Twitter passed a geeky milestone on Sunday night: Its user IDs broke into the 10 figures.
Adrianus Wagemakers, the founder of the Amsterdam-based Twopcharts, which tracks the most influential Twitter users by city, says that there was no account number 1 billion. Instead, Twitter registered account 1000000002, which was quickly suspended.
Twitter assigns a unique user ID to everyone who joins the network. Though you can't see it on your account, you can check yours here. Twitter started with number one and counted sequentially until July, when it surpassed user ID number 500000000. Sometime after that, Wagemakers says, Twitter began giving out three user IDs and then skipping the next three. The company also skipped about 70 million numbers and went straight to 700000000. Yet Twitter's "give three, skip three" system is very consistent, which allows Twopcharts to keep accurate records.
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By the company's estimation, Twitter has about 640 million existing accounts. Some 100 million of them are suspended, however. Wagemakers doesn't know why they're suspended, but it's likely many of them are spam accounts.
Among Wagemakers' other findings:
There are roughly 72 million active Twitter accounts. These accounts average five tweets a day for a total of around 360 tweets a day. That's in line with Twitter's claim earlier this year of 400 million tweets per day.
Twitter had 36 million protected accounts, i.e. accounts whose tweets can only be seen by followers and who can approve or deny follower requests.
357 million accounts have posted at least once.
96 million accounts have tweeted at least once in the last 30 days.