I have some domains, and I'd like to Lock them all, to prevent fraud chances. However, the control panel of the domain seller doesn't have this feature.I created a ticket for them, to lock all of the domains, and they announced that they've done it, and all domains are locked now.However, I'd like to see it myself. A friend of mine told me that whois protocol shows the Lock Status, and I checked it out, and saw the Status: Locked for some of my domains. But for other domains there is no clue about locking status at all. The data is retrieved from OnlineNic's Whois database. What should I do? 
How to understand if a domain is locked or not?
domains
Go to www.iptools.com and lookup your domain in the domain info box. On the results page swtich to the registration tab and you should see something like:-clientDeleteProhibited clientRenewProhibited clientTransferProhibited clientUpdateProhibitedWhich indicates the locking status. more info on this from icann