He dumped me and moved on, so why is he calling me restricted?? Ugh!!

Someone please help. My ex dumped me and I moved out at the end of July. Since then I have gotten a restricted calls pretty much weekly. I have never answered, but was pretty sure it was him because I never get restricted calls when we are together. I had been getting texts too, but I blocked them and the calls continued. I got a restricted call last night and answered it. Only to have the person hang up. If it was a telemarketer or bill collector, they wouldn't hang up. If it is him...(I'm 99.9% sure it's him)...why is he calling me and why didn't he say anything when I answered. so tired of the games. He just sent me an email last week saying he doesn't understand why I blocked him and said he wants to know how I'm doing and misses our friendship...nice! He also wished me well and happiness...ugh! So...with that being said, it pretty much sounds like he is over me and happily moved on, which makes me wonder why is he still calling me restricted. Can anyone shed some light on this? Thanks.
He dumped me and moved on, so why is he calling me restricted?? Ugh!!
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