Alilem comprises 9 barangays with an estimated population of 8,028. 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 |
|---|---|---|---|
| Alilem Daya (Pob.) | 2,493 | 1 | Crowdsourced signal only (no registered tower) |
| Amilongan | 520 | 0 | Dead zone: no towers from any source |
| Anaao | 632 | 0 | Dead zone: no towers from any source |
| Apang | 587 | 0 | Dead zone: no towers from any source |
| Apaya | 579 | 0 | Dead zone: no towers from any source |
| Batbato | 733 | 0 | Dead zone: no towers from any source |
| Daddaay | 817 | 0 | Dead zone: no towers from any source |
| Dalawa | 1,330 | 0 | Dead zone: no towers from any source |
| Kiat | 337 | 0 | Dead zone: no towers from any source |