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Area Code 410 is in Maryland and covers 5760.62 square miles. Area Code 410 contains 321 non-unique postal area zip codes.When did the area code 410 go into effect?
Area code 410 officially entered service on October 6, 1991; it was initially implemented in permissive-dialing mode, not as a flash-cut, with the 10-digit dialing scheme coming in for local calls across the new 301/410 boundary. The split largely followed metro lines.What's the difference between 410 and 443 area codes?
The 410 area code is the original area code, while the 443 and 667 codes are overlay codes. 443 and 667 were primarily used with cellular phones and competitive local exchange carriers such as Comcast or Cavalier Telephone when introduced but have since become universal in their carrier availability.When did Orlando get the area code 407?
In 1988, area code 407 was introduced for the Orlando area. Many of these new area codes have been introduced in the last two decades, as a result of city expansion throughout Florida.