Question: In what North Carolina county is the community that is on U.S. Route 23 and has a zip code of 28715?

Context paragraphs:
Line Lexington, Pennsylvania: Line Lexington is an unincorporated community located in the Delaware Valley on Route 309 in Bucks and Montgomery Counties in Pennsylvania.  It is split between the Bucks townships of Hilltown and New Britain and the Montgomery township of Hatfield.  The whole village is in the North Penn School District and is part of the North Penn Valley region that is centered on the borough of Lansdale.  While it has its own post office with the ZIP code of 18932, portions use the Colmar zip code of 18915, the Chalfont zip code of 18914 or the Hatfield zip code of 19440.  It is served by SEPTA bus route 132 and the nearest regional rail stations are nearby in Colmar and Chalfont.  The Line Lexington telephone exchange uses area code 215.

England Hill, Kentucky: England Hill is an unincorporated community located on the west shore of the Big Sandy River and along Paddle Creek in Boyd County, Kentucky, adjacent to the southern city limits of Catlettsburg on U.S. Route 23 and historic Mayo Trail.  Mayo Trail was previously U.S. 23 until the current alignment which bypasses the community was completed in 1963.  England Hill is closely associated with the city of Catlettsburg and has fought annexation by Catlettsburg numerous times over the years.  The area known as England Hill is served by the England Hill Volunteer Fire Department, founded in 1977, and the Catlettsburg, Kentucky zip code.  The subdivision known as Hyland Heights was developed on a portion of the former Hyland Dairy Farm, after the business was sold to Johnson Dairy Co. in the 1960s.  The lands of the former dairy farm was subdivided and sold in lots during the 1960s and 1970s.  Transplants who moved from Catlettsburg due to the modernization/widening projects that were completed on U.S. Route 23 during that time.  The England Hill School, later renamed Cooper School, served residents in K-8, then K-6 for many years in Hyland Heights.  Cooper School was open for 26 years, from 1962 to 1988 when students were transferred to the nearby Catlettsburg or Durbin Elementary Schools depending on the location of their home address.  England Hill is a suburb of Catlettsburg, and has fought annexation into the city many times, most notably in 1987, when Catlettsburg tried to annex England Hill and all areas north of I-64.

South Mills, North Carolina: South Mills is an unincorporated community and census-designated place (CDP) in Camden County, North Carolina, United States.  Its population was 454 as of the 2010 census.  South Mills has a post office with ZIP code 27976, which opened on March 2, 1840.  The community is located near U.S. Route 17, and U.S. Route 17 Business and North Carolina Highway 343 pass through the community.

Topton, North Carolina: Topton is an unincorporated community in Cherokee County, North Carolina, United States.  Topton is located on U.S. Route 19, U.S. Route 74, and U.S. Route 129, 7.5 mi east-northeast of Andrews.  Topton has a post office with ZIP code 28781.

Burnaugh, Kentucky: Burnaugh, Kentucky is an unincorporated community located in Boyd County, Kentucky along U.S. Route 23.  Being located between two communities, Burgess Station, a former C&O Freight and passenger terminal and Kavanaugh, it takes its name from the combination of the two communities.  It is located on both the former Mayo Trail (Ky.  Rt. 3 prior to 1964) and present-day U.S. Route 23.  Burnaugh is located within the ZIP Code Tabulation Area for zip code 41129, which includes the nearby city of Catlettsburg.

Otto, North Carolina: Otto is an unincorporated community in Macon County, North Carolina, United States.  Otto is located along U.S. Route 23 8.4 mi south of Franklin.  Otto has a post office with ZIP code 28763.  Otto has a community development organization which meets to regularly in the Otto Community Building.  This building is attached to the Otto Fire Station which is run by volunteer firefighters.

Interstate 26: Interstate 26 (I-26) is a nominally east-west (but physically more northwest-southeast diagonal) main route of the Interstate Highway System in the Southeastern United States.  I-26 runs from the junction of U.S. Route 11W and U.S. Route 23 in Kingsport, Tennessee, generally southeastward to U.S. Route 17 in Charleston, South Carolina.  The portion from Mars Hill, North Carolina, east (compass south) to Interstate 240 in Asheville, North Carolina, has signs indicating I-26 because the highway does not yet meet all of the Interstate Highway standards.  A short realignment as an improvement in the freeway was also planned in Asheville, but has been postponed indefinitely due to North Carolina's budget shortfalls.

Candler, North Carolina: Candler is an unincorporated community in Buncombe County, North Carolina, United States.  It lies on North Carolina Highway 151 and U.S. Routes 19, 23, and 74 Business, at an elevation of 2,122.7 feet (647 m).  The ZIP code of Candler is 28715.  The community is part of the Asheville Metropolitan Statistical Area.

U.S. Route 23: U.S. Route 23 (US 23) is a long north–south U.S. Highway between Jacksonville, Florida, and Mackinaw City, Michigan.  It is an original 1926 route which originally reached only as far south as Portsmouth, Ohio, and has since been extended.

New Jersey Route 23: Route 23 is a state highway in the northern part of New Jersey in the United States.  The route runs 52.63 mi from County Route 506 (Bloomfield Avenue) and County Route 577 (Prospect Avenue) in Verona, Essex County northwest to the border with New York at Montague Township in Sussex County, where the road continues to Port Jervis, New York as Orange County Route 15.  Route 23 heads through Essex and Passaic Counties as a suburban arterial varying from two to four lanes and becomes a six-lane freeway north of a complex interchange with U.S. Route 46 and Interstate 80 in Wayne.  The freeway carries Route 23 north to a concurrency with U.S. Route 202.  Past the freeway portion, the route heads northwest along the border of Morris and Passaic Counties as a four- to six-lane divided highway with a wide median at places, winding through mountainous areas and crossing Interstate 287 in Riverdale.  The route continues northwest through Sussex County as a mostly two-lane, undivided road that passes through farmland and woodland as well as the communities of Franklin, Hamburg, and Sussex before reaching the New York border just south of an interchange with Interstate 84 near High Point State Park.

Supporting paragraphs: Candler, North Carolina U.S. Route 23
Answer: Buncombe County