Ingenio is extending its pay-per-call ad network by partnering with search and directory publisher InfoSpace, which processes some 300 million consumer queries a month; it is also providing pay-per-call ads to free (ad-supported) phone directory assistance service 1-800-FREE411, owned by Jingle Networks, reports ClickZ. Ingenio ads will appear on InfoSpace directories and partner sites as well as cell phones.

"Our network has started to grow on the pay-per-call side, and that's accelerating," said Marc Barach, Ingenio's chief marketing officer. "By this time next year, we're very confident that every search engine and directory will be engaged in one way or another with pay per call."