Who rang me in the UK - Who Calls You UK Reverse Phone Number Lookup Report a number

020 4578 3803 +44 20 4578 3803

Landline number from London, range allocated to Belgacom International Carrier Services SA · Also written +44 20 4578 3803

Reported as spam

020 4578 3803 has 1 report on Who Calls You: 1 marked as spam, 0 as safe. Last report 7 hours ago.

Did 020 4578 3803 call or text you? Tell others in a few seconds:

It was spam or a scam It was genuine Not sure Read 1 report
1Report · read ↓
100%Marked as spam
5Lookups, last 30 days
10 Nov 2026First reported

About 020 4578 3803

020 4578 3803 is a UK landline number from London (area code 020). It sits in the block 020 4578 xxxx, which Ofcom allocated to Belgacom International Carrier Services SA on 20 August 2021. 3 other numbers from that block have reports on Who Calls You, 67% of them marked as spam. In the last 30 days it was looked up 5 times on Who Calls You, all in the past week, most recently today. It has one report, sent on 10 November 2026, describing it as scam or fraud. Calling it back costs the same as a normal UK call. We first listed it on 6 November 2026.

Number details

UK format
020 4578 3803
International
+44 20 4578 3803
No spaces
02045783803
No spaces with +44
+442045783803
Number type
Landline
Location
London
Area code
020
Range allocated to
Belgacom International Carrier Services SA

Cost to call: Normal rate · Landline (02). A normal UK landline call, included in the minutes of most landline and mobile plans. UK call costs

Landline numbers for London (020), Cardiff (029), Northern Ireland (028) and a few other areas. Calls cost the same as a normal UK landline call.

Network details come from UK numbering allocations. The number may have moved to another provider since, and this does not show who made a call.

020 4578 3803 - who called me from 020 4578 3803? Landline phone number from London, caller reports and spam check

Numbers in the same range (020 4578 xxxx)

020 4578 3803 is in the number block 020 4578 xxxx (10,000 numbers), allocated by Ofcom to Belgacom International Carrier Services SA on 20 Aug 2021.

On Who Calls You, 3 other numbers from this block have 3 reports in total, 67% marked as spam.

Companies and call centres often use numbers from one block, so reports about nearby numbers can be a useful hint. They are not proof about this number: blocks are shared, and numbers can be moved to another provider.

Recent activity

Last 30 days: 5 lookups and 1 report on Who Calls You.

Hover or tap a bar to see that day's reports.

SpamSafeNot sureBar height = reports that day

Reports about 020 4578 3803

1 report · 100% say spam

1 spam 0 safe 0 not sure

Scam or fraud 1

⚠ These reports describe a known scam: Amazon and tech support scam How it works and what to do.
Spam Scam or fraud · Phone call

Claimed to be Sky Broadband and offered a 40% discount on my plan

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Report 020 4578 3803

How did they contact you?
What was it?

Do not include names, addresses or other personal details. Read our rules.

What you should do

  • Do not share personal or bank details with an unexpected caller. Banks, HMRC and the police never ask for PINs, passwords or one-time codes.
  • Do not call back blindly. If the caller claims to be a company, contact it on the number from its official website, your card or a letter. For your bank you can call 159. Should you call back an unknown number?
  • Block the number if the calls are unwanted (see below).
  • Report it above, and report scams to Action Fraud. Forward scam texts to 7726 for free.

Caller ID can be faked. Scammers can make any number appear on your screen, including real numbers of real businesses or people. A report here is information to help you decide, not proof of who called.

Questions about 020 4578 3803

Who called me from 020 4578 3803?

020 4578 3803 is a UK landline number from London, range allocated to Belgacom International Carrier Services SA. 020 4578 3803 has 1 report on Who Calls You: 1 marked as spam, 0 as safe. It is also written as +44 20 4578 3803, 02045783803 or +442045783803. We do not show who owns a number. Caller ID can be faked, so check the reports and never share personal details with a caller you do not know.

Is 020 4578 3803 a scam?

1 of 1 people who reported 020 4578 3803 marked it as spam or unwanted (100%). Reports are personal experiences, not proof. If a caller asks for money, codes or bank details, hang up and contact the organisation on its official number.

How do I block 020 4578 3803?

On iPhone open Recents, tap the (i) next to the number and choose Block Caller. On Android open the call log, press and hold the number and choose Block. On a landline, ask your provider about free call blocking such as BT Call Protect.