Can't get to bank website from my ISP

I am attempting to log on to a bank website from my ISP. Website is up and available on other ISP's but when I attempt to sign on or ping from home ISP the site is not available. Tried IE.8, Safari and Google Chrome. Works from my I-Phone Worked until about a week ago. New Router and Modem installed recently, but worked after that. Running Norton 360.

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