Domain name registrars are accredited organizations that sell domain names to the public. The best example is GoDaddy. They have the right to issue domain licenses to the registrants. And on the other side, resellers sell domains directly to the registrants. They aim on providing an excellent experience to businesses to buy and run domains.

You cannot register for an expired domain name as soon as it expires. There is a grace period to renew the expired domain names and this period can vary from one registrar to another. After that, the domain name has a redemption period which allows the current registrant to renew the domain name by paying the redemption as well as renewal fee. If the existing registrant does not restore or cash in the domain name, it is placed for sale. You can possibly get the domain name by placing a bid for it.

When it comes to domain names, they are not case responsive. You can use your web name in the way you like. You can use it in upper or lower case or a combination of both. You can use letters of the alphabets, any numbers, or a combination of these. Make sure you use in between 3 to 63 characters as this is the limit.

If the domain name you want is unavailable, you can make some slight changes. This will end up in a name that is available. Also, using a different domain extension will help. But make sure you make it simple so that it is not difficult to understand. You can also check whether the domain name is for sale or not. You can find the contact details of the owner and get in touch with the owner to see if the domain name is for sale or not.