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R. H. Donnelley Publishing & Advertising of Illinois Partnership is a division of R. H. Donnelley that publishes directories in Illinois and northwest Indiana under the AT&T Real Yellow Pages Published by Dex name.
It began as DonTech Partnership in 1984 following the Bell System Divestiture. Ameritech's directories for Illinois Bell customers were placed in the partnership, with some Indiana Bell areas mixed in, while Ameritech's directory operations in its other states were published by Ameritech Publishing. The partnership continued through Ameritech's acquisition by SBC Communications, until 2004, when R. H. Donnelley took full control of the partnership.
