| District of Pennsylvania area codes: 610 | |
|---|---|
| Country | United States |
| State/Province | Pennsylvania |
| Major City | Philadelphia |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 610-386 | Philadelphia | Philadelphia, PA | Tcg New Jersey |
| 610-387 | Delaware | Glen Mills, PA | Tcg New Jersey |
| 610-388 | Delaware | Chadds Ford, PA | Verizon Pennsylvania |
| 610-389 | Montgomery | Norristown, PA | Cellco Partnership DBA Verizon Wireless |
| 610-390 | Lehigh | Allentown, PA | New Cingular Wireless PCS - DC |
| 610-391 | Lehigh | Allentown, PA | Verizon Pennsylvania |
| 610-392 | Lehigh | Allentown, PA | New Cingular Wireless PCS - DC |
| 610-393 | Lehigh | Allentown, PA | New Cingular Wireless PCS - DC |
| 610-394 | Delaware | Lansdowne, PA | Verizon Pennsylvania |
| 610-395 | Lehigh | Allentown, PA | Verizon Pennsylvania |
| 610-396 | Berks | Reading, PA | Verizon Pennsylvania |
| 610-397 | Montgomery | Conshohocken, PA | Verizon Pennsylvania |
| 610-398 | Lehigh | Allentown, PA | Verizon Pennsylvania |
| 610-399 | Chester | West Chester, PA | Verizon Pennsylvania |
| 610-400 | Chester | Coatesville, PA | Core Communications |
| 610-401 | Berks | Reading, PA | AT&T Local |
| 610-402 | Lehigh | Allentown, PA | Ctsi |
| 610-403 | Lehigh | Catasauqua, PA | Service Electric Telephone Company |
| 610-404 | Berks | Birdsboro, PA | Windstream Conestoga |
| 610-405 | Montgomery | Norristown, PA | New Cingular Wireless PCS - DC |
There are 774 prefixes, In the code area, the major cities are Allentown, PA;Bethlehem, PA;Chester, PA;Drexel Hil. The major city is Philadelphia.