Cisco Routing

So I have a cisco 2921 router with a 16 CIDR block of IP's from cox. Everything has been fine till last night all my traffic can get out but non of the CIDR IP's are reachable. My cox router has a different address then the CIDR block IPS's. I do have and inbound Access List but again nothing was changed there and it was all working fine till last night. What can I do to trouble shoot? I'm really lost
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Bryant SchaperConnect With a Mentor Commented:
you contact cox, are they just sending your block to your single IP, and maybe they stopped?
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