Surprised no one has posted yet. Anyway, this is a bogus prefix. They don't start with a 1, it's 2. The area code looks spoofed too, as why would Guam call me.
Lately I get these calls on my cell phone, with a partial recording on my voicemail saying, "To be placed on the Do Not Call list press 2 now."
This was on my landline so I saw the number. It was probably the same number that called my cell recently, but it's not smart so unless the phone is on, I don't know what number it came from.