Username Checker

Username rules on every platform

What each platform allows, how often you can change your name, and what happens to an old one, from each platform's own pages. “Not published” means the platform doesn't say.

Platform	Length and characters	Changing it	Old and deleted names
Discord	2–32 characters · a–z 0–9 _ .	Twice a week	A deleted account is gone for good after 15 days
Instagram	Not published	Any time	Free for anyone after the 30-day deletion
TikTok	A–Z 0–9 _ .	Once every 30 days	Locked for a short time; in the US, reclaimable after 180 days without a login
Roblox	3–20 characters · A–Z 0–9 _	Costs Robux each time	Not published
Minecraft	3–16 characters · A–Z 0–9 _	Once every 30 days	No hold period published now
Twitch	4–25 characters	Once every 60 days	After at least 180 days; never for Partners or banned channels
YouTube	3–30 characters · A–Z 0–9 _ - . ·	Twice in 14 days	Held 14 days, then anyone can take it
X (Twitter)	5–15 characters · A–Z 0–9 _	Any time; the old name is free at once	Inactive handles only through X's paid Handle Marketplace
Snapchat	3–15 characters · A–Z 0–9 _ - .	Once a year	Not published
Xbox	Up to 15 characters · A–Z 0–9	First change free, then a fee	A changed gamertag can be taken by someone else
Telegram	5–32 characters · A–Z 0–9 _	Any time	An unused account deletes itself after 18 months by default
GitHub	Up to 39 characters · A–Z 0–9 -	Any time; the old name is free at once	A deleted account's name after 90 days
Kick	Not published	Once every 60 days	Not published
Reddit	3–20 characters · A–Z 0–9 _ -	Never	Never reused
Pinterest	3–30 characters · A–Z 0–9 _	No limit published	A deactivated account keeps its name
Facebook	At least 5 characters · A–Z 0–9 .	No limit published	Pages can lose an unused name
Bluesky	3–18 characters · A–Z 0–9 -	Any time	Your last .bsky.social name stays reserved for you
LinkedIn	3–100 characters · A–Z 0–9	5 times in 6 months	180 days after the account closes
Chess.com	3–25 characters · A–Z 0–9 _ -	Once every 90 days	Release of inactive names is paused
Lichess	2–20 characters · A–Z 0–9 _ -	Never (capitalisation once)	Never available again

Is this username taken? What each answer means

Each platform's row answers it with one of five words, and each one is what the platform told us, not what we guessed.

Free

The platform says no account holds the name: its sign-up check accepts it, or the profile address answers “not found”.

Taken

An account holds the name. A closed or suspended account can still hold it, and the row says so when the platform tells us.

Not allowed

The name breaks the platform's own rules: too short, too long, a character it refuses, or a word it reserves. The row names the rule.

Can't confirm

The platform gave no clear answer this time: it asked us to slow down, didn't answer in time, or turned the check away. Retry, or open the platform.

Check yourself

The platform shows profiles only after a login or blocks automated checks from everywhere, so no website can check it for you. The row says what you'll see when you open it.

Held or reserved

Some names are taken with no profile to see: a closed or suspended account, an organization, or a word the platform keeps for itself. Others are held for a while after their owner gives them up (14 days on YouTube, 90 on GitHub, at least 180 on Twitch). The row adds a note whenever the platform tells us or documents the hold.

Username lookup API

The same checks as a stream of JSON lines, free: one line per platform as it answers. It covers every platform our server can ask; Discord and Lichess answer browsers only.

$ curl -N https://dnsrobot.net/api/social-username \
    -H "Content-Type: application/json" \
    -d '{"username":"dnsrobot","only":["tiktok","roblox"]}'

{"type":"start","username":"dnsrobot"}
{"type":"result","platform":"Roblox","id":"roblox","url":"https://www.roblox.com/search/users?keyword=dnsrobot","responseTime":212,"available":true}
{"type":"result","platform":"TikTok","id":"tiktok","url":"https://www.tiktok.com/@dnsrobot","responseTime":388,"available":true}
{"type":"complete","checkedAt":"2026-10-19T18:00:00.000Z"}