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020 3443 9452 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, England. The overall user rating for this number is Negative. The number 02034439452 has been searched 413 times, with 5 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 5 user reports
  • Searches: 413
  • Last reported: 5 months ago
  • First reported: 6 months ago
  • Typical call time: before 3pm (96% of calls)

Number profile

  • UK format: 020 3443 9452
  • International: +442034439452
  • Number type: Landline
  • Carrier: Colt Technology Services
  • Area: London
  • Area code: 020

User Reports (5)

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

Scam/Fraud
05 Dec 2025

Pretend to be from Three network and wanted my email address and details.

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Scam/Fraud
01 Dec 2025

Say it 3 callings and offer phone deals. I am not with 3

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Unknown Caller
01 Dec 2025

Scam. Pretending to be from Three Network to upgrade my phone. I am not a Three customer.

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Scam/Fraud
01 Dec 2025

Really bad scammers, need a new job!

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Spam
28 Nov 2025

Claiming to be three phone network and rang me multiple times in the day.

Caller: Emma
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What type of call was it?

Reported locations

Reported from 21 UK cities

Hollinwood, Sheffield, Rhosllannerchrugog, London, East Ham, Clerkenwell, Allington, Portsmouth, Manchester, London (Shadwell), Birmingham, Peover Superior, Holbeck, Lower Kingswood, London (South Bank), Cottingham, Parkstone, Blackburn, Staverton, Harlesden, Solva

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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 3443 9452 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 3443 9452
  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 02034439452 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 02034439452 directly.

International callers should dial +44 20 3443 9452 or 0044 20 3443 9452. No leading zero is required when dialling abroad, e.g., +44(0)2034439452.