This number is NOT associated with Century Link.  I just called Century Link and they told me they do not make outbound sales calls, only take inbound calls.  Be aware they are not agents of CL

Claims to be with Century Link and in reality they tell you that information to agree to change your rates.  It does change your rates by adding charges to you bill that is not associated with Century Link.  Their voice mail calls them the "CL Sales Team, your authorized Centurylink sales rep.".  If you call Century link from the number on your bill, they will tell you that that company is NOT associated with Century Link and then Century Link can put a block on your phone from allowing outside sources to add to your monthly bill.

I called this number back and the message said the it is a CO Sales Team analyzes with Century Link and if I knew the extension to enter it.

I verified with Century link that this is NOT a Century link number and it is NOT affiliated with Centry Link.

This number is for a Century Link Authorized Sales Agent

When I called the number back the answering machine said it was "QCS" and asked me to leave a message.  The caller ID said Monroe, LA

Claimed to be CenturyLink.  When pressed, hung up.

I suspect it is a slammer.