Coverage rankings for San Diego County, CA
T-Mobile currently ranks first for coverage in this area, with a coverage score of 70.2. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.
| Rank | Carrier | Score | Overall | 4G LTE | 5G | Fast 5G | Average Signal |
|---|---|---|---|---|---|---|---|
| 1 | T-Mobile | 70.2 | 71.7% | 71.6% | 59.4% | 45.9% | -90 dBm |
| 2 | Verizon | 66.5 | 77.7% | 77.0% | 50.6% | 37.3% | -100 dBm |
| 3 | AT&T | 62.2 | 73.4% | 73.3% | 50.7% | 39.5% | -111 dBm |
Scores include coverage area, network type, and average signal strength.
Cell phone coverage map for San Diego County, CA
Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.
Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.
Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Compare Wireless Carriers.
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Cell phone coverage by network in San Diego County, CA
#1
T-Mobile
Coverage Score 70.2
In San Diego County, CA
- Overall
- 71.7%
- 4G LTE
- 71.6%
- 5G
- 59.4%
- Fast 5G
- 45.9%
Average Signal -90 dBm
#2
Verizon
Coverage Score 66.5
In San Diego County, CA
- Overall
- 77.7%
- 4G LTE
- 77.0%
- 5G
- 50.6%
- Fast 5G
- 37.3%
Average Signal -100 dBm
#3
AT&T
Coverage Score 62.2
In San Diego County, CA
- Overall
- 73.4%
- 4G LTE
- 73.3%
- 5G
- 50.7%
- Fast 5G
- 39.5%
Average Signal -111 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% -99 dBm | 82.4% 82.4% 61.0% 51.5% -111 dBm | 92.0% 92.0% 78.6% 54.4% -93 dBm |
| Bonita, CA | 100.0% 100.0% 99.0% 94.3% -87 dBm | 100.0% 100.0% 99.0% 80.0% -101 dBm | 100.0% 100.0% 100.0% 97.1% -83 dBm |
| Bonsall, CA | 100.0% 100.0% 98.7% 83.9% -97 dBm | 100.0% 100.0% 98.7% 88.3% -102 dBm | 100.0% 100.0% 97.0% 86.6% -84 dBm |
| Borrego Springs, CA | 99.8% 99.8% 94.2% 89.0% -93 dBm | 95.5% 95.5% 78.5% 77.6% -114 dBm | 1.5% 1.5% 0.1% 0.0% -101 dBm |
| Bostonia, CA | 100.0% 100.0% 100.0% 100.0% -80 dBm | 100.0% 100.0% 100.0% 87.5% -96 dBm | 100.0% 100.0% 100.0% 100.0% -78 dBm |
| Boulevard, CA | 100.0% 100.0% 77.1% 48.2% -103 dBm | 94.0% 94.0% 67.5% 62.7% -111 dBm | 100.0% 100.0% 100.0% 84.3% -87 dBm |
| Camp Pendleton, CA | 88.7% 88.4% 30.9% 12.7% -100 dBm | 81.7% 81.1% 56.1% 43.6% -112 dBm | 76.0% 76.0% 39.4% 23.5% -94 dBm |
| Camp Pendleton Mainside, CA | 99.6% 99.6% 85.2% 60.0% -95 dBm | 96.5% 96.5% 53.0% 42.6% -108 dBm | 99.6% 99.6% 44.8% 34.8% -86 dBm |
| Camp Pendleton South, CA | 100.0% 100.0% 86.6% 80.5% -86 dBm | 98.7% 98.7% 96.6% 79.9% -99 dBm | 98.7% 98.7% 96.0% 84.6% -84 dBm |
| Campo, CA | 93.7% 93.3% 60.8% 47.0% -98 dBm | 94.9% 94.9% 78.0% 64.0% -107 dBm | 84.1% 84.1% 70.1% 45.5% -93 dBm |
