020 8072 7510
Unknown CallerCDC one time pass code
26 reports
• Last report 10 minutes ago
This number is a landline operated by Colt Technology Services and located in London, England. The overall user rating for this number is Neutral. The number 02045839034 has been searched 140 times, with 2 user comments helping to identify the caller's intent.
Your comment helps others identify this number. Thank you for contributing!
At a glance
Community signals
- Community rating: Neutral
- User reports: 2 user reports
- Searches: 140
- Last reported: 7 months ago
- First reported: 7 months ago
- Typical call time: before 3pm (90% of calls)
Number profile
- UK format: 020 4583 9034
- International: +442045839034
- Number type: Landline
- Carrier: Colt Technology Services
- Area: London
- Area code: 020
User Reports (2)
Your reports help others decide whether to answer calls from this number. Share your experience to help the community!
Unknown Caller
11 Dec 2025
I’ve had this also. They call from various different numbers and they get very argumentative. Relentless at trying to get a conversation but also very difficult to block them when they use several numbers from different area codes but it’s the same woman!! Often there’s a crying baby in the background and she then “transfers me to her supervisor” which is an erratic male. Screams scam and has been escalated to sky
Scam/Fraud
02 Dec 2025
Said they were from Sky mobile wanting to send me a new sim card. They said other sky users were having problems with this type of sim card. The woman was very difficult to understand (VERY heavy Indian accent). As soon as I said I was the main holder of the Sky contract, she wanted to transfer me across to her supervisor. Whole thing stinks of scam. I'm now getting bombarded with texts from this number as I have blocked the calls.
Caller: Sara Tock
Reported locations
Reported from 21 UK cities
Mattishall, London, Wrexham, Doncaster, Pembroke Dock, Portishead, Exhall, Castle Vale, Cambuslang, Burnham-on-Crouch, Camberwell, Wigan, Middlesbrough, Staveley, London (Shadwell), Birmingham, Sheffield, Upton Lea, London (Shoreditch), Bristol, Marden
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4583 9034 and tap the info icon (i)
- Scroll down and tap Block this Caller
- Confirm by tapping Block Contact
On Android
- Open the Phone app and tap the 3-dot menu
- Go to Call history or Recents
- Long press on 020 4583 9034
- 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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Call Costs
Calling 02045839034 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 02045839034 directly.
International callers should dial +44 20 4583 9034 or 0044 20 4583 9034. No leading zero is required when dialling abroad, e.g., +44(0)2045839034.