J2 Global Communications Inc. posted a strong second quarter and held to its full-year guidance, sending shares up 7 percent.

J2 Global reported second-quarter net income of $17 million (33 cents per share) a 31 percent increase from $13 million (26 cents) from the same period a year earlier.

Sales for the Los Angeles-based communications services provider were also up 23 percent to $54 million.

J2 stuck to its initial full-year guidance, saying it still expects full-year earnings of $1.35 cents to $1.45 per share on revenue of $217 million to $229 million.

Shares in J2 closed up 7 percent, or $2.26, to $34.71 in afternoon trading Monday on the Nasdaq.

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