01672 216448
LegitimateThey're a genuine company, Thermo Solar.
2 reports
• Last report 1 minute ago
This number is a non-geographic landline number operated by BT. The overall user rating for this number is Positive. The number 03456032821 has been searched 456 times, with 3 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: Positive
- User reports: 3 user reports
- Searches: 456
- Last reported: 10 months ago
- First reported: over 10 years ago
- Typical call time: before 3pm (93% of calls)
Number profile
- UK format: 0345 603 2821
- International: +443456032821
- Number type: Non-geographic landline
- Carrier: BT
- Area: Non-geographic
- Area code: 0345
User Reports (3)
Your reports help others decide whether to answer calls from this number. Share your experience to help the community!
Legitimate
06 Aug 2025
This is HSBC as my sister works there and called from there!
Unknown Caller
Liselotte
04 Nov 2015
This is NOT HSBC!!! I contacted HSBC from their website (via webchat) this evening and had it confirmed by a representative that this is fraudulent and possibly connected to other service providers (Vodafone etc) being compromised. The email was supposedly from my local branch! Share NO information with them. Report any calls and/or emails to the HSBC Customer Care team. (I've left this comment on multiple sites because the people calling are also apparently leaving comments, saying that it's a legit number. Contact HSBC first before responding to this number, or to emails.)
Caller: un-HSBC
Reported locations
Reported from 21 UK cities
Saint Neots, Southampton, Waltham Abbey, Eastleigh, London, Newcastle upon Tyne, Malton, Stoke-on-Trent, Chelmsford, York, Cardiff, Chapel Allerton, Rochdale, Dingle, Newark on Trent, Burton Latimer, Weymouth, Poplar, Blackwood, Belgrave, Chelsfield
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 0345 603 2821 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 0345 603 2821
- 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
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Recommended Guides
Call Costs
Calling 03456032821 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 03456032821 directly.
International callers should dial +44 345 603 2821 or 0044 345 603 2821. No leading zero is required when dialling abroad, e