This tool called "Find Twitter ID" provides an easy way for you to get a Twitter profile's numeric ID. You can also learn twitter profile color combinations here.
This tool accepts a Twitter username, for example:
1. Find Twitter ID provides an easy way for developers and designers to get a Twitter profile's numeric ID.
2. You will kinda know your place in Twitter history. For example, put the username "jack" in the text box, the numeric ID will show "12", it means he is one of the earliest users Twitter's database.
3. You will know exactly when the account was created.