Who texted me from 333?
333 is a UK SMS short code used by Three (customer services) — three customer service texts. Short codes are 3–8 digit numbers that deliver service messages to UK mobiles; they can't be dialled back like an ordinary phone number.
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Quick facts
Short code
333
Used by
Three (customer services)
Category
Network service
Can you reply?
Yes
Status
Documented service
About short code 333
Three uses 333 as its self-care number; genuine account texts can arrive from it.
How it's used: Call or text 333 from your Three handset.
Is a text from 333 safe?
Whoever the sender, judge a text by what it asks, not the number it shows. Genuine organisations never ask you to share passwords, PINs or one-time codes, "verify" card details through a text link, or move money to a "safe account". An unexpected text doing any of those is a scam regardless of the code it came from — sender IDs can be spoofed.
- Don't tap links in unexpected texts — go to the organisation's website or app directly.
- Don't reply to suspicious messages — even "STOP" confirms your number is live to a scammer.
- Forward scam texts to 7726 (free, all UK networks) so your network can act on the sender.
Full guide: how to spot, check and report scam texts in the UK.
Got a text from a full-length number instead?
If the text came from a normal 11-digit UK number rather than a short code, look it up on our free UK Phone Number Checker — you'll see the number type, the Ofcom range holder, a risk level, and any community reports of scam texts or calls from it.
Frequently asked questions about 333
Who texted me from 333?
333 is a UK SMS short code used by Three (customer services) for: Three customer service texts. Short codes can't be called back like normal numbers — they deliver service messages to UK mobiles.
Is a text from 333 genuine?
Texts genuinely sent via 333 relate to: Three customer service texts. But sender IDs can be spoofed, so judge the content: genuine senders never ask for passwords, PINs or payment via text links.
Does it cost money to text 333?
Usage: Call or text 333 from your Three handset. Charity donation codes charge the donation amount; Ofcom service codes (65075, 75075, 85075) and 7726 are free. If in doubt, check with your network before replying.
How do I stop or report texts from 333?
For unwanted marketing, reply STOP only if you trust the sender is legitimate. For suspicious or scam texts, don't reply — forward the message to 7726 (free on all UK networks) to report it, then delete it. You can also report scam texts to Action Fraud.
Other UK SMS short codes
Common UK short codes people look up after receiving an unexpected text.
See the full UK SMS short-code directory.