| Cardiff By The Sea, CA | 100.0% 100.0% 98.0% 83.7% -91 dBm | 100.0% 100.0% 100.0% 77.6% -112 dBm | 100.0% 100.0% 100.0% 91.8% -83 dBm |
| Carlsbad, CA | 100.0% 100.0% 96.9% 88.8% -86 dBm | 99.8% 99.8% 99.3% 70.1% -104 dBm | 99.9% 99.9% 97.7% 87.3% -84 dBm |
| Casa de Oro-Mount Helix, CA | 100.0% 100.0% 100.0% 94.1% -93 dBm | 100.0% 100.0% 98.0% 64.5% -105 dBm | 100.0% 100.0% 99.3% 94.1% -83 dBm |
| Chula Vista, CA | 100.0% 100.0% 93.0% 85.1% -90 dBm | 97.9% 97.7% 95.9% 76.4% -101 dBm | 98.6% 98.6% 96.6% 92.9% -80 dBm |
| Coronado, CA | 100.0% 100.0% 100.0% 98.8% -88 dBm | 95.4% 94.2% 93.6% 54.9% -102 dBm | 96.5% 96.5% 96.5% 94.2% -78 dBm |
| Crest, CA | 100.0% 100.0% 98.6% 91.7% -95 dBm | 100.0% 100.0% 94.5% 85.5% -103 dBm | 100.0% 100.0% 90.3% 77.9% -86 dBm |
| Del Dios, CA | 100.0% 100.0% 77.8% 0.0% -109 dBm | 100.0% 100.0% 0.0% 0.0% -90 dBm | 100.0% 100.0% 88.9% 88.9% -83 dBm |
| Del Mar, CA | 100.0% 100.0% 100.0% 94.9% -83 dBm | 100.0% 100.0% 100.0% 79.5% -93 dBm | 100.0% 100.0% 97.4% 92.3% -79 dBm |
| Descanso, CA | 70.4% 69.7% 35.1% 23.1% -104 dBm | 88.0% 88.0% 55.5% 41.8% -110 dBm | 57.7% 57.7% 40.9% 28.6% -95 dBm |
| Dulzura, CA | 61.0% 59.8% 32.9% 21.9% -105 dBm | 71.8% 71.8% 38.4% 35.9% -112 dBm | 52.3% 52.3% 29.0% 17.1% -98 dBm |
| El Cajon, CA | 100.0% 100.0% 100.0% 98.4% -84 dBm | 99.7% 99.7% 99.0% 70.7% -97 dBm | 100.0% 100.0% 99.4% 96.5% -78 dBm |
| Elfin Forest, CA | 100.0% 100.0% 91.7% 75.0% -103 dBm | 100.0% 100.0% 97.9% 81.3% -101 dBm | 95.8% 95.8% 93.8% 77.1% -88 dBm |
| Encinitas, CA | 100.0% 100.0% 98.0% 88.2% -91 dBm | 99.8% 99.8% 94.1% 71.8% -106 dBm | 99.0% 99.0% 96.1% 83.3% -85 dBm |
| Escondido, CA | 99.1% 99.1% 95.8% 85.9% -93 dBm | 97.9% 97.8% 92.3% 66.9% -105 dBm | 99.3% 99.3% 97.1% 91.4% -83 dBm |
| Eucalyptus Hills, CA | 100.0% 100.0% 94.2% 79.6% -98 dBm | 100.0% 99.0% 98.1% 75.7% -109 dBm | 95.1% 95.1% 86.4% 75.7% -85 dBm |
| Fairbanks Ranch, CA | 100.0% 100.0% 99.1% 90.1% -93 dBm | 100.0% 100.0% 96.4% 73.9% -110 dBm | 100.0% 100.0% 91.9% 82.0% -85 dBm |
| Fallbrook, CA | 100.0% 100.0% 100.0% 89.7% -93 dBm | 97.4% 97.4% 91.6% 85.5% -104 dBm | 100.0% 100.0% 99.5% 88.7% -84 dBm |
| Granite Hills, CA | 100.0% 100.0% 96.7% 93.3% -90 dBm | 98.3% 98.3% 98.3% 71.7% -102 dBm | 100.0% 100.0% 100.0% 93.3% -84 dBm |
| Guatay, CA | 91.9% 91.9% 59.3% 32.0% -105 dBm | 91.3% 91.3% 54.7% 36.0% -115 dBm | 89.0% 89.0% 81.4% 60.5% -91 dBm |
| Harbison Canyon, CA | 100.0% 100.0% 96.3% 85.6% -99 dBm | 100.0% 100.0% 86.6% 72.7% -106 dBm | 99.5% 99.5% 95.4% 85.2% -84 dBm |
