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port six three one
Photo by Cyndi Murray | Port Six Three One restaurant will open its doors Thursday August 1 in Southold.

Add two more businesses to the list of new restaurants opening on the North Fork this year.

In Southold Port Six Three One takes over the space occupied years ago by the Sea Shell restaurant and most recently home to a steak house. In Greenport, Tony’s Asian Fusion is expanding to a second North Fork location.

While their menus are worlds apart, the reason the two new eateries are opening are similar.

“We fell in love with the area,” said Port Six Three One co-owner and head chef Kalergis Dellaportas. Two months ago, Mr. Dellaportas and his parents, Archie and Patricia, purchased the Main Road property with plans to create a bistro-style restaurant with a upbeat vibe.

port six three one
Photo by Cyndi Murray | Port Six Three One co-owner and head chef Kalergis Dellaportas.

Mr. Dellaportas, who trained at the French Culinary Institute, suggests that Six Three One will be unlike any other North Fork restaurant. The food, he said, is inspired in part by Native American cuisine. He plans to incorporate corn and other local produce into the extensive menu that is to include a broad selection from sandwiches and seafood to frappes.

“I’m always trying out something different,” he said. “I want to bring Southold something it doesn’t have.”

Six Three One will be open from 6 a.m. to 2 a.m. serving breakfast, lunch and dinner, a rarity on the North Fork. Mr. Dellaportas said he is used to the long hours. His family has been in the restaurant business for more than 40 years and owns the 24-hour Bel-Aire Diner in Astoria, Queens.

The Dellaportas’ love of the North Fork took root three years ago when Ms. Dellaportas purchased the White Swan B&B in East Marion. Traveling to the North Fork from Queens, the family developed a pet name for the area, which is now the restaurant’s namesake.

“When people asked where on Long Island are you going, I said ‘631’,” Mrs. Dellaportas said. “It was easier to text.”

tony's fusion greenport
Photo by Cyndi Murray | Tony’s Asian Fusion will open a new location in Greenport on Thursday August 1.

In Greenport a representative of Tony’s Asian Fusion said the village was an ideal spot for the businesses’s fifth location.

“Tony Chen likes the town,” Joe Sicoraza, who is overseeing construction of the Front Street storefront, said of the owner. “The opportunity came up to get a good place so he said, ‘Let’s go for it.’ ”

The Hamptons-based restaurant features Chinese, Japanese and Thai cuisine and a wide selection of sushi. Mr. Sicoraza said the Front Street restaurant was constructed with environmentally friendly building materials, with walls fashioned from reclaimed barn wood.

“We’ve put a lot of work into this place,” Mr. Sicoraza said. “A lot of thought went into every detail.”

Both Port Six Three One and Tony’s Asian Fusion are scheduled to open Thursday August 1.