|Information about NXX prefix 923|
|Interactive map of Union, Illinois|
|Telephone Company||Ameritech Illinois|
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Illinois is serviced by area code 815 and the local prefix 923 covers Union. For specific questions about numbers within 815-923, you may want to contact Ameritech Illinois directly.
This is a list of phone prefixes assigned to each company. The prefixes shown are for area code 815 only. Additionally, the list is limited to showing cities around the Union Illinois area.
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