towers from any source |
| Benliw | 1,167 | 8 | Crowdsourced signal only (no registered tower) |
| Biabas | 2,240 | 0 | Dead zone: no towers from any source |
| Bongbong | 1,009 | 0 | Dead zone: no towers from any source |
| Bood | 3,208 | 1 | Crowdsourced signal only (no registered tower) |
| Buenavista | 229 | 0 | Dead zone: no towers from any source |
| Bulilis | 2,910 | 0 | Dead zone: no towers from any source |
| Cagting | 1,021 | 0 | Dead zone: no towers from any source |
| Calanggaman | 2,413 | 0 | Dead zone: no towers from any source |
| California | 951 | 0 | Dead zone: no towers from any source |
| Camali-an | 635 | 0 | Dead zone: no towers from any source |
| Camambugan | 3,194 | 12 | Crowdsourced signal only (no registered tower) |
| Casate | 2,395 | 2 | Crowdsourced signal only (no registered tower) |
| Cuya | 536 | 0 | Dead zone: no towers from any source |
| Fatima | 2,806 | 0 | Dead zone: no towers from any source |
| Gabi | 2,057 | 0 | Dead zone: no towers from any source |
| Governor Boyles | 404 | 1 | Crowdsourced signal only (no registered tower) |
| Guintabo-an | 166 | 0 | Dead zone: no towers from any source |
| Hambabauran | 1,045 | 0 | Dead zone: no towers from any source |
| Humayhumay | 1,039 | 1 | Crowdsourced signal only (no registered tower) |
| Ilihan | 277 | 16 | Crowdsourced signal only (no registered tower) |
| Imelda | 1,449 | 0 | Dead zone: no towers from any source |
| Juagdan | 1,459 | 0 | Dead zone: no towers from any source |
| Katarungan | 2,073 | 0 | Dead zone: no towers from any source |
| Lomangog | 2,497 | 0 | Dead zone: no towers from any source |
| Los Angeles | 633 | 0 | Dead zone: no towers from any source |
| Pag-asa | 649 | 0 | Dead zone: no towers from any source |
| Pangpang | 1,435 | 0 | Dead zone: no towers from any source |
| Poblacion | 3,367 | 15 | Crowdsourced signal only (no registered tower) |
| San Francisco | 2,997 | 0 | Dead zone: no towers from any source |
| San Isidro | 638 | 0 | Dead zone: no towers from any source |
| San Pascual | 4,328 | 0 | Dead zone: no towers from any source |
| San Vicente | 3,664 | 0 | Dead zone: no towers from any source |
| Sentinila | 725 | 0 | Dead zone: no towers from any source |
| Sinandigan | 2,692 | 1 | Crowdsourced signal only (no registered tower) |
| Tapal | 1,196 | 0 | Dead zone: no towers from any source |
| Tapon | 2,442 | 3 | Crowdsourced signal only (no registered tower) |
| Tintinan | 565 | 0 | Dead zone: no towers from any source |
| Tipolo | 2,371 | 0 | Dead zone: no towers from any source |
| Tubog | 546 | 0 | Dead zone: no towers from any source |
| Tuboran | 1,541 | 0 | Dead zone: no towers from any source |
| Union | 2,982 | 3 | Crowdsourced signal only (no registered tower) |
| Villa Teresita | 968 | 0 | Dead zone: no towers from any source |