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020 4621 3513 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 02046213513 has been searched 279 times, with 6 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 6 user reports
  • Searches: 279
  • Last reported: 4 months ago
  • First reported: 5 months ago
  • Typical call time: before 3pm (93% of calls)

Number profile

  • UK format: 020 4621 3513
  • International: +442046213513
  • Number type: Landline
  • Carrier: Colt Technology Services
  • Area: London
  • Area code: 020

User Reports (6)

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

Unknown Caller
4 months ago

I was on my phone it went to answer machine. They did not leave a message. So i blocked them.

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Spam
5 months ago

Called once. Didn’t answer.

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Spam
31 Dec 2025

I answered and they rang off straight away.

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Spam
29 Dec 2025

Spam. Was expecting a different call so answered. Told me I have an O2 contract. I don't. Told her I don't. She tried to convince me that I do. I don't, I told her I don't several more times. She said she would update her system.

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Unknown Caller
29 Dec 2025

Spam. Was expecting a different call so answered. Told me I have an O2 contract. I don't. Told her I don't. She tried to convince me that I do. I don't, I told her I don't several more times. She said she would update her system.

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Telemarketer
22 Dec 2025

Rang twice in a day. Missed first call answered second. A foreign lady told me she's calling as I'm with O2. As soon as I said I wasn't with O2 she hung up.

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What type of call was it?

Reported locations

Reported from 21 UK cities

Felbridge, Birmingham, Carshalton, Marshalswick, Wavendon, Liverpool, London (Belsize Park), Salford, North Scarle, Barry, Morden, Bolton, Leicester, Detling, Maldon, Edinburgh, Wallasey, Watford, Parkstone, Old Swan, Coventry

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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 4621 3513 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 4621 3513
  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 02046213513 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 02046213513 directly.

International callers should dial +44 20 4621 3513 or 0044 20 4621 3513. No leading zero is required when dialling abroad, e.g., +44(0)2046213513.