Netflix Inc., the top stock in the S&P 500 this year, said its Internet TV service grew to 65.6 million subscribers in the second quarter, thanks to popular original shows such as “Daredevil” and “Orange Is the New Black.”

The strongest growth was in international markets, where subscribers jumped 2.37 million to 23.3 million, the company said Wednesday on its website. That beat the 1.94 million average of five analysts’ estimates compiled by Bloomberg News. Domestic subscribers grew by 900,000 to a total of 42.3 million, beating estimates of 636,000.

The results highlight Netflix’s progress in building the first global Internet TV channel, fueled by new shows such as “Daredevil,” its first program with Walt Disney Co.’s Marvel Studios, and “Sense8,” created by the directors of “The Matrix.” Spending on films and TV shows will exceed $6 billion next year, the company said.

“Netflix is a subscriber momentum story,” said Paul Sweeney, a Bloomberg Intelligence analyst. “As long as the company continues to add subscribers domestically and internationally, the bulls will be happy. The second-quarter results and third-quarter outlook show” continued subscriber growth momentum.

Netflix, which split 7-for-1 Wednesday, rose 9.5 percent to $107.50 in extended trading after results were announced. The shares fell 2.2 percent to $98.13 at the close in New York and have doubled this year.

Global Expansion

Netflix, based in Los Gatos, California, had its biggest-ever release of new original shows in the quarter.

The company expanded to New Zealand and Australia in March, and will offer its service in Japan, Spain, Italy and Portugal later this year. International subscribers now account for 31 percent of Netflix’s streaming revenue, and the company said it’s profitable in several of the foreign territories where it first offered service.

Growth in Japan will be slow at first, Chief Executive Officer Reed Hastings said on a conference call with analysts. It has the potential to be one of the service’s best markets in the long run, he said.

“When Japanese society embraces a brand, it’s a very deep connection,” Hastings said. Netflix will avoid some of the early struggles rival streaming service Hulu had in Japan by keeping prices low and offering more localized video.