My 9 year old daughter's T-Mobile phone (574 area code) keeps getting calls from the Fort Wayne area, with suspiciously similar numbers.  At the cost of $2 a day when used, we don't answer unknown callers.  They leave minute long voicemails that are completely silent.  I assume it's a debt collector as in the past we've had many debt collectors calling for the last person who owned this number (who according to K-Mart layaway is still giving our number out 6 months after it became ours).

One of the Fort Wayne numbers left an automated message on voicemail asking for a Juan Sanchez (on a different number similar to this number that keeps calling my daughter's cellphone).

Possibly Associated with:
260-440-3516 <- Left automated message on voicemail
260-440-3499 <- Left silent voicemail
260-494-1589 <- Left silent voicemail
260-494-1416 <- Left silent voicemail