I just got a call from this number to my cell phone.

The number keeps calling but I haven't  answered. Wierd

They seemed to be calling about a domain name but I couldn't understand them so I hung up.

I answered when they called me. It was what sounded like a telemarketer with a very strong accent. It was hard to hear what she was saying, but I made out the word "owner" in what sounded like to be a question. I assumed she was asking if she was speaking to the owner of my house, so I told her it was a business phone and could not receive sales calls. She quickly said "bye" and hung up. I called back recently, but it says "call cannot be completed as dialed". I am guessing they are trying to sell things to homeowners.

I am a programmer maybe its a recruiter?

same as listed above, cannot dial the number back, highly suspicious.

Answering with "hello" was replied with an automated "goodbye" and then hangup. Same call from different number (602-197-2928) yesterday.

Called. Recording said, "Goodbye" and the call disconnected.

Said hello, heard click then background noise, so I hung up. Sounded like a telemarketing call where they wait for an answer before patching thru to a sales person. They didn't call back.

This was a hang-up call. I heard back-ground noise, said hello about four times before they hung up on me. Reverse-phone look-up does not provide any information on them. Calling the number back resulted in a recording telling me that the phone number was not a working number