KCC.

KCC-Kentucky Consular Center conducts the diversity immigrant visa program.
Green card lottery program and diversity visa lottery program refer to the same U.S. Government visa lottery program.

The popular name Green card lottery doesn't give the winner a green card right away. The winners who were selected as winners in the diversity visa program didn't win a green card but they were given a chance to apply for an immigrant visa.

Successful applicants who pass the visa interview will be issued with an immigrant visa and immigrant visa holders will attain legal permanent residence or green card status upon admission to the United States. There they must do their paper works with the official to get it.

Many people do not qualify for employment based or family based immigration to live in the USA, the most common way to enter the USA and to obtain a green card is via the Green card lottery program.
To take part in the green card lottery you must send your application electronically to the Kentucky Consular Center through the E-DV entry during the green card lottery application accepting period.

Here is the announcement from the DOS regarding KCC.
"The Department of State has only one Kentucky Consular Center. Other organizations using similar names have no connection to the Department of State or KCC. There is no fee charged by the Department or KCC for sending an entry to the lottery program. Applicants selected in the Diversity Visa random drawing will not be sent with the postal letter, NOT e-mail. The results will be available only in the internet and are provided instructions on how to proceed to the next step in the process, if you are selected as a winner for the green card lottery program.

No other organization or company is authorized by the Department of State to notify Diversity Visa lottery applicants of their winning entry. See our Fraud Warning. A Diversity processing fee is only charged when a winning lottery entrant applies for the Diversity visa. At the time of the visa application at a U.S. consular office, each applicant (the DV entrant and any accompanying family members) will be charged a DV processing fee and immigrant visa fee. Both of these fees are non-refundable if the visa is refused. If the visa is issued, a separate visa issuance fee is then charged for each visa.

The application period for the Diversity Immigrant Visa Program (Visa Lottery) usually takes place between October and December each year. Information on the lottery usually is released early September. When information is available on the Department of State website, you can access it by clicking on the link."

KCC contact details for Green Card Lottery. Here.