| ZIP Code | Verizon | ATT | T-Mobile | 
|---|---|---|---|
| 20841 | 100% | 100% | 100% | 
| Licensee | Address | Height | Tower Type | 
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 26525 Mullinix Mill Rd, Mt Airy, MD 21771 | 45.7 | UPOLE | 
| New Cingular Wireless PCS, LLC | 11030-11038 Fingerboard Rd, Monrovia, MD 21770 | 114.9 | MAST | 
| Cellco Partnership | 17851 Lochness Cir, Olney, MD 20832 | 37.2 | TANK | 
| NEW CINGULAR WIRELESS PCS, LLC | 22409 MD-97, Brookeville, MD 20833 | 44.2 | UPOLE | 
| New Cingular Wireless PCS, LLC | 12838 Old National Pike, Mt Airy, MD 21771 | 76.5 | MAST | 
| Carrier | Address | Comment | Date Added | 
|---|---|---|---|
| T-Mobile | 2 Blue Hosta Way | Bars drop to 1 or complete loss of connection for about 3 minutes. | 2015 | 
| Verizon | 4096 Hipsley Mill Rd | No voice or 4g | 2016 | 
| Sprint | 4313 Sir Walter Rd | Poor signal, works (barely) on upper level of the house and outside, but not on the ground floor. | 2014 | 
| Verizon | 5720 Fishers Ln | Terrible coverage. Outside is marginal, inside is nonexistent. | 2019 | 
| Verizon | 9908 Carmelita Dr | Dead Zone for Verizon Wireless | 2019 | 
| Carrier | Address | Phone | Directions | 
|---|---|---|---|
| AT&T | 20934 Frederick Rd Suite B1c, Germantown, MD, 20876 | 301-353-8810 | Directions | 
| Verizon | 21040 Frederick Rd, Germantown, MD, 20876 | 301-515-2300 | Directions | 
| T-Mobile | 20640 Seneca Meadows Pkwy Suite D-4, Germantown, MD, 20876 | 240-261-4799 | Directions |