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020 4623 1787 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 02046231787 has been searched 638 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: 638
  • Last reported: 3 months ago
  • First reported: 9 months ago
  • Typical call time: before 11am (90% of calls)

Number profile

  • UK format: 020 4623 1787
  • International: +442046231787
  • 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!

Unknown Caller
3 months ago

Bionic energy. They contact you after using a comparison site for energy.

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Telemarketer
3 months ago

its from Energy supplier website,, I looked up energy prices , now they are hounding

Caller: Bionic uk
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Legitimate
4 months ago

I had just been using an electricity comparison site - Bionic via Money Supermarket, so I'm guessing this was probably Bionic trying to tie me down. I didn't pick up.

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Scam/Fraud
11 Nov 2025

Pretending to be Bionic and sell Gas/Energy contracts

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Unknown Caller
02 Sep 2025

2 calls in 2 days - now blocked

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Scam/Fraud
29 Aug 2025

Unknown number no message blocked

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Unknown Caller
28 Aug 2025

this was a missed cal but since it has been searched 89 times previously, I guess it is not a legitimate call

Caller: woodcider
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What type of call was it?

Reported locations

Reported from 21 UK cities

Auckley, London, Backbarrow, Stoke-on-Trent, London (Shadwell), Corby, London (South Bank), Speke, Kenn, Fazakerley, Martlesham (Martlesham Heath), Romford, Marske, Portsmouth, Yeadon, Altrincham, Reading, Weymouth, Gloucester, Orgreave, Sedgefield

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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 4623 1787 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 4623 1787
  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.

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Latest reports

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Call Costs

Calling 02046231787 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 02046231787 directly.

International callers should dial +44 20 4623 1787 or 0044 20 4623 1787. No leading zero is required when dialling abroad, e.g., +44(0)2046231787.