Sitangkai comprises 9 barangays with an estimated population of 6,148. 8 of its barangays (89%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Datu Baguinda Putih | 750 | 0 | Dead zone: no towers from any source |
| Imam Sapie | 902 | 1 | Crowdsourced signal only (no registered tower) |
| North Larap | 716 | 0 | Dead zone: no towers from any source |
| Panglima Alari | 924 | 0 | Dead zone: no towers from any source |
| Sipangkot | 832 | 0 | Dead zone: no towers from any source |
| Sitangkai Poblacion | 578 | 0 | Dead zone: no towers from any source |
| South Larap (Larap) | 266 | 0 | Dead zone: no towers from any source |
| Tongmageng | 870 | 0 | Dead zone: no towers from any source |
| Tongusong | 310 | 0 | Dead zone: no towers from any source |