Biggest World Cities within 300 km with letter hints on dots

Name the 616 cities that are more populous than any other within 300 km.

To get started type any number: smaller dots within cities with less than 2.5 M inhabintants will turn green. Moving the mouse over them will show the initial letters of that city. The number of letters (up to 4) shown depends on city size.
Data for 1M cities from, for smaller from
Bigger dots mean bigger population
Blue dots indicate world capitals (dark blue agglomerations containing them), red dots indicate urban agglomerations without a main city, purple dots indicate external capitals
Quiz by scambigol
Last updated: April 17, 2019
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First submittedFebruary 22, 2017
Times taken666
Average score61.1%
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Level 78
Mar 8, 2017
You've outdone yourself here mate!
Level 58
Apr 21, 2019
Fun and challenging quiz.
Level 56
Jun 5, 2020
This is basically CRAZY