| District of Maryland area codes: 410 | |
|---|---|
| Country | United States |
| State/Province | Maryland |
| Major City | Baltimore |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 410-242 | Baltimore | Arbutus, MD | Verizon Maryland |
| 410-243 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-244 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-245 | Baltimore | Catonsville, MD | New Cingular Wireless PCS - DC |
| 410-246 | Baltimore City | Baltimore, MD | Mci Worldcom Communications |
| 410-247 | Baltimore | Arbutus, MD | Verizon Maryland |
| 410-248 | Baltimore | Parkville, MD | Verizon Maryland |
| 410-249 | Baltimore | Towson, MD | Verizon Maryland |
| 410-250 | Worcester | Ocean City, MD | Verizon Maryland |
| 410-251 | Wicomico | Salisbury, MD | Cellco Partnership DBA Verizon Wireless |
| 410-252 | Baltimore | Towson, MD | Verizon Maryland |
| 410-253 | Talbot | Easton, MD | New Cingular Wireless PCS - DC |
| 410-254 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-255 | Anne Arundel | Pasadena, MD | Verizon Maryland |
| 410-256 | Baltimore | Parkville, MD | Verizon Maryland |
| 410-257 | Calvert | North Beach, MD | Verizon Maryland |
| 410-258 | Anne Arundel | Baltimore, MD | Sprint Spectrum L.p. |
| 410-259 | Carroll | Westminster, MD | Cellco Partnership DBA Verizon Wireless |
| 410-260 | Anne Arundel | Annapolis, MD | Verizon Maryland |
| 410-261 | Baltimore City | Baltimore, MD | Verizon Maryland |
There are 783 prefixes, In the code area, the major cities are Annapolis, MD;Arbutus, MD;Arnold, MD;Baltimore, MD. The major city is Baltimore.