| 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 |
|---|---|---|---|
| 410-282 | Baltimore | Dundalk, MD | Verizon Maryland |
| 410-283 | Baltimore | Towson, MD | Usa Mobility Wireless |
| 410-284 | Baltimore | Dundalk, MD | Verizon Maryland |
| 410-285 | Baltimore | Dundalk, MD | Verizon Maryland |
| 410-286 | Calvert | North Beach, MD | Verizon Maryland |
| 410-287 | Cecil | North East, MD | Verizon Maryland |
| 410-288 | Baltimore | Dundalk, MD | Verizon Maryland |
| 410-289 | Worcester | Ocean City, MD | Verizon Maryland |
| 410-290 | Howard | Columbia, MD | Verizon Maryland |
| 410-291 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-292 | Baltimore | Catonsville, MD | New Cingular Wireless PCS - DC |
| 410-293 | Anne Arundel | Annapolis, MD | Paetec Communications |
| 410-294 | Baltimore | Catonsville, MD | New Cingular Wireless PCS - DC |
| 410-295 | Anne Arundel | Annapolis, MD | Verizon Maryland |
| 410-296 | Baltimore | Towson, MD | Verizon Maryland |
| 410-297 | Harford | Aberdeen, MD | Verizon Maryland |
| 410-298 | Baltimore | Woodlawn, MD | Verizon Maryland |
| 410-299 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 410-300 | Howard | Elkridge, MD | Sprint Spectrum L.p. |
| 410-301 | Baltimore City | Baltimore, MD | Sprint Spectrum L.p. |
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.