URL:  www.dexknows.com
Year Launched:  2003
Reputation Impact Rating: Med-High
Alexa Rank:   1,030 US
SEO Benefit:  Yes
Advertising Options: Yes
Claim Listing: Yes

Dex has been in advertising not just for decades, but for generations. This means that they have experience and longevity in the industry. Their product line includes print, web, mobile apps, reputation management and video. These services allow them reach the largest customer base for their clients.

As described on Wikipedia.

Dex One Corporation provides online, mobile and print search marketing via their DexKnows.com website, print yellow pages directories and pay-per-click ad networks in the U.S.

From Alexa

There are 5,199 sites with a better three-month global Alexa traffic rank than Dexknows.com. It is particularly popular among users in the cities of Denver (where it is ranked #291) and Salt Lake City (#319). Compared with the overall internet population, the site’s users are disproportionately Caucasian, and they tend to be women over the age of 45 who have no postgraduate education and have incomes over $30,000. The fraction of visits to the site referred by search engines is about 28%, and approximately 53% of visits to Dexknows.com consist of only one pageview.

History as found on Wikipedia

Dex One Corporation was formed in February 2010. It was previously the R. H. Donnelley Company, which was founded in 1886 by Reuben H. Donnelley, son of RR Donnelley founder Richard R. Donnelley, as The Chicago Directory Company. Donnelley primarily contracted with The Chicago Telephone Company to publish telephone directories for Chicago Telephone customers. In 1906, however, Donnelley would venture outside Chicago, contracting with Bell System firms such as New York Telephone, Wisconsin Telephone, and Cincinnati Suburban Telephone Co.

In 1917, The Reuben H. Donnelley Company was incorporated and moved to New York City, retaining some offices in Chicago. In 1925, Donnelley died, leaving behind his company which continued to contract with the Bell System to publish telephone directories.

In 1961, Dun & Bradstreet Corp merged with R.H. Donnelley with R.H. Donnelley becoming a wholly owned subsidiary.