Found 2 mln. answers for '676'.
https://en.wikipedia.org/wiki/Telephone_numbers_in_Tonga
https://countrycode.org/tonga
https://www.omnihotels.com/hotels/chicago/dining/676-restaurant-and-bar
https://www.mathway.com/popular-problems/Algebra/215690
https://www.flightradar24.com/data/flights/ba676
https://www.flightradar24.com/data/flights/cx676
https://www.flightradar24.com/data/flights/az676
https://www.pantone.com/color-finder/676-CP