| ZIP Code | Verizon | ATT | T-Mobile | 
|---|---|---|---|
| 21734 | 100% | 100% | 100% | 
| Licensee | Address | Height | Tower Type | 
|---|---|---|---|
| USCOC OF CUMBERLAND, LLC | 5103 Red Hill Rd, Keedysville, MD 21756 | 48.8 | TOWER | 
| New Cingular Wireless PCS, LLC | 126 W High St, Sharpsburg, MD 21782 | 50.9 | TANK | 
| USCOC OF CUMBERLAND, LLC | 13413 Pen Mar High Rock Rd, Highfield-Cascade, MD 21719 | 54.9 | TOWER | 
| New Cingular Wireless PCS, LLC | 9500 Gambrill Park Rd, Frederick, MD 21702 | 61 | MAST | 
| Cellco Partnership | 9301 Gambrill Park Rd, Frederick, MD 21702 | 45.7 | 
| Carrier | Address | Comment | Date Added | 
|---|---|---|---|
| T-Mobile | MD-77 | Catoctin park is generally a dead zone, except on hillside facing Thurmont. Would like to get an AT&T or T-Mobile cell tower somewhere on the high hills here. Would like to have the campgrounds and waterfalls covered. | 2019 | 
| 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 | 
| AT&T | 7969 Parkland Pl | poor to no signal on AT&T | 2015 | 
| Verizon | I-70 | No 4G service or voice | 2019 | 
| Verizon | 11456 Keymar Rd | Spotty coverage, lots of dropped calls. Emails & text messages are more reliable, but even they may take some time to go through. | 2015 | 
| Carrier | Address | Phone | Directions | 
|---|---|---|---|
| AT&T | 1640 Dual Highway Suite A, Hagerstown, MD, 21740 | 301-745-6476 | Directions | 
| Verizon | 231 Eastern Blvd N, Hagerstown, MD, 21740 | 240-707-6790 | Directions | 
| T-Mobile | 17301 Valley Mall Rd 0546, Hagerstown, MD, 21740 | 240-513-6262 | Directions |