Sulat comprises 18 barangays with an estimated population of 5,142. 18 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 |
|---|---|---|---|
| A-et | 126 | 0 | Dead zone: no towers from any source |
| Abucay (Pob.) | 127 | 0 | Dead zone: no towers from any source |
| Baybay (Pob.) | 118 | 0 | Dead zone: no towers from any source |
| Del Remedio | 282 | 0 | Dead zone: no towers from any source |
| Kandalakit | 148 | 0 | Dead zone: no towers from any source |
| Loyola Heights (Pob.) | 68 | 0 | Dead zone: no towers from any source |
| Mabini | 325 | 0 | Dead zone: no towers from any source |
| Maglipay (Pob.) | 747 | 0 | Dead zone: no towers from any source |
| Maramara (Pob.) | 17 | 0 | Dead zone: no towers from any source |
| Riverside (Pob.) | 547 | 0 | Dead zone: no towers from any source |
| San Francisco | 437 | 0 | Dead zone: no towers from any source |
| San Isidro | 437 | 0 | Dead zone: no towers from any source |
| San Juan | 459 | 0 | Dead zone: no towers from any source |
| San Mateo | 116 | 0 | Dead zone: no towers from any source |
| San Vicente | 241 | 0 | Dead zone: no towers from any source |
| Santo Niño | 236 | 0 | Dead zone: no towers from any source |
| Santo Tomas | 695 | 0 | Dead zone: no towers from any source |
| Tabi (Pob.) | 16 | 0 | Dead zone: no towers from any source |