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There are some parts of the country where locals seem to have their bags packed practically from birth—ready to move at a moment’s notice. And then there are others where they put down deep roots, sometimes forever.

So which markets are seeing the most churn? Contrary to what you might think, it’s not the big melting pots of New York and Los Angeles. Instead, the little-known port city of Wilmington, NC, topped the list in the second quarter of the year, according to a quarterly index created by real estate information firm ATTOM Data Solutions.

The report looked at 131 metropolitan areas with at least 100,000 single-family homes and condos. (Metros are large cities and their surrounding suburbs and towns.) ATTOM created an index from data collected from mortgage applications for residential sales to show the average ratio of homes likely to be sold in a metro.

“This is really a little bit of a heat check on real estate markets where we are expecting to see either strong sales or weak sales,” says Daren Blomquist, a senior vice president at ATTOM. “This [report] points to which markets are going to have strong home sales in the third quarter—and which ones aren’t.”

Wilmington, where the popular ’90s TV series “Dawson’s Creek” was filmed, is known for its beaches and being the home of the University of North Carolina Wilmington. And it’s becoming a go-to spot for seniors who moved from the snowy Northeast…