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020 3781 1505 Negative Who called me from this phone number?

London • Firstcom Europe Limited
This number is a landline operated by Firstcom Europe Limited and located in London, England. The overall user rating for this number is Negative. The number 02037811505 has been searched 40 times, with 2 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 2 user reports
  • Searches: 40
  • Last reported: 5 months ago
  • First reported: 6 months ago
  • Typical call time: before 2pm (93% of calls)

Number profile

  • UK format: 020 3781 1505
  • International: +442037811505
  • Number type: Landline
  • Carrier: Firstcom Europe Limited
  • Area: London
  • Area code: 020

User Reports (2)

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

Scam/Fraud
04 Dec 2025

Pretending to be from Three, but didn’t know my name (obviously not then). Tried to hack my account, so Three sent me a OTP. Expected me to tell them the OTP.

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Unknown Caller
28 Nov 2025

They said they were calling from 3 Mobile network. I hung up.

Caller: Jenny
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What type of call was it?

Reported locations

Reported from 21 UK cities

London, Newbury, Stockport, Stourport-on-Severn, Barrow upon Humber, Willerby, London (South Bank), Stepney, Derby, Harrow on the Hill, Harlesden, South Croydon, Liverpool, Chapel Allerton, Burngreave, Manchester, Poplar, Bournemouth, Chelmsley Wood, London (City of London), Britwell

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How to Block This Number

On iPhone

  1. Open the Phone app and go to Recents
  2. Find the number 020 3781 1505 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 020 3781 1505
  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)

Register with TPS (Telephone Preference Service)

The TPS is a free service for UK consumers that allows you to opt out of unsolicited sales and marketing calls.

Learn more about TPS registration

Latest reports

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Call Costs

Calling 02037811505 from a landline may cost up to 16p per minute. Many providers charge a 23p call set-up fee. Call packages often include these types of calls. You might not incur additional charges for calling this number, depending on your provider.

Dialling Instructions

Local UK callers can dial 02037811505 directly.

International callers should dial +44 20 3781 1505 or 0044 20 3781 1505. No leading zero is required when dialling abroad, e.g., +44(0)2037811505.