Area Codes
| 219 | Indiana Northwestern (Chesterton, Crown Point, Gary, Hammond, Hobart, Merrillville, Michigan City, Portage, Valparaiso) | More information at: Area Code 219 Phone Number Blocks
| 219 | Indiana Northwestern (Chesterton, Crown Point, Gary, Hammond, Hobart, Merrillville, Michigan City, Portage, Valparaiso) | More information at: Area Code 219 Phone Number Blocks