City of Calamba comprises 54 barangays with an estimated population of 490,492. 6 of its barangays (11%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Bagong Kalsada | 4,351 | 28 | Crowdsourced signal only (no registered tower) |
| Banadero | 13,176 | 3 | Crowdsourced signal only (no registered tower) |
| Banlic | 16,417 | 18 | Crowdsourced signal only (no registered tower) |
| Barandal | 6,957 | 26 | Crowdsourced signal only (no registered tower) |
| Barangay 1 (Pob.) | 7,459 | 30 | Crowdsourced signal only (no registered tower) |
| Barangay 2 (Pob.) | 5,835 | 2 | Crowdsourced signal only (no registered tower) |
| Barangay 3 (Pob.) | 5,829 | 11 | Crowdsourced signal only (no registered tower) |
| Barangay 4 (Pob.) | 4,146 | 1 | Crowdsourced signal only (no registered tower) |
| Barangay 5 (Pob.) | 4,176 | 3 | Crowdsourced signal only (no registered tower) |
| Barangay 6 (Pob.) | 5,098 | 2 | Crowdsourced signal only (no registered tower) |
| Barangay 7 (Pob.) | 1,615 | 0 | Dead zone: no towers from any source |
| Batino | 3,498 | 67 | Crowdsourced signal only (no registered tower) |
| Bubuyan | 1,327 | 0 | Dead zone: no towers from any source |
| Bucal | 24,841 | 78 | Crowdsourced signal only (no registered tower) |
| Bunggo | 4,064 | 7 | Crowdsourced signal only (no registered tower) |
| Burol | 3,706 | 1 | Crowdsourced signal only (no registered tower) |
| Camaligan | 1,586 | 0 | Dead zone: no towers from any source |
| Canlubang | 82,264 | 332 | Crowdsourced signal only (no registered tower) |
| Halang | 9,025 | 38 | Crowdsourced signal only (no registered tower) |
| Hornalan | 2,915 | 17 | Crowdsourced signal only (no registered tower) |
| Kay-Anlog | 3,455 | 2 | Crowdsourced signal only (no registered tower) |
| La Mesa | 14,128 | 85 | Crowdsourced signal only (no registered tower) |
| Laguerta | 1,431 | 7 | Crowdsourced signal only (no registered tower) |
| Lawa | 9,572 | 16 | Crowdsourced signal only (no registered tower) |
| Lecheria | 7,543 | 26 | Crowdsourced signal only (no registered tower) |
| Lingga | 3,583 | 2 | Crowdsourced signal only (no registered tower) |
| Looc | 33,202 | 3 | Crowdsourced signal only (no registered tower) |
| Mabato | 564 | 2 | Crowdsourced signal only (no registered tower) |
| Majada Labas | 8,973 | 20 | Crowdsourced signal only (no registered tower) |
| Makiling | 10,823 | 83 | Crowdsourced signal only (no registered tower) |
| Mapagong | 9,125 | 60 | Crowdsourced signal only (no registered tower) |
| Masili | 992 | 1 | Crowdsourced signal only (no registered tower) |
| Maunong | 3,641 | 49 | Crowdsourced signal only (no registered tower) |
| Mayapa | 21,336 | 108 | Crowdsourced signal only (no registered tower) |
| Milagrosa (Tulo) | 6,382 | 69 | Crowdsourced signal only (no registered tower) |
| Paciano Rizal | 12,970 | 80 | Crowdsourced signal only (no registered tower) |
| Palingon | 1,092 | 0 | Dead zone: no towers from any source |
| Palo-Alto | 12,816 | 14 | Crowdsourced signal only (no registered tower) |
| Pansol | 10,952 | 89 | Crowdsourced signal only (no registered tower) |
| Parian | 32,227 | 68 | Crowdsourced signal only (no registered tower) |
| Prinza | 1,415 | 32 | Crowdsourced signal only (no registered tower) |
| Punta | 5,487 | 22 | Crowdsourced signal only (no registered tower) |
| Puting Lupa | 2,395 | 0 | Dead zone: no towers from any source |
| Real | 20,601 | 127 | Crowdsourced signal only (no registered tower) |
| Saimsim | 1,931 | 16 | Crowdsourced signal only (no registered tower) |
| Sampiruhan | 8,531 | 2 | Crowdsourced signal only (no registered tower) |
| San Cristobal | 12,509 | 26 | Crowdsourced signal only (no registered tower) |
| San Jose | 3,799 | 3 | Crowdsourced signal only (no registered tower) |
| San Juan | 3,501 | 2 | Crowdsourced signal only (no registered tower) |
| Sirang Lupa | 5,207 | 1 | Crowdsourced signal only (no registered tower) |
| Sucol | 3,267 | 3 | Crowdsourced signal only (no registered tower) |
| Turbina | 2,477 | 58 | Crowdsourced signal only (no registered tower) |
| Ulango | 1,169 | 2 | Crowdsourced signal only (no registered tower) |
| Uwisan | 5,111 | 0 | Dead zone: no towers from any source |