Simple... don't recognize the number, don't answer the phone.  Let it go to voice mail then search the number here and most often you'll find you're not the only one getting these calls.  If the don't leave a message, then how important could it be?

Froud.

This guys just doing froud. Be VERY careful. Don't give them ANY info.

I have been receiving calls from this number and they are stating they want to give me grant money and want a lot of personal information.  I hung up on them and would not give it to them.

This is a scam, I told the lady to send me all information via mail and she hung up on me.

they told me i was selected for a $7000 grant as well,   they told me to get a paper reload it card with $200,  for a deposit,  I know those cards are only used for prepaid credit cards,  they said they would direct deposit the money to my account,   I told them I was the FBI , you can't con me,  stop f****ng calling me!!!

Made obscene call to my 82 year old mom.

It is a scam.
The government does not offer grants to individuals for personal use.
It is a scam ran by off shore con artists to trick you into sending unrecoverable money to them, you get nothing in return.

The only legitimate avenue for government grants is through www.grants.gov which is the official US government webs site for grants.
From their FAQ concerning fraud:
http://www.grants.gov/web/grants/support/general-support/grant-fraud.html

Please note the following:

No government grant-making agency will make phone calls; send email or letters to solicit money or personal banking information from a potential grant recipient.  
There are no processing fees for federal grants.
Federal grants are not issued for personal use, but are intended for institutions and non-profits to carry out projects with a public purpose.
Know who you're dealing with on the web.  Scam artists will often post a website with a name similar to a legitimate site.
If you have provided personal banking information to anyone claiming to be associated with a Federal grant agency, call your bank immediately to prevent unauthorized access to your account.

If you receive a call, mail, email, FAX, or any other form of communication soliciting you for a grant, STOP.
It is a scam.
Report it to the FTC:
http://www.consumer.ftc.gov/articles/0113-government-grant-scams

File a complaint with the FTC. If you think you may have been a victim of a government grant scam, file a complaint with the FTC online https://ftccomplaintassistant.gov/ , or call toll-free, 1-877-FTC-HELP (1-877-382-4357); TTY: 1-866-653-4261. The FTC enters Internet, telemarketing, identity theft, and other fraud-related complaints into Consumer Sentinel, a secure online database available to hundreds of civil and criminal law enforcement agencies in the U.S. and abroad.

I got.a call.from this number.. I answered and I was told.I was selected.for.a $7000 grant.. they gave me a confirmation number as well as another number to call and confirm myself.so the money could.be western unioned.. I havent done that as I dont know if.it can be trusted

Caller ID says DC, USA they never leave a message. this number has called me 4 time in the last 30 days.