InfoSpace ( INSP) surged 15% late Tuesday after the tech shop beat earnings estimates and raised revenue guidance. For the fourth quarter ended Dec. 31, the Bellevue, Wash., Internet and wireless media company earned $18.9 million, or 50 cents a share, up from the year-ago $9.9 million, or 29 cents a share. Revenue rose to $79.7 million from $39.3 million a year earlier. The figures handily surpassed the Thomson First Call analyst consensus estimate, which called for earnings of 40 cents a share on revenue of $75 million. "The fourth quarter of 2004 continued our trend of strong growth and profitability," said CEO Jim Voelker. "Throughout the year, we improved our market position with strategic acquisitions, broader distribution and new partnerships. We enter 2005 with operating momentum, attractive opportunities and the resources to capitalize on them." Fourth-quarter Search & Directory revenue jumped 66% from a year ago to $47.2 million, while mobile revenue surged to $32.5 million from $9.3 million a year earlier. InfoSpace also boosted first-quarter and 2005 revenue guidance while trimming first-quarter earnings estimates, citing increases in noncash depreciation and amortization expense primarily from the recent mobile acquisitions, as well as tax expense. The company expects to earn 34-35 cents a share on $85 million in revenue for the first quarter, and $1.85 a share on $385 million in revenue for the year. Those figures include 9 cents and 35 cents, respectively, in added costs due to the depreciation and taxes. Wall Street had expected 40 cents in first-quarter earnings on $79 million in revenue, and $1.77 in full-year earnings on $346 million in revenue. Late Tuesday, InfoSpace surged $5.71 to $42.98.