This number called my cell- its a fake number

Number called today at about 3:30. My husband answered. Man started talking, and it was unintelligible due to really bad static and it kept cutting out, so my husband hung up. He didn't hear much of what he had to say, but did hear something about "firefighter" and "police." So this number MAY be a non-profit of some sort.

Number called today around 8pm. Phone call had some major static at the beginning, but waited it out. It was a man who said some information about a fire safety thing and helping burn victims and families. I couldn't understand all of it. He referred to some type of packets going around and asked if, when they came, I could be counted on to make a donation to which I said no. He asked "What if I told the minimum donation was only $10? Could you be counted on for that at least?" to which I replied that I was an 18-year-old with no steady income, so no. He hung up. Possibly a nonprofit, but I couldn't hear the name well enough to search it so I can't be sure if it's legit. Sites like this are the only thing that come up when I search the number though.

Call Received, call Blocked.

Phone rang for 1 sec, I didn't even have time to answer. Then right away, same thing. 3rd time it rang and I answered but heard no one. Strange.