Good news, it's not you - it's them. Both your router and ISP are fine ....
At least for the moment, their website is down (crashed, DOS, offline or whatever) I had a mobile link to Choicehotels . com and it's not going thru either on my smartphone.
"choicehotels.com is Temporarily Unavailable.
It's not you - it's us! choicehotels.com is temporarily unavailable. Please click here to try again in a few minutes. Thank you, and our apologies for the delay.
For immediate reservations or assistance, a Choice Hotels representative is available now.
1-877-424-6423"
http://www.choicehotels.com/notavail/en/Home.html