| ZIP Code | Verizon | ATT | T-Mobile | 
|---|---|---|---|
| 20777 | 99% | 100% | 100% | 
| Licensee | Address | Height | Tower Type | 
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 14030 Highland Rd, Highland, MD 20777 | 72.2 | MAST | 
| NEW CINGULAR WIRELESS PCS, LLC | 13454 Clarksville Pike, Highland, MD 20777 | 49.4 | POLE | 
| Carrier | Address | Comment | Date Added | 
|---|---|---|---|
| T-Mobile | Building 2, New Hampshire Ave | Dead zone for T-mobile indoors by a window. At best I can get an edge data connection. If you work at FDA, get Verizon. | 2014 | 
| Verizon | 2640 Queensland Dr | Very weak signal, drops calls | 2019 | 
| Verizon | 2844 Country Ln | Calls cut out | 2015 | 
| Sprint | 10903 New Hampshire Ave | Dead zone entire rear of FDA campus | 2019 | 
| Verizon | 9345 Millbrook Rd | lots of dropped calls. Never have more that one bar on my phone at any given time. Even walking outside does not eliminate the problem. Very frustrating | 2015 | 
| Carrier | Address | Phone | Directions | 
|---|---|---|---|
| AT&T | 10300 Little Patuxent Parkway, Columbia, MD, 21044 | 410-715-9448 | Directions | 
| Verizon | 15610 Old Columbia Pike, Burtonsville, MD, 20866 | 301-421-1121 | Directions | 
| T-Mobile | 15428 New Hampshire Ave #9, Silver Spring, MD, 20905 | 240-560-6056 | Directions |