Brand at trust signals
CENTURY 21 is a well-known name in real estate, especially in residential property and franchise brokerage. Technically, century21.com has strong credibility markers: a very old domain registration, active SSL, and hosting tied to the United States. Those are the kinds of signals you usually expect from a maintained corporate website with long-term operations, not from a disposable or suspicious domain.
Reputation and verdict
In the market, CENTURY 21 has broad brand recognition and a network model built around local offices and agents. That gives the domain a solid trust profile, even if the end-user experience can still vary by branch. Overall, century21.com looks legitimate, established, and consistent with a major real estate franchise brand.