List of cities from DISTRICT OF COLUMBIA's county

ACTION	ADM OFFICE US COURT
ADV COMM INTER GOVT RELATION	AMER ASSC RETIRED PERSONS
ANACOSTIA	ANACOSTIA ANX
ARMED FORCES INAUGURAL COM	ARMED FORCES INST PATHOLOGY
ARMS CONTROL AND DISARM AGY	ARMY CRIMINAL INVEST
BANK OF AMERICA	BLUE CROSS GROUP HOSP
BOLLING AFB	BOLLING AIR FORCE BAS
BRM	BROADCASTING BD OF GOVERNORS
BUR MEDICINE SURGERY	BUREAU ENGAV AND PRINTING
BUREAU HEARING AND APPEALS	BUREAU LABOR STATISTICS
BUREAU NARC AND DNGR DRUGS	BUREAU NARC DNGR DRUGS LAB
BUREAU OF CENSUS	BUREAU OF INDIAN AFFAIRS
BUREAU OF MINES	BUREAU OF PRISONS
BUREAU OF PUBLIC DEBT	BUSINESS REPLY
C AND P TELEPHONE	CATHOLIC UNIV
CENTRAL INTELLIGENCE AGENCY	CHIEF NAVAL OPERATION
CIVIL AERONAUTICS BOARD	COMM EQUAL OPPOR ARMED FORC
COMM ON CIVIL RIGHTS	COMM TECH USES COPYRIGHTS
COMMODITY FUTURES TRADE	COMPTROLLER OF CURRENCY
CONSUMER PRODUCT SAFETY COMM	COURT OF MILITARY APPEALS
CRITERION INS CO	DEFENSE INTELLIGENCE
DEPT AGRIC OFF OUTSIDE HQ	DEPT AIR FORCE PENTAGON
DEPT HEW OFFS AT HQ	DEPT LABOR OTHER OFFICES
DEPT LABOR PAYROLL AUDIT DIV	DEPT NAVY FED CREDIT UNION
DEPT NAVY HQ MARINES ARL	DEPT NAVY OTHER OFFICES
DEPT OF AGRICULTURE	DEPT OF ARMY PENTAGON
DEPT OF COMMERCE	DEPT OF COMMERCE OUTSIDE HQ
DEPT OF ENERGY	DEPT OF HOMELAND SECURITY
DEPT OF INTERIOR	DEPT OF JUSTICE
DEPT OF LABOR	DEPT OF LABOR MANPOWER ADMN
DEPT OF STATE	DEPT OF TRANSPORTATION
DEPT STATE INTERNATL DIV	DEPT TREAS CHECK CLAIMS DIV
DEPT TREAS INTERN REV MAIN	DEPT TREAS OTHER OFFICES
DEPT TREAS SECRET SERV HQT	DIR NATIONAL INTELLIGENCE
DISTRICT DIRECTOR IRS	DULLES INTERNATIONAL AIRP
ENVIR PROTECT AGENCY	EQUAL EMP OPPORTUNITY COMM
EXEC OFFICE OTHER ORGAN	EXECUTIVE OFF OF THE PRES
EXPORT IMPORT BANK	FAMILY SUPPORT ADMINISTRATIO
FARM CREDIT ADMIN	FBI
FBI IDENTIFICATION UNIT	FED COMMUNICATIONS COMM
FED EMER MNGT AGENCY	FED LABOR RELATIONS AUTH
FED MEDIATION AND CONCIL SER	FED RECORDS CENTER
FEDERAL AVIATION AGENCY	FEDERAL DEPOSIT INS CORP
FEDERAL ELECTION COMM	FEDERAL ENERGY REG COMM
FEDERAL MARITIME COMMISSION	FEDERAL RESERVE BOARD
FEDERAL TRADE COMM	FHA COMPTROLLER
FIRST AMERICAN BANK	FOOD & AGRICULTURE ORGAN OF
FOREIGN CLAIMS SETTLEMENT	FORT LESLEY J MCNAIR
FORT MCNAIR	FRIENDSHIP HEIGHTS
FT L J MCNAIR	G E I C O

What is ZIP Code?

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan,[1] is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired