A suburb of Columbus, Ohio, hosts the hottest ZIP code in the country, with homes there spending few days on the market and attracting more interest from online shoppers viewing listings during the first half of the year. That's Gahanna, which is home to just one five-digit number, topped the list compiled by Realtor.com for the second year in a row.

Gahanna offers the amenities and lifestyle advantages of a larger town but at a lower price point, said the firm. Homes in his ZIP code were priced 11% below the metro area's average and 19.4% below the national median. Homes in Gahanna spent an average of 11 days on the market in the first half of the year, which is 42 days less than the national average. On the demand side, ZIP 43230 attracted more than four times as many views per listing in January through June compared to the national average, said Realtor.com

All of the hottest five-digit numbers in the country are located in the Midwest and Northeast, according to the 10th annual Realtor.com Hottest ZIP Codes report. In Massachusetts, there were three, two in New Jersey, one in New York and one in Pennsylvania. The Midwest holds three spots on the list.