Phone & Fax Numbers 
 
 
Call before you dig
Service:   Phone Number:
Call before you dig!   811
Hearing Impaired   711
Investor Services   800.255.2237
Economic Development   800.981.9409
    
    
    
   
Ameren Illinois: Ameren Missouri:
Residential Customer Service Phone: 800.755.5000 Residential Customer Service Phone: 800.552.7583
  8:00 a.m. - 4:30 p.m. Fax 800.851.1796 7:00 a.m. - 7:00 p.m. Fax: 866.297.8054
                 
Business Customer Service Phone: 800.232.2477 Business Customer Service Phone: 800.552.7583
  8:00 a.m. - 4:30 p.m. Fax: 877.263.7369   7:00 a.m. - 5:30 p.m. Fax: 866.222.3471
                 
See additional Ameren Illinois contact information. See additional Ameren Missouri contact information.
               
Customer service, customer phone numbers, contact us, phone numbers, fax numbers, phone numbers
 
 
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