As of 2015, Ameren provides electric to the states of Illinois and Missouri, and the company has offices in the cities of St. Louis, Peoria and Chicago. Residents of both states can visit the Ameren website to pay bills online, view bills and payment history, and find company contact information.
The corporate website for Ameren has links to its Missouri and Illinois branch websites, which residents of each state can use to find service information for their specific regions. Residents first go to the corporate website and then click on the Ameren Missouri or the Ameren Illinois buttons on the homepage to visit their state's page.
Once on the Missouri or Illinois page, the website provides green tabs titled Pay Online Now, View My Bill, View Payment History, View Outage Center and Save Money and Energy. Customers with personal accounts can take advantage of these services online. Additional features on the Missouri page include a link to an online Customer Service Center, information on the company's environmental philosophy and operations, and energy assistance options for low-income customers. Additional features on the Illinois page are links to an outage center, information on Gas Choice and Electric Choice, and information on infrastructure improvements.