07521 235415 Negative Who called me from this phone number?

Mobile • Range allocated to Telefonica UK Limited
This number is classified as Mobile. The number is from a range allocated to Telefonica UK Limited. The current community rating is Negative. There are 13 user reports available for this number.
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At a glance

Community signals

  • Community rating: Negative
  • User reports: 13 user reports
  • Last reported: about 1 year ago
  • First reported: about 1 year ago

Number profile

  • UK format: 07521 235415
  • International: +44 7521 235415
  • Number type: Mobile
  • Number range allocated to: Telefonica UK Limited

User Reports (13)

Your reports help others decide whether to answer calls from this number. Share your experience to help the community!

Scam/Fraud
22 May 2025

Claimed to be o2 told them to f off and to remove me from there call list as swearing auto makes normal cold callers to remove your number they said no I'm going to keep calling you. Scammers are spoffing normal people's mobile phone numbers as well this has already happened to me and my husband so be careful calling any mobile number back you don't know :/ if it's important they will leave a voice message

Unknown Caller
22 May 2025

Scam be aware

Spam
22 May 2025

claimed to be hmrc threatening legal action

Unknown Caller
22 May 2025

Missed the call phoned back and got O2 message service

Scam/Fraud
22 May 2025

Robot voice claiming to be HMRC and threating legal action

Scam/Fraud
22 May 2025

Called me and pretended to be from three

Unknown Caller
22 May 2025

Called claiming to be from Vodafone then put phone down

Unknown Caller
22 May 2025

Called with an automated voice claiming to be HMRC, threatened me with court and told me to press ‘1’ to speak to an officer. Thought it was weird as wouldn’t expect HMRC to call on a mobile number.

Spam
22 May 2025

Just silent

Unknown Caller
22 May 2025

weird, just silence then a goodbye

Scam/Fraud
22 May 2025

Automated call claiming to be from HMRC threatening me with court action and telling me to press '1'

Robocall
22 May 2025

Picked up, got an automated voice saying "Goodbye" and then the line went dead. Not sure what that's all about.

Unknown Caller
22 May 2025

They called me and claimed to be HMRC

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How to Block This Number

On iPhone

  1. Open the Phone app and go to Recents
  2. Find the number 07521 235415 and tap the info icon (i)
  3. Scroll down and tap Block this Caller
  4. Confirm by tapping Block Contact

On Android

  1. Open the Phone app and tap the 3-dot menu
  2. Go to Call history or Recents
  3. Long press on 07521 235415
  4. Select Block number or Block/report spam

On Landline Phones

Several options are available for UK landlines:

  • BT Call Protect - free for BT customers
  • TalkTalk CallSafe - free for TalkTalk customers
  • Call blocking devices like CPR Call Blocker (available on Amazon)

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