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020 3977 8842 Negative Who called me from this phone number?

London • Colt Technology Services
This number is a landline operated by Colt Technology Services and located in London, UK. The overall user rating for this number is Negative. The number 02039778842 has been searched 257 times, with 7 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 7 user reports
  • Searches: 257
  • Last reported: 9 months ago
  • First reported: 10 months ago
  • Typical call time: before 3pm (98% of calls)

Number profile

  • Number type: Landline
  • Carrier: Colt Technology Services
  • Area: London
  • Area code: 020

User Reports (7)

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

Scam/Fraud
28 Jul 2025

Pretending to be network provider ect

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Scam/Fraud
25 Jul 2025

Claimed to be from Vadafone regarding poor services/signal happened recently. Be aware.

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Unknown Caller
24 Jul 2025

I am Brian, calling from lebara phones. asked about my plan and data. I hung up

Caller: Brian
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Scam/Fraud
22 Jul 2025

pretended to be my phone service provider and scammed me into transferring money!!! be careful with this one

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Scam/Fraud
19 Jul 2025

It rang 5 times in quick succession and I didn't answer as I don't know anyone in London. I put the number in a internet search and found this site. So glad I didn't answer the call. Thank you!

Caller: A Lady from the north
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Scam/Fraud
15 Jul 2025

Claimed to be vodafone but could not evidence.

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Unknown Caller
14 Jul 2025

Caller said it was Sky Television. Did not object when I said I was not expecting the call and had no evidence it was Sky and I was disconnecting.

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What type of call was it?

Reported locations

Reported from 21 UK cities

Bishopbriggs, Westminster, Brighton, Royal Leamington Spa, Oxford, Crowthorne, London, Birmingham, Luddenden Foot, Netherseal, Slough, Portswood, Sheffield, London (Shadwell), Adwick le Street, Blackwood, London (South Bank), Glasgow, Rastrick, London (Mortlake), Hillingdon

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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 3977 8842 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 3977 8842
  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 02039778842 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 02039778842 directly.

International callers should dial +44 20 3977 8842 or 0044 20 3977 8842. No leading zero is required when dialling abroad, e.g., +44(0)2039778842.