Same issues here, same ISP and same state.

In another thread, another user narrowed it down to an issue with some nodes through Los Angeles, where Cox hands the data off to NTT:
ae-7.a00.lsanca20.us.bb.gin.ntt.net [129.250.194.165]
ae-3.r01.lsanca20.us.bb.gin.ntt.net [129.250.2.233]
ae-8.r23.lsanca07.us.bb.gin.ntt.net [129.250.6.48]

It's very annoying. I don't think it's anything SE can handle, as it is an issue with the route Cox takes to the datacenter though, sadly. I hope something is done soon though...the thought of having to get a VPN for this makes me sad.