OpenDNS pioneered consumer DNS filtering and typo correction. 208.67.222.222 and 208.67.220.220 are the standard resolvers; 208.67.222.123 / 208.67.220.123 (FamilyShield) block adult content with no account required.
Seeing 208.67.x.x in a corporate device's DNS settings usually means Cisco Umbrella is enforcing a security policy — this is common on managed laptops.