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ZIP code: 21209. Area code: 410, 443, and 667: Coldspring, also known as Cold Spring, is a neighborhood in the North District of Baltimore, located between Cylburn ...
ZCTAs or ZIP Code Tabulation Areas are the census equivalent of ZIP codes used for statistical purposes. The reason why regular ZIP codes are not used is because they are defined by routes rather than geographic boundaries. Thus, they have the tendency to overlap and otherwise create difficulties.
A ZIP Code (an acronym for Zone Improvement Plan [1]) is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly [2] (zipping along) when senders use the code in the postal address.
ZIP Code Tabulation Areas (ZCTAs) are statistical entities developed by the United States Census Bureau for tabulating summary statistics. These were introduced with the Census 2000 and continued with the 2010 Census and 5 year American Community Survey [ 1 ] datasets.
Post office sign in Farrer, Australian Capital Territory, showing postcode 2607. A postal code (also known locally in various English-speaking countries throughout the world as a postcode, post code, PIN or ZIP Code) is a series of letters or digits or both, sometimes including spaces or punctuation, included in a postal address for the purpose of sorting mail.
Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...
Area codes were assigned based on the volume of traffic and the speed of dialing the code on a rotary electromechanical dial phone, so that the higher the volume of traffic, the less time it took to dial the area code. Area code 212 was the quickest, followed by 213 (Los Angeles) and 312 (Chicago), etc., all the way to 919 (North Carolina).
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... 21251 /21320. Elevation: 373–435 m (1,224–1,427 ft)