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020 3996 3597 Negative Who called me from this phone number?

London • DIDWW Ireland Limited
This number is a landline operated by DIDWW Ireland Limited and located in London, England. The overall user rating for this number is Negative. The number 02039963597 has been searched 512 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: 512
  • Last reported: 5 months ago
  • First reported: 5 months ago
  • Typical call time: before 2pm (91% of calls)

Number profile

  • UK format: 020 3996 3597
  • International: +442039963597
  • Number type: Landline
  • Carrier: DIDWW Ireland Limited
  • 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!

Scam/Fraud
09 Dec 2025

They appeared to have a lot of information about me. Wanted to lower my direct debit payment but wanted my bank details. Asked them to send me a letter and hung up. Didn't want to give a stranger my bank details.

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Unknown Caller
09 Dec 2025

i just had the same call knew straight away was scam as ive not taken any insurance with thames water

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Scam/Fraud
09 Dec 2025

Asking to set up a direct debit to pay water monthly

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Unknown Caller
09 Dec 2025

Fake call about Drain Insurance asking to confirm details. Scam

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Unknown Caller
09 Dec 2025

I had a phone call stating they were my water company trying to get me to do a direct debit payment set up. Very convincing

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Telemarketer
09 Dec 2025

They hung up

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What type of call was it?

Reported locations

Reported from 21 UK cities

Upminster, Kings Lynn, Leeds, Streetly, Bournemouth, Darlington, Milton Keynes, London, Sheffield, Snaith, Cotgrave, Lydbrook, Dagenham, Hillingdon, Sunbury-on-Thames, Poole, Benwell, Preston, Hawthorn, London (Shadwell), West Drayton

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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 3996 3597 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 3996 3597
  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 02039963597 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 02039963597 directly.

International callers should dial +44 20 3996 3597 or 0044 20 3996 3597. No leading zero is required when dialling abroad, e.g., +44(0)2039963597.