The area code for Washington DC is +1 202.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
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There are over 280 zip codes in Washington, D.C.
They are in the range 20001 through 20099 for addressees other than the U.S. Government and 20201 through 20599 for the U.S. Government.
62259
Washington, DC
According to Zip express this zip code is for Suffolk, Virginia.
Northwest Washington DC
Washington, DC
Washington DC has 30 different ZIP codes, starting at 20001 and ending at 20502, at this time. At least a dozen of these ZIP codes are direct descendants of the Zone system used before the 1963 introduction of the ZIP codes. For example a letter sent in 1962 would have been addressed to "Washington DC, 6" in 1964 would have been addressed to "Washington DC, 20006".
202 is the area code for Washington DC.
1600 Pennsylvania Avenue NW, Washington DC 20500
The ZIP code at the White House is 20500.
Washington DC is the capital city of the US, it does not have a capital city.
The zip code for Washington DC is 20500 (The District of Columbia is a densely populated area and has 20-30 different zip codes. 20500 may be one of them. However, I received a personal letter from President Obama last week (Jan. 2016) and the zip on the envelope was 20006.)
Since there are thousands of zip codes for locations in the US, you need to consult a zip code directory for a specific zip code. See the link below for the US Postal Service zip code look up.
The street address of the AAA (Triple-A) office in Washington, DC is located at 1405 Northwest G Street, Washington DC, Zip Code 20004. Phone Number for the Office is 202-481-6811