Siasi comprises 50 barangays with an estimated population of 50,839. 49 of its barangays (98%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bakud | 812 | 0 | Dead zone: no towers from any source |
| Buan | 2,332 | 0 | Dead zone: no towers from any source |
| Bulansing Tara | 432 | 0 | Dead zone: no towers from any source |
| Bulihkullul | 100 | 0 | Dead zone: no towers from any source |
| Campo Islam | 1,926 | 0 | Dead zone: no towers from any source |
| Duggo | 1,952 | 0 | Dead zone: no towers from any source |
| Duhol Tara | 381 | 0 | Dead zone: no towers from any source |
| East Kungtad | 1,508 | 0 | Dead zone: no towers from any source |
| East Sisangat | 288 | 0 | Dead zone: no towers from any source |
| Ipil | 908 | 0 | Dead zone: no towers from any source |
| Jambangan | 659 | 0 | Dead zone: no towers from any source |
| Kabubu | 858 | 0 | Dead zone: no towers from any source |
| Kong-Kong Laminusa | 1,547 | 0 | Dead zone: no towers from any source |
| Kud-kud | 252 | 0 | Dead zone: no towers from any source |
| Kungtad West | 1,081 | 0 | Dead zone: no towers from any source |
| Latung | 2,397 | 0 | Dead zone: no towers from any source |
| Luuk Laminusa | 829 | 0 | Dead zone: no towers from any source |
| Luuk Tara | 402 | 0 | Dead zone: no towers from any source |
| Manta | 844 | 0 | Dead zone: no towers from any source |
| Minapan | 1,443 | 0 | Dead zone: no towers from any source |
| Nipa-nipa | 1,262 | 0 | Dead zone: no towers from any source |
| North Laud | 1,970 | 0 | Dead zone: no towers from any source |
| North Manta | 573 | 0 | Dead zone: no towers from any source |
| North Musu Laud | 282 | 0 | Dead zone: no towers from any source |
| North Silumpak | 0 | 0 | Dead zone: no towers from any source |
| Pislong | 918 | 0 | Dead zone: no towers from any source |
| Poblacion (Campo Baro) | 2,306 | 0 | Dead zone: no towers from any source |
| Punungan | 175 | 0 | Dead zone: no towers from any source |
| Puukan Laminusa | 835 | 0 | Dead zone: no towers from any source |
| Ratag | 1,705 | 0 | Dead zone: no towers from any source |
| Sablay | 867 | 0 | Dead zone: no towers from any source |
| Sarukot | 731 | 0 | Dead zone: no towers from any source |
| Siburi | 781 | 0 | Dead zone: no towers from any source |
| Singko | 752 | 0 | Dead zone: no towers from any source |
| Siolakan | 2,006 | 0 | Dead zone: no towers from any source |
| Siowing | 384 | 0 | Dead zone: no towers from any source |
| Sipanding | 1,174 | 0 | Dead zone: no towers from any source |
| Sisangat | 505 | 0 | Dead zone: no towers from any source |
| Siundoh | 253 | 0 | Dead zone: no towers from any source |
| South Musu Laud | 282 | 0 | Dead zone: no towers from any source |
| South Silumpak | 66 | 0 | Dead zone: no towers from any source |
| Southwestern Bulikullul | 284 | 0 | Dead zone: no towers from any source |
| Subah Buaya | 2,534 | 0 | Dead zone: no towers from any source |
| Tampakan Laminusa | 184 | 0 | Dead zone: no towers from any source |
| Tengah Laminusa | 713 | 0 | Dead zone: no towers from any source |
| Tong Laminusa | 1,318 | 0 | Dead zone: no towers from any source |
| Tong-tong | 3,933 | 5 | Crowdsourced signal only (no registered tower) |
| Tonglabah | 334 | 0 | Dead zone: no towers from any source |
| Tubig Kutah | 1,040 | 0 | Dead zone: no towers from any source |
| Tulling | 1,721 | 0 | Dead zone: no towers from any source |