Union City City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 201 | US | New Jersey - NJ | Union City | Eastern | Details |
| 405 | US | Oklahoma - OK | Union City | Central | Details |
| 510 | US | California - CA | Union City | Pacific | Details |
| 517 | US | Michigan - MI | Union City | Eastern | Details |
| 551 | US | New Jersey - NJ | Union City | Eastern | Details |
| 731 | US | Tennessee - TN | Union City | Central | Details |
| 765 | US | Indiana - IN | Union City | Eastern | Details |
| 814 | US | Pennsylvania - PA | Union City | Eastern | Details |
| 937 | US | Ohio - OH | Union City | Eastern | Details |