| Harmony Grove, CA | 98.5% 98.5% 79.4% 60.3% -103 dBm | 100.0% 100.0% 100.0% 77.9% -105 dBm | 100.0% 100.0% 98.5% 95.6% -80 dBm |
| Hidden Meadows, CA | 100.0% 100.0% 95.8% 83.3% -93 dBm | 94.4% 94.4% 88.2% 75.0% -105 dBm | 99.3% 99.3% 84.0% 64.6% -90 dBm |
| Imperial Beach, CA | 100.0% 100.0% 100.0% 100.0% -90 dBm | 100.0% 100.0% 100.0% 89.0% -99 dBm | 100.0% 100.0% 100.0% 92.3% -85 dBm |
| Jacumba, CA | 81.1% 81.1% 0.0% 0.0% -113 dBm | 68.2% 68.2% 62.9% 52.3% -104 dBm | 88.6% 87.9% 85.6% 67.4% -90 dBm |
| Jamul, CA | 97.3% 97.3% 89.3% 76.8% -96 dBm | 97.5% 97.5% 85.0% 80.1% -105 dBm | 95.4% 95.4% 84.2% 74.3% -86 dBm |
| Julian, CA | 100.0% 100.0% 66.7% 51.8% -97 dBm | 98.2% 98.2% 82.7% 64.3% -111 dBm | 88.7% 88.1% 83.3% 74.4% -82 dBm |
| La Jolla, CA | 100.0% 100.0% 97.6% 85.4% -91 dBm | 100.0% 100.0% 99.2% 70.4% -102 dBm | 99.2% 99.2% 90.5% 72.3% -87 dBm |
| La Mesa, CA | 100.0% 100.0% 99.5% 95.0% -88 dBm | 99.5% 99.5% 99.0% 77.9% -98 dBm | 100.0% 100.0% 71.9% 66.8% -81 dBm |
| La Presa, CA | 100.0% 100.0% 99.2% 92.6% -91 dBm | 100.0% 100.0% 98.3% 67.8% -104 dBm | 100.0% 100.0% 100.0% 100.0% -80 dBm |
| Lake San Marcos, CA | 100.0% 100.0% 100.0% 86.5% -93 dBm | 100.0% 100.0% 100.0% 81.1% -107 dBm | 100.0% 100.0% 100.0% 100.0% -77 dBm |
| Lakeside, CA | 100.0% 100.0% 100.0% 95.3% -90 dBm | 100.0% 100.0% 98.0% 77.0% -108 dBm | 98.0% 98.0% 95.3% 83.1% -85 dBm |
| Lemon Grove, CA | 100.0% 100.0% 100.0% 98.8% -83 dBm | 100.0% 100.0% 100.0% 77.6% -102 dBm | 100.0% 100.0% 100.0% 98.8% -79 dBm |
| Mount Laguna, CA | 97.1% 97.1% 57.1% 28.6% -106 dBm | 100.0% 100.0% 85.7% 85.7% -111 dBm | 100.0% 100.0% 100.0% 100.0% -79 dBm |
| National City, CA | 100.0% 100.0% 100.0% 97.5% -86 dBm | 98.8% 98.8% 98.8% 88.8% -95 dBm | 98.8% 98.8% 98.8% 96.9% -75 dBm |
| Oceanside, CA | 100.0% 100.0% 98.7% 96.5% -84 dBm | 99.8% 99.8% 99.0% 86.2% -101 dBm | 99.8% 99.8% 99.3% 92.5% -83 dBm |
| Pala, CA | 100.0% 100.0% 97.5% 89.1% -103 dBm | 100.0% 100.0% 93.3% 80.7% -103 dBm | 100.0% 100.0% 100.0% 97.5% -78 dBm |
| Palomar Mountain, CA | 66.1% 65.5% 18.2% 5.9% -106 dBm | 78.2% 78.2% 52.7% 42.8% -117 dBm | 55.8% 55.8% 47.7% 34.5% -94 dBm |
| Pauma Valley, CA | 93.8% 93.4% 59.4% 44.2% -102 dBm | 81.5% 81.3% 71.4% 48.9% -112 dBm | 73.9% 73.9% 67.2% 58.3% -86 dBm |
| Pine Valley, CA | 87.3% 86.7% 72.7% 58.7% -100 dBm | 78.7% 78.7% 64.0% 62.0% -113 dBm | 96.0% 96.0% 88.0% 78.7% -84 dBm |
| Potrero, CA | 100.0% 100.0% 0.0% 0.0% -103 dBm | 97.1% 97.1% 0.0% 0.0% -95 dBm | 98.5% 98.5% 94.1% 64.7% -92 dBm |
About The Coverage Data
Coverage and signal estimates are derived by Compare Wireless Carriers 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.