020 3100 4100
Unknown CallerThis number called me 4 times on Teams at 7.03am local time 03/08/26 but I was not available to take it because I was...
4 reports
• Last report about 1 hour ago
This number is a landline operated by Colt Technology Services and located in London, UK. The overall user rating for this number is Neutral. The number 02031004100 has been searched 570 times, with 4 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: 4 user reports
- Searches: 570
- Last reported: about 1 hour ago
- First reported: almost 5 years ago
- Typical call time: before 11am (91% of calls)
Number profile
- UK format: 020 3100 4100
- International: +442031004100
- Number type: Landline
- Carrier: Colt Technology Services
- Area: London
- Area code: 020
User Reports (4)
Your reports help others decide whether to answer calls from this number. Share your experience to help the community!
Unknown Caller
1 hour ago
This number called me 4 times on Teams at 7.03am local time 03/08/26 but I was not available to take it because I was not logged on yet. I am in Perth, Western Australia.
Unknown Caller
6 months ago
This number calls me on Microsoft Teams. I am in Latvia.
Unknown Caller
24 Jul 2023
Called me the last days via Teams. Ich you answer you hear piano music.
Unknown Caller
22 Sep 2021
This number keeps calling me on microsoft teams I reside in South Africa and have no bussiness in England
Reported locations
Reported from 21 UK cities
Maidstone, Sheerness, Newcastle upon Tyne, London, Leicester, Llandudno Junction, Rochdale, Tranent, Bellshill, Birmingham, Bristol, Bromborough, Omagh, Rawmarsh, Wakefield, Feltham, Tayport, Risby, Willesden, Birkenhead, Elderslie
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3100 4100 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 3100 4100
- 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 registrationLatest reports
01492 454199
Unknown CallerRang once, I rang back and it said your through to asda and rang so I hung up sounds like a scam but not sure
1 report
• Last report about 8 hours ago
07888 873549
Unknown CallerHad 2 calls off them in 2 days. Left a voicemail both times 2 seconds long both an automated message saying “this is...
4 reports
• Last report about 10 hours ago
0151 203 0963
Scam/FraudAsked them how they got my number, told the I wad caller preference service registered. They didn't kniw what it was...
4 reports
• Last report about 11 hours ago
01206 984977
Unknown CallerCalls twice daily for a week including Sunday afternoon so almost certainly Scam?/fraud or a telemarketer
1 report
• Last report about 11 hours ago
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Recommended Guides
Call Costs
Calling 02031004100 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 02031004100 directly.
International callers should dial +44 20 3100 4100 or 0044 20 3100 4100. No leading zero is required when dialling abroad, e.g., +44(0)2031004100.