If a girl gives you a number and it's a landline number, does that mean it's a bad number or just a home number?

She's 18. Kind of weird that her number is a landline number... should I call it?
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+1 y
"The number you entered is not valid. Please enter a mailbox number." Some mymail voice message after a few calls?
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+1 y
I did use *67, so not sure if that makes any difference... kind of weird and sucky. Rings then wants some mailbox number? What mailbox number?
If a girl gives you a number and it's a landline number, does that mean it's a bad number or just a home number?
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