Cell phone coverage map for San Diego County, CA
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Darker areas mean the carrier covers more of that location.
Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.
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Cell phone coverage rankings by network in San Diego County, CA
#1
T-Mobile
Coverage Score
71.4
In San Diego County, CA
- Overall
- 71.7%
- 4G LTE
- 71.6% avg. -91 dBm 4G LTE signal where 4G LTE coverage exists: avg. -91 dBm
- 5G
- 59.4% avg. -87 dBm 5G signal where 5G coverage exists: avg. -87 dBm
- Fast 5G
- 45.9% avg. -84 dBm Fast 5G signal where Fast 5G coverage exists: avg. -84 dBm
#2
Verizon
Coverage Score
66.5
In San Diego County, CA
- Overall
- 77.7%
- 4G LTE
- 77.0% avg. -94 dBm 4G LTE signal where 4G LTE coverage exists: avg. -94 dBm
- 5G
- 50.6% avg. -98 dBm 5G signal where 5G coverage exists: avg. -98 dBm
- Fast 5G
- 37.3% avg. -94 dBm Fast 5G signal where Fast 5G coverage exists: avg. -94 dBm
#3
AT&T
Coverage Score
57.3
In San Diego County, CA
- Overall
- 73.4%
- 4G LTE
- 73.3% avg. -105 dBm 4G LTE signal where 4G LTE coverage exists: avg. -105 dBm
- 5G
- 50.7% avg. -109 dBm 5G signal where 5G coverage exists: avg. -109 dBm
- Fast 5G
- 39.5% avg. -108 dBm Fast 5G signal where Fast 5G coverage exists: avg. -108 dBm
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Coverage by city in San Diego County, CA
Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.
| City | Verizon | AT&T | T-Mobile |
|---|---|---|---|
| Alpine, CA | 94.8% 94.1% 80.7% 57.0% | 82.4% 82.4% 61.0% 51.5% | 92.0% 92.0% 78.6% 54.4% |
| Bonita, CA | 100.0% 100.0% 99.0% 94.3% | 100.0% 100.0% 99.0% 80.0% | 100.0% 100.0% 100.0% 97.1% |
| Bonsall, CA | 100.0% 100.0% 98.7% 83.9% | 100.0% 100.0% 98.7% 88.3% | 100.0% 100.0% 97.0% 86.6% |
| Borrego Springs, CA | 99.8% 99.8% 94.2% 89.0% | 95.5% 95.5% 78.5% 77.6% | 1.5% 1.5% 0.1% 0.0% |
| Bostonia, CA | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 87.5% | 100.0% 100.0% 100.0% 100.0% |
| Boulevard, CA | 100.0% 100.0% 77.1% 48.2% | 94.0% 94.0% 67.5% 62.7% | 100.0% 100.0% 100.0% 84.3% |
| Camp Pendleton, CA | 88.7% 88.4% 30.9% 12.7% | 81.7% 81.1% 56.1% 43.6% | 76.0% 76.0% 39.4% 23.5% |
| Camp Pendleton Mainside, CA | 99.6% 99.6% 85.2% 60.0% | 96.5% 96.5% 53.0% 42.6% | 99.6% 99.6% 44.8% 34.8% |
| Camp Pendleton South, CA | 100.0% 100.0% 86.6% 80.5% | 98.7% 98.7% 96.6% 79.9% | 98.7% 98.7% 96.0% 84.6% |
| Campo, CA | 93.7% 93.3% 60.8% 47.0% | 94.9% 94.9% 78.0% 64.0% | 84.1% 84.1% 70.1% 45.5% |
| Cardiff By The Sea, CA | 100.0% 100.0% 98.0% 83.7% | 100.0% 100.0% 100.0% 77.6% | 100.0% 100.0% 100.0% 91.8% |
| Carlsbad, CA | 100.0% 100.0% 96.9% 88.8% | 99.8% 99.8% 99.3% 70.1% | 99.9% 99.9% 97.7% 87.3% |
| Casa de Oro-Mount Helix, CA | 100.0% 100.0% 100.0% 94.1% | 100.0% 100.0% 98.0% 64.5% | 100.0% 100.0% 99.3% 94.1% |
| Chula Vista, CA | 100.0% 100.0% 93.0% 85.1% | 97.9% 97.7% 95.9% 76.4% | 98.6% 98.6% 96.6% 92.9% |
| Coronado, CA | 100.0% 100.0% 100.0% 98.8% | 95.4% 94.2% 93.6% 54.9% | 96.5% 96.5% 96.5% 94.2% |
| Crest, CA | 100.0% 100.0% 98.6% 91.7% | 100.0% 100.0% 94.5% 85.5% | 100.0% 100.0% 90.3% 77.9% |
| Del Dios, CA | 100.0% 100.0% 77.8% 0.0% | 100.0% 100.0% 0.0% 0.0% | 100.0% 100.0% 88.9% 88.9% |
| Del Mar, CA | 100.0% 100.0% 100.0% 94.9% | 100.0% 100.0% 100.0% 79.5% | 100.0% 100.0% 97.4% 92.3% |
| Descanso, CA | 70.4% 69.7% 35.1% 23.1% | 88.0% 88.0% 55.5% 41.8% | 57.7% 57.7% 40.9% 28.6% |
| Dulzura, CA | 61.0% 59.8% 32.9% 21.9% | 71.8% 71.8% 38.4% 35.9% | 52.3% 52.3% 29.0% 17.1% |
| El Cajon, CA | 100.0% 100.0% 100.0% 98.4% | 99.7% 99.7% 99.0% 70.7% | 100.0% 100.0% 99.4% 96.5% |
| Elfin Forest, CA | 100.0% 100.0% 91.7% 75.0% | 100.0% 100.0% 97.9% 81.3% | 95.8% 95.8% 93.8% 77.1% |
| Encinitas, CA | 100.0% 100.0% 98.0% 88.2% | 99.8% 99.8% 94.1% 71.8% | 99.0% 99.0% 96.1% 83.3% |
| Escondido, CA | 99.1% 99.1% 95.8% 85.9% | 97.9% 97.8% 92.3% 66.9% | 99.3% 99.3% 97.1% 91.4% |
| Eucalyptus Hills, CA | 100.0% 100.0% 94.2% 79.6% | 100.0% 99.0% 98.1% 75.7% | 95.1% 95.1% 86.4% 75.7% |
| Fairbanks Ranch, CA | 100.0% 100.0% 99.1% 90.1% | 100.0% 100.0% 96.4% 73.9% | 100.0% 100.0% 91.9% 82.0% |
| Fallbrook, CA | 100.0% 100.0% 100.0% 89.7% | 97.4% 97.4% 91.6% 85.5% | 100.0% 100.0% 99.5% 88.7% |
| Granite Hills, CA | 100.0% 100.0% 96.7% 93.3% | 98.3% 98.3% 98.3% 71.7% | 100.0% 100.0% 100.0% 93.3% |
| Guatay, CA | 91.9% 91.9% 59.3% 32.0% | 91.3% 91.3% 54.7% 36.0% | 89.0% 89.0% 81.4% 60.5% |
| Harbison Canyon, CA | 100.0% 100.0% 96.3% 85.6% | 100.0% 100.0% 86.6% 72.7% | 99.5% 99.5% 95.4% 85.2% |
| Harmony Grove, CA | 98.5% 98.5% 79.4% 60.3% | 100.0% 100.0% 100.0% 77.9% | 100.0% 100.0% 98.5% 95.6% |
| Hidden Meadows, CA | 100.0% 100.0% 95.8% 83.3% | 94.4% 94.4% 88.2% 75.0% | 99.3% 99.3% 84.0% 64.6% |
| Imperial Beach, CA | 100.0% 100.0% 100.0% 100.0% | 100.0% 100.0% 100.0% 89.0% | 100.0% 100.0% 100.0% 92.3% |
| Jacumba, CA | 81.1% 81.1% 0.0% 0.0% | 68.2% 68.2% 62.9% 52.3% | 88.6% 87.9% 85.6% 67.4% |
| Jamul, CA | 97.3% 97.3% 89.3% 76.8% | 97.5% 97.5% 85.0% 80.1% | 95.4% 95.4% 84.2% 74.3% |
| Julian, CA | 100.0% 100.0% 66.7% 51.8% | 98.2% 98.2% 82.7% 64.3% | 88.7% 88.1% 83.3% 74.4% |
| La Jolla, CA | 100.0% 100.0% 97.6% 85.4% | 100.0% 100.0% 99.2% 70.4% | 99.2% 99.2% 90.5% 72.3% |
| La Mesa, CA | 100.0% 100.0% 99.5% 95.0% | 99.5% 99.5% 99.0% 77.9% | 100.0% 100.0% 71.9% 66.8% |
| La Presa, CA | 100.0% 100.0% 99.2% 92.6% | 100.0% 100.0% 98.3% 67.8% | 100.0% 100.0% 100.0% 100.0% |
| Lake San Marcos, CA | 100.0% 100.0% 100.0% 86.5% | 100.0% 100.0% 100.0% 81.1% | 100.0% 100.0% 100.0% 100.0% |
| Lakeside, CA | 100.0% 100.0% 100.0% 95.3% | 100.0% 100.0% 98.0% 77.0% | 98.0% 98.0% 95.3% 83.1% |
| Lemon Grove, CA | 100.0% 100.0% 100.0% 98.8% | 100.0% 100.0% 100.0% 77.6% | 100.0% 100.0% 100.0% 98.8% |
| Mount Laguna, CA | 97.1% 97.1% 57.1% 28.6% | 100.0% 100.0% 85.7% 85.7% | 100.0% 100.0% 100.0% 100.0% |
| National City, CA | 100.0% 100.0% 100.0% 97.5% | 98.8% 98.8% 98.8% 88.8% | 98.8% 98.8% 98.8% 96.9% |
| Oceanside, CA | 100.0% 100.0% 98.7% 96.5% | 99.8% 99.8% 99.0% 86.2% | 99.8% 99.8% 99.3% 92.5% |
| Pala, CA | 100.0% 100.0% 97.5% 89.1% | 100.0% 100.0% 93.3% 80.7% | 100.0% 100.0% 100.0% 97.5% |
| Palomar Mountain, CA | 66.1% 65.5% 18.2% 5.9% | 78.2% 78.2% 52.7% 42.8% | 55.8% 55.8% 47.7% 34.5% |
| Pauma Valley, CA | 93.8% 93.4% 59.4% 44.2% | 81.5% 81.3% 71.4% 48.9% | 73.9% 73.9% 67.2% 58.3% |
| Pine Valley, CA | 87.3% 86.7% 72.7% 58.7% | 78.7% 78.7% 64.0% 62.0% | 96.0% 96.0% 88.0% 78.7% |
| Potrero, CA | 100.0% 100.0% 0.0% 0.0% | 97.1% 97.1% 0.0% 0.0% | 98.5% 98.5% 94.1% 64.7% |
About The Coverage Data
Coverage and signal estimates are derived by Carrierlytics from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of San Diego County, CA where that carrier has coverage.
If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.