Ballesteros comprises 19 barangays with an estimated population of 34,967. 13 of its barangays (68%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Ammubuan | 1,406 | 0 | Dead zone: no towers from any source |
| Baran | 1,810 | 0 | Dead zone: no towers from any source |
| Cabaritan East | 728 | 1 | Crowdsourced signal only (no registered tower) |
| Cabaritan West | 3,944 | 4 | Crowdsourced signal only (no registered tower) |
| Cabayu | 694 | 0 | Dead zone: no towers from any source |
| Cabuluan East | 1,050 | 0 | Dead zone: no towers from any source |
| Cabuluan West | 592 | 0 | Dead zone: no towers from any source |
| Centro East (Pob.) | 3,759 | 0 | Dead zone: no towers from any source |
| Centro West (Pob.) | 1,363 | 0 | Dead zone: no towers from any source |
| Fugu | 2,866 | 7 | Crowdsourced signal only (no registered tower) |
| Mabuttal East | 1,696 | 3 | Crowdsourced signal only (no registered tower) |
| Mabuttal West | 1,715 | 0 | Dead zone: no towers from any source |
| Nararagan | 1,708 | 0 | Dead zone: no towers from any source |
| Palloc | 1,704 | 0 | Dead zone: no towers from any source |
| Payagan East | 2,100 | 0 | Dead zone: no towers from any source |
| Payagan West | 486 | 0 | Dead zone: no towers from any source |
| San Juan | 1,409 | 0 | Dead zone: no towers from any source |
| Santa Cruz | 4,415 | 1 | Crowdsourced signal only (no registered tower) |
| Zitanga | 1,522 | 1 | Crowdsourced signal only (no registered tower) |