| District of Maryland area codes: 443 | |
|---|---|
| Country | United States |
| State/Province | Maryland |
| Major City | Baltimore |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 443-382 | Dorchester | Cambridge, MD | Core Communications |
| 443-383 | Carroll | Westminster, MD | Ctc Communications Corp. |
| 443-384 | Baltimore | Parkville, MD | Cavalier Telephone Mid-atlantic |
| 443-385 | Talbot | Easton, MD | Core Communications |
| 443-386 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 443-387 | Worcester | Pocomoke, MD | Core Communications |
| 443-388 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
| 443-389 | Wicomico | Salisbury, MD | Core Communications |
| 443-390 | Harford | Churchville, MD | Global Crossing Local Services-md |
| 443-391 | Baltimore City | Baltimore, MD | Global Crossing Local Services-md |
| 443-392 | Baltimore City | Baltimore, MD | AT&T Local |
| 443-393 | Baltimore City | Baltimore, MD | Global Crossing Local Services-md |
| 443-394 | Baltimore | Pikesville, MD | Verizon Maryland |
| 443-395 | Harford | Aberdeen, MD | Verizon Maryland |
| 443-396 | Anne Arundel | Odenton, MD | Global Crossing Local Services-md |
| 443-397 | Wicomico | Salisbury, MD | Cellco Partnership DBA Verizon Wireless |
| 443-398 | Carroll | Sykesville, MD | Sprint Spectrum L.p. |
| 443-399 | Baltimore City | Baltimore, MD | Global Crossing Local Services-md |
| 443-400 | Baltimore City | Baltimore, MD | Xo Maryland |
| 443-401 | Baltimore City | Baltimore, MD | Cellco Partnership DBA Verizon Wireless |
There are 781 prefixes, In the code area, the major cities are Annapolis, MD;Arbutus, MD;Arnold, MD;Baltimore, MD. The major city is Baltimore.