When I first got sober, my first time around, I had numbers but didn't call people, even to just say "hello". I felt like I was bugging them. I relapsed because I didn't then feel connected or supported. That was my own, and in retrospect, poor choice. When I got sober again, I started reaching out. Now I keep in regular contact with a few people and I don't feel alone. You aren't bugging people when they give you their numbers. They need contact with other alcoholics as much as you need them. You get what you give. If they didn't want you to call, they wouldn't give you the number.