In the alphabetical assignment of districts, N10 corresponded to Muswell Hill. At the time this was a (not very well defined) part of the borough of Hornsey, so it is now part of the London Borough of Haringey. However, because the postal district boundary lay along the North Circular Road, N10 also included parts of the then Friern Barnet Urban District Council area, which became part of the London Borough of Barnet. Conversely, there are parts of N8 (Hornsey) that would probably see themselves as belonging to Muswell Hill.
In the property market, N10 is one of the more desirable postal districts.