| ZIP Code | Verizon | ATT | T-Mobile | 
|---|---|---|---|
| 21790 | 100% | 100% | 100% | 
| Licensee | Address | Height | Tower Type | 
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 13201 Lewisdale Rd, Clarksburg, MD 20871 | 56.4 | POLE | 
| New Cingular Wireless PCS, LLC | 11030-11038 Fingerboard Rd, Monrovia, MD 21770 | 114.9 | MAST | 
| NEW CINGULAR WIRELESS PCS, LLC | 10308 Lewis Dr, Damascus, MD 20872 | 62.2 | POLE | 
| New Cingular Wireless PCS, LLC | 3204 Gapland Rd, Rohrersville, MD 21779 | 32 | POLE | 
| Cellco Partnership | 26131 Ridge Rd, Damascus, MD 20872 | 77.1 | TOWER | 
| Carrier | Address | Comment | Date Added | 
|---|---|---|---|
| Verizon | 7847 Jackson Mountain Dr | No 4G signal, very limited 3G signal, very limited cellular signal. Many calls to Verizon have only yielded them telling me to purchase a network extender for $250, and they are still unsure if that will work. Different explanations from Verizon - advised this is a extended service area and a no service area. They are still happy to take my money though! | 2014 | 
| Verizon | 14201 Seneca Rd | Had three bars for long time. down to 1 most of the time dring last 3 weeks.. email sent not going through. | 2015 | 
| AT&T | 7969 Parkland Pl | poor to no signal on AT&T | 2015 | 
| Verizon | 15300 Kwanzan Ct | 2bars maximum | 2019 | 
| AT&T | 708 Quince Orchard Rd | in the last two weeks we have completely lost signal in the building full signal outside of the building but no signal in the building. | 2019 | 
| Carrier | Address | Phone | Directions | 
|---|---|---|---|
| AT&T | 5509 Urbana Pike, Frederick, MD, 21704 | 301-682-5766 | Directions | 
| Verizon | 3521 John Simmons St, Frederick, MD, 21704 | 240-608-2100 | Directions | 
| T-Mobile | 5500 Buckeystown Pike K-7, Frederick, MD, 21703 | 301-620-2400 | Directions |