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Phone & Fax Numbers 
 

Residential Customer Service

Phone:

800.755.5000

7:00 a.m. - 7:00 p.m. (M-F)

Fax:

800.851.1796
      

Business Customer Service

Phone: 800.232.2477
7:00 a.m. - 7:00 p.m. (M-F) Fax: 877.263.7369
      

Construction & Engineering Services

Phone: 888.659.4540
7:30 a.m. - 5:00 p.m. (M-F) Fax: 217.424.6758
                     Online Application: Residential Construction
  Comm. & Ind. Construction
      

Website Support

Phone: 877.263.7361
7:00 a.m. - 7:00 p.m. (M-F)
7:00 a.m. - 3:30 p.m. (Sat.-Sun.)
      

Call before you dig!

Phone: 811
      

Hearing Impaired

Phone: 711
 
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Ameren Illinois, phone and fax numbers, construction hotline, customer service phone numbers, website support
 
 
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