I called the number back after they've called me daily for at least two weeks. It's the main line for a research company called Strategic Communications that does surveys and fundraising.

They have called me the past few days now. I answer and they hang up once I say hello. Very strange. If its someone looking for donations thats a weird way to let someone know.

Don't know who they are, but the caller left about 15 seconds of humming, then sighed like she was bored with her job and hung up with saying anything.  Had a nice humming voice though.  Hopes she's as bored with her job as I am having to track down unidentified callers.

I received a call from this number and I did not answer it. They did not leave a message.

On Calller ID it says that it is from the US??????!!!!!

The phone number 888-898-4432 is for the Alzheimer's Association asking for donations.  We have been donators in the past and they have recently been calling.  As they are a charitable organization they are exempt from the do not call lists, since they are not a telemarketing organization.  Hope this helps for those who are wondering.

It's the Canadian Alzheimer's Society looking for donations.

I too have had calls from this number at various times but I have not answered and no message has been left.

3 calls from this number today! What a pain! On the do not call list as well.

This number phones us frequently and our ID shows unknown caller.Anyone know who this is? We are listed on the do not call list but we continue to receive a number of calls daily. Frustrating.