| District of Indiana area codes: 219 | |
|---|---|
| Country | United States |
| State/Province | Indiana |
| Major City | Valparaiso |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 219-321 | Lake | Gary, IN | Sprint Spectrum L.p. |
| 219-322 | Lake | Dyer, IN | Ameritech Indiana |
| 219-323 | Lake | Crown Point, IN | T-mobile Usa |
| 219-324 | La Porte | La Porte, IN | Frontier North |
| 219-325 | La Porte | La Porte, IN | Frontier North |
| 219-326 | La Porte | La Porte, IN | Frontier North |
| 219-330 | Starke | San Pierre, IN | Fbn Indiana-in |
| 219-331 | Porter | Portage, IN | Sprint Spectrum L.p. |
| 219-335 | Pulaski | Francesville, IN | Fbn Indiana-in |
| 219-344 | La Porte | La Porte, IN | Cellco Partnership DBA Verizon Wireless |
| 219-345 | Newton | Lake Village, IN | Northwestern Indiana Telephone Co. |
| 219-354 | Lake | East Chicago, IN | First Communications LLC |
| 219-359 | Lake | Gary, IN | T-mobile Usa |
| 219-362 | La Porte | La Porte, IN | Frontier North |
| 219-363 | La Porte | La Porte, IN | Cellco Partnership DBA Verizon Wireless |
| 219-364 | Porter | Valparaiso, IN | Frontier North |
| 219-365 | Lake | St John, IN | Ameritech Indiana |
| 219-369 | La Porte | La Porte, IN | Frontier North |
| 219-370 | Lake | Whiting, IN | Bandwidth.com Clec |
| 219-374 | Lake | Cedar Lake, IN | Ameritech Indiana |
There are 348 prefixes, In the code area, the major cities are East Chicago, IN;Gary, IN;Hammond, IN;Highland, IN. The major city is Valparaiso.