I have been getting calls from this number. How do we block it??

Got 17 calls from this number - called it back and it's the Children's Leukemian Foundation.

As a mother who of a child with leukemia, I was very disgusted to hear that one of my co-workers received a call from this number, and was very rude to her.  He phoned last year, and rudely insisted that perhaps her donation would be enough to find a cure, after she repeatedly told him that she donates to other charities, and is not interested.  He made her feel very guilty for not donating.  Plus, you should NEVER donate over the phone.  He phoned again a few days ago, and again was very rude.  I've been dealing with my daughter's illness for 2 years now, and have never heard of this foundation in Alberta.  I do see that there is a foundation of that sort in Ontario, but I have no idea how legit that is either from the information that I've read on their website.  They don't give you a contact number, only a number to call to donate.  Their donation form only has an address, no phone number.  Whatever you do NO DO DONATE ANYTHING over the phone.

I received a HANG UP call from this number.  That only makes me NOT want to donate to their "charity".  Are they a legitimate charity?  I checked out the web site.  Very little info on the site.  I emailed them and said such calls are a total turn off.  Is it offshore telemarketers who have no manners?  Are they american telemarketers who are just plain rude?  the number on call display means nothing.  I have received other hang up calls and when i call back I get "this number is not in service".  How can that be?  the scammers are obviously smarter with technology than I am.  Or maybe i an just too honest and polite.

I got a call this morning -- once I answered the person said one, unintelligible, word and then hung up.

Got called by this number over 20 times today. ?It's still calling me after 10 minutes!!! Picked up and no answer. no message left. Who is this number????? $@#&!@!