Ferrol comprises 6 barangays with an estimated population of 6,758. 6 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Agnonoc | 576 | 0 | Dead zone: no towers from any source |
| Bunsoran | 1,176 | 0 | Dead zone: no towers from any source |
| Claro M. Recto | 1,085 | 0 | Dead zone: no towers from any source |
| Hinaguman | 681 | 0 | Dead zone: no towers from any source |
| Poblacion (Ferrol) | 1,664 | 0 | Dead zone: no towers from any source |
| Tubigon | 1,576 | 0 | Dead zone: no towers from any source |