Is my ISP the culprit here?

Living in the Pacific Northwest.
Sometimes when I play everything is fine, average of around 30-50ms. I'll be able to play for hours with no issue.

Other times I'll get a ~200ms ping spike, reliably, every 2-3 seconds. Absolutely jarring - cannot play like that.

After having success playing yesterday, I was interested in playing again this morning, and it was discouragingly back. I remembered your GGG latency post so I thought I'd finally try it. I welcome any advice to understanding and fixing my problem.

This is what I got:
http://pastebin.com/MhmHkxMz

|------------------------------------------------------------------------------------------|
| WinMTR statistics |
| Host - % | Sent | Recv | Best | Avrg | Wrst | Last |
|------------------------------------------------|------|------|------|------|------|------|
| Wireless_Broadband_Router.home - 0 | 200 | 200 | 1 | 3 | 37 | 16 |
| 50-46-128-1.evrt.wa.frontiernet.net - 1 | 196 | 195 | 5 | 22 | 277 | 32 |
| 172.76.21.213 - 0 | 200 | 200 | 5 | 15 | 160 | 35 |
| ae3---0.cor02.sttl.wa.frontiernet.net - 0 | 200 | 200 | 23 | 34 | 234 | 50 |
| ae0---0.cor01.sttl.wa.frontiernet.net - 0 | 200 | 200 | 24 | 34 | 237 | 54 |
| ae1---0.cor02.bvtn.or.frontiernet.net - 0 | 200 | 200 | 24 | 35 | 251 | 31 |
| ae0---0.cor02.bvtn.or.frontiernet.net - 0 | 200 | 200 | 24 | 34 | 197 | 53 |
| ae3---0.cor01.plal.ca.frontiernet.net - 0 | 200 | 200 | 24 | 34 | 241 | 58 |
| ae0---0.cbr01.plal.ca.frontiernet.net - 0 | 200 | 200 | 24 | 33 | 173 | 52 |
| xe-0.paix.plalca01.us.bb.gin.ntt.net - 0 | 200 | 200 | 23 | 34 | 236 | 51 |
| ae-15.r01.snjsca04.us.bb.gin.ntt.net - 0 | 200 | 200 | 25 | 36 | 242 | 53 |
|ae-0.internap.snjsca04.us.bb.gin.ntt.net - 0 | 200 | 200 | 25 | 36 | 243 | 52 |
| border5.pc2.bbnet2.sje011.pnap.net - 0 | 200 | 200 | 25 | 39 | 300 | 50 |
| inapvoxcust-3.border3.sje011.pnap.net - 0 | 200 | 200 | 25 | 38 | 185 | 65 |
| 216.52.30.71 - 0 | 200 | 200 | 25 | 36 | 244 | 52 |
|________________________________________________|______|______|______|______|______|______|
WinMTR v0.92 GPL V2 by Appnor MSP - Fully Managed Hosting & Cloud Provider

i wouldn't say it was your ISP, it looks like the problem occurs between you router and the next hop.

If turning off the router for a few minutes dose not fix it then you need to contact your ISP and hope their front line staff don't bullshit you.