Verizon ( VZ) posted strong second-quarter numbers Tuesday, led by another impressive performance in wireless.

For its second quarter ended June 30, the New York telco earned $1.8 billion, or 64 cents a share. That's up from the year-ago $338 million, or 12 cents a share, after a loss on the sale of the company's Iusacell stake. Revenue rose 6% to $17.84 billion. The latest-quarter numbers eased past the Wall Street analyst estimate; the Thomson First Call consensus called for earnings of 60 cents a share on revenue of $17.4 billion.

"Verizon Wireless again extended its industry leadership with another outstanding quarter of profitable growth, including industry-record net customer additions," CEO Ivan Seidenberg said. "We also made headway in offsetting an anticipated decline in traditional wireline revenues with new revenues from broadband DSL, long-distance, data and enterprise services. Our investments in these areas are paying off, as we continue to transform our revenue mix."

The strongest numbers came once again from the company's 55%-owned Verizon Wireless unit. The nation's largest wireless service provider posted 25% revenue growth, hitting $6.8 billion in quarterly revenue, along with a 570-basis-point gain in margins and a company record-low monthly turnover, or churn, rate of 1.45%.

TheStreet.com reported Monday that Verizon Wireless had added 1.54 million subscribers in the second quarter, beating analysts' estimates. Verizon Wireless is a venture of Verizon and British wireless giant Vodafone ( VOD).

The numbers offer the latest evidence that Verizon Wireless has been growing at a rapid clip. The June-quarter numbers surpass the 1.4 million new subscribers the venture added in the first quarter ended in March. Verizon Wireless now has 40.4 million subscribers.

The reduction in churn beats the analyst estimate and comes as the company capitalizes on defections from AT&T Wireless ( AWE) and Cingular, which posted sluggish subscriber gains last week.

Earlier this year, Cingular offered to pay $15 per share for AT&T Wireless in a $41 billion merger the companies expect to close by year-end.

In recent quarters, strong gains at the wireless venture have overshadowed the declines in Verizon's local phone business. Even so, Tuesday's news comes as the regional Bells seem to have scored another win with AT&T's ( T) decision to throw in the towel on the consumer phone game.

Shares of the big local phone giants -- Verizon and rivals SBC ( SBC) and BellSouth ( BLS) -- have risen more than 4% since Thursday in the wake of Ma Bell's residential retreat.

On Tuesday, Verizon said it added 280,000 digital subscriber line, or DSL, fast Internet access customers and posted 15% growth in long-distance revenue. The company has been looking to those services along with wireless to offset the continuing erosion of its local phone base. The company also said operating margins rose to 21% from 16% a year earlier.

Early Tuesday, the stock rose 49 cents to $36.99.