San Andres comprises 7 barangays with an estimated population of 43,991. 6 of its barangays (86%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Alibihaban | 1,294 | 0 | Dead zone: no towers from any source |
| Camflora | 10,665 | 0 | Dead zone: no towers from any source |
| Mangero | 4,531 | 0 | Dead zone: no towers from any source |
| Pansoy | 8,313 | 2 | Crowdsourced signal only (no registered tower) |
| Poblacion | 6,585 | 0 | Dead zone: no towers from any source |
| Tala | 6,020 | 0 | Dead zone: no towers from any source |
| Talisay | 6,583 | 0 | Dead zone: no towers from any source |