It appears as though both block explorers are offline. Both http://clamsight.com/ and http://www.presstab.pw/phpexplorer/CLAM/ are offline right now 9:06 PM UTC Wednesday, October 25, 2017. If CLAM ever want's to be a successful project with more mainstream adoption, I suggest that there be a working block explorer that is running 24/7. Maybe something like https://github.com/iquidus/explorer or https://github.com/bitpay/insight running on AWS? Maybe using advertising to offset hosting costs?

EDIT: I just read the post above mine, please update the main post to include http://khashier.com/