| 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 |
|---|---|---|---|
| 410-200 | Talbot | Easton, MD | Mci Worldcom Communications |
| 410-202 | Wicomico | Salisbury, MD | Cellco Partnership DBA Verizon Wireless |
| 410-203 | Howard | Ellicott City, MD | Verizon Maryland |
| 410-204 | Baltimore | Arbutus, MD | Verizon Maryland |
| 410-205 | Baltimore | Baltimore, MD | Verizon Maryland |
| 410-206 | Baltimore | Catonsville, MD | New Cingular Wireless PCS - DC |
| 410-207 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 410-208 | Worcester | Berlin, MD | Verizon Maryland |
| 410-209 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-210 | Wicomico | Salisbury, MD | Aquis Communications |
| 410-212 | Anne Arundel | Annapolis, MD | Sprint Spectrum L.p. |
| 410-213 | Worcester | Ocean City, MD | Verizon Maryland |
| 410-214 | Cecil | Rising Sun, MD | Core Communications |
| 410-215 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 410-216 | Anne Arundel | Annapolis, MD | Verizon Maryland |
| 410-217 | Baltimore City | Baltimore, MD | Verizon Maryland |
| 410-218 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 410-219 | Wicomico | Salisbury, MD | Verizon Maryland |
| 410-220 | Howard | Elkridge, MD | Sprint Spectrum L.p. |
| 410-221 | Dorchester | Cambridge, 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.