NoCall

+44 20 3957 8520

Risk level: High

Add as a preferred sourceDownload onGoogle PlayDownload onApp Store

Who is this? Spam, telemarketing or a legitimate call? Community reports in United Kingdom.

High
Risk level
—
Category
0
Spam reports
—
Last report

AI Analysis

Limited information: Multiple reports indicate scam attempts impersonating UK mobile providers (O2, Tesco Mobile) with aggressive or unprofessional demeanor, offering discounts or claiming overdue accounts. Evidence suggests malicious intent.

Likely purpose: Scam/Fraud: Impersonating UK telecom providers to trick victims into divulging info or paying non-existent debts.

Most common user complaints

  • Claiming to be from O2/O2 offering 20% discount
  • Aggressive and unprofessional demeanor
  • Impersonating Tesco Mobile for loyalty discount
  • False claims of overdue account
High dangerBlockImpersonation detectedNinguna (Impersonación de O2, Tesco Mobile)TelecommunicationsMissed call

AI analysis: 10 Jul 2026

Summarize this NoCall number with

ChatGPTClaudeGrokPerplexityGoogle AI

Information based on community reports and automated analysis. It may contain errors or be out of date, and is not legal advice or a verified accusation against the number's owner.

GB

United Kingdom

Operator information

Country:
GBUnited Kingdom
Prefix:
+44
Type:
Other
Operator:
EE, O2, Vodafone, Three

Recent searches

3 this week

Last 7 days

Community comments

9
Anonymous

Today Persistent sales calls, and on top of that Always busy when you call back

Anonymous

Repeated nuisance calls!!

Anonymous

Yesterday Rings once and hangs up

Anonymous

Today Repeated nuisance calls; also from other numbers too

Anonymous

yet another one: Spam at all hours, plus every single day ugh.

Anonymous

Called me twice, ignored the first call and the second time i answered. Lady with very poor mic quality and an Indian accent told me she was calling from Tesco Mobile to give loyal customers a 20% discount. Her entire demeanour was aggressive and unprofessional. Definitely a scam

Anonymous

Was a caller center agent claiming to be working for O2, and telling me they need to settle some amount on my account. I logged in and checked and there was no notification or amount outstanding

Anonymous

This was someone pretending to be O2 about a phone contract billing due. It was a total scam

Anonymous

Claiming g to be from o2 offering 20% discount

Report this number

What happened?

Signal summary for +44 20 3957 8520

+44 20 3957 8520 belongs to the 203 prefix and is classified as unclassified calls. This page combines no approved reports and 9 public comments to explain the risk level.

Frequently asked questions

Who calls from +44 20 3957 8520?
+44 20 3957 8520 is a phone number with the 203 prefix in United Kingdom. It has no spam reports yet, but you can check other users' comments below. Check the comments to find out who might be behind this call.
Is +44 20 3957 8520 a spam number?
There aren't enough reports yet to confirm whether +44 20 3957 8520 is spam. Check the risk score and the community comments.
Is it safe to call +44 20 3957 8520 back?
If you don't recognise the number and it has negative reports, it's best not to call +44 20 3957 8520 back. Avoid sharing personal or banking details with unknown numbers.
How can I block +44 20 3957 8520?
On iPhone, go to Recents in the Phone app, tap the (i) next to the number and choose 'Block this Caller'. On Android, long-press the number in your call history and select 'Block number'. You can also use the NoCall app to automatically block calls like +44 20 3957 8520.
Where can I report a suspicious call?
You can report +44 20 3957 8520 directly on this page using the report button. Your contribution helps other users identify unwanted calls.