Area codes quiz
U.S. Area Codes Quiz
Free U.S. area codes quiz. Match NANPA area codes (212, 310, 305…) to the places they cover — interactive telephone geography practice on US5 Games.
Score 0/0
Which area code covers this area?
Indiana
How to play
Match NANPA area codes to the places they commonly identify. Area codes overlay the map differently from ZIP or county lines — a third coordinate system Americans use every day on phone numbers.
Area codes as regional shorthand
212 still signals historic Manhattan prestige in culture; 310 and 818 split Los Angeles basins; 305 points to Miami. Overlays and splits change over time, so treat quiz pairs as educational snapshots.
US5 also maintains `/area-codes` reference pages when you want the directory view instead of a scored round.
The 1947 North American Numbering Plan rotary logic
When AT&T and the Bell System established the North American Numbering Plan (NANP) in October 1947, area codes were distributed based on rotary telephone dial pulse efficiency. Populous cities received codes requiring the fewest rotary clicks: New York was assigned 212 (2+1+2 = 5 pulses), Chicago received 312 (6 pulses), and Los Angeles received 213 (6 pulses).
Conversely, rural states with a single statewide code received numbers with higher pulse counts, such as North Carolina (704) or South Dakota (605). This historical mechanical constraint created the iconic area codes that still define American civic culture.
Geographic splits vs modern overlay codes
Until the 1990s, when an area code exhausted its 7.9 million telephone numbers, regional telecom authorities implemented a geographic split — dividing the physical territory so one half kept the old code while the other adopted a new one.
With the explosion of cell phones, pagers, and internet modems, geographic splits became disruptive to local businesses. Modern telecom authorities now almost exclusively deploy overlays: assigning a new code across the exact same geographic boundary, which mandates 10-digit dialing for all local calls.
Explore on US5
Games teach recognition. These Places and reference pages add cost, salary, and map context.
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