Username

A username allows a user to login to Roblox. It is also used to identify other users. Players can choose their username when creating an account, but it costs 1000 Robux to change it later on.

During the early stages of Roblox, usernames could have spaces in them, such as John Doe and Jane Doe, though this feature was later removed during 2006 due to the fact that people could impersonate other users by putting a space before the username. Currently Roblox usernames can only consist of 3-20 characters using letters, numbers and a single underscore only. In 2018 users were prevented from having usernames made up of only numbers, this was to prevent users creating usernames of phone numbers and because Roblox were adding a login by phone number feature.

Changing Usernames
Originally, users were only allowed to change their names due to either privacy concerns (such as the username being a player's full name) or per request by the moderation team due to the name violating the ROBLOX Terms of Service. If a user did not provide an alternate name, the username would then be changed to [ Content Deleted (NUMBER) ] for usernames changed prior to 2014 or ResetUserID for names changed after 2014.

A feature released on October 22, 2013, allowed users to voluntarily change their usernames for a 1000 Robux fee. All usernames that are changed must satisfy all username requirements and policies.

Namesniping
Namesniping is an activity people do to find rare or lucky names only earlier people could get. For example, "Player" is an example of namesnipes. Most accounts are made for the purpose of taking the name before somebody else can; these accounts are often left inactive or rarely used. However, some people, like 1337, trucks, Bob, Ded, pill, Troller, ton, blazee, binary, exe are/were active within the Roblox community.

[ Content Deleted ] Usernames
As of now, there are only 4 non-terminated users with Content Deleted usernames.
 * Caxxt previous username was [ Content Deleted ]
 * [ Content Deleted 19054417 ]
 * [ Content Deleted 13895038 ]
 * [ Content Deleted 10207883 ]

Period Usernames
There are currently only 6 known users who have periods in their usernames.
 * david.baszucki
 * erik.cassel
 * YUKI.N
 * Predator.John123
 * foot.longer
 * mimi._.2121

Username trends
Aside from namesniping, people often use username trends to make a unique name for themselves and still take the idea of namesniping or adding initials before a name. Some username trends go to the idea of online dating.

A list of popular name trends:
 * (Name)Wyd
 * Xx(Name)xX
 * xomq(name)
 * (name)Daily
 * (name)YT
 * (name)Aourh
 * ii(Name)
 * mlg(name)
 * dantdm(name)
 * dan(name)
 * denisdaily(name)
 * denis(name)
 * roblox(name)
 * (name)123
 * (name)123456789
 * (name)1234567890
 * (name)slayer
 * (name)(number)
 * pro(name)
 * mr(name)
 * i(name)
 * savage(name)
 * (name)savage
 * Itz(name)
 * x(name)
 * miss(name)
 * xx(name)

Username Restrictions
Usernames cannot:
 * have inappropriate phrases in them
 * have spaces
 * have 2 or more underscores
 * have more than 21 characters (only achievable via Xbox/iOS related glitches)
 * have less than 3 characters (only achievable via roblox admin panel)
 * be the same as someone else’s username
 * have any special characters in them
 * be a banned user's username
 * contain underscores as the first or last character of the username

Common Topics in Usernames

 * Movie Characters
 * Game Characters
 * Certain YouTubers
 * Pets
 * Family
 * Youtube Channels

December 2016 exploit


On December of 2016, there was an exploit where people could make a new account that was the same name a different user, "David " and "David" for example. and people also used this to make 2 letter accounts, such as "pi " and "hi ". This was patched days after the exploit was discovered and all users that were made with the exploit were deleted. At the same time, users were also able to create users with a dash in their name, e.g. Builder-Guy. All users with dashes in their name got reset.

Usernames with 21+ characters.
In Roblox, it is possible to have usernames with 21 or more letters using glitches. These usernames are mostly occurring in Xbox related profiles.

In 2011, an iOS glitch allowed people to to create accounts with a username consisting up to 50 characters. Many accounts with extremely long names have been created during that time, like this one.

Trivia

 * simcitiweegee is the only known user to have a # in their previous username.
 * Мастер has a username containing Acrylic characters.
 * It was possible to create usernames with 2 or more underscores, for example: codie__78_hockey or Killing_machine_91.
 * JJ has a username that contains only 2 letters, hence the minimum amount of characters you can have in a username is 3. Another user named qa has only 2 letters in their username. (Both accounts are terminated)
 * hi has spaces at the beginning of their username, although it cannot be seen by profile. The username looks as it has 2 characters, although in reality it has 9 characters, with 7 of them being spaces at the beginning.
 * _JP_ and HD_ are the 2 only known users that have an underscore as the first or last character.
 * mimi._.2121 is one of the only users with both periods and an underscore in the middle of their username.