Scheduling Information
For questions pertaining to the Midwest ISO's scheduling system and procedures, please call 317-249-5511 (24-hour scheduling number in Carmel), 317-249-5512 (24-hour telephone number for checkout for all Midwest ISO Control Areas).

Tariff Information
For questions about Midwest ISO Tariff or business rules related to the Tariff and OASIS, please contact the Midwest ISO's 24-hour tariff administration telephone number 317-249-5523. You also can direct e-mail to tariffadministration@midwestiso.org.

IT Help Desk Information
For questions pertaining to trouble accessing the Midwest ISO OASIS (or other IT related problems), please contact the IT Help Desk. Help Desk information is posted on the Midwest ISO's extranet (http://extranet.midwestiso.org). The Help Desk is available on a 24 by 7 basis. You may contact the Help Desk by calling 1-866-626-MISO(6476). Please do not call this number for non-IT related questions. In those instances, please call the Operations Issues Call Center or other appropriate number.

Operations Issues Call Center
For questions relating to any Midwest ISO operations topic, please call 866-296-MISO (6476). This center is available on a 24 by 7 basis.

Customer Registration Information
If you are not yet a customer of the Midwest ISO, you may find information on how to register to become a customer on the Midwest ISO's extranet (http://extranet.midwestiso.org). If you have submitted your registration information and have questions about your status or the registration process, you can send email to register@midwestiso.org.