My message from this number had to to with an Active Advantage membership through Active.com. Through the Active Advantage program ($60 annual), you are also entitled to discounts at recreational camping sites, in addition to discounts at endurance events (running, biking, etc). I believe this is a legit number because they were returning my call about a question I had. It may be that those park reservations have to go through Active.com to get the discounts?  Anyway, this is a legit number, which in my case, was from Active.com. Interesting how this number is used by so many different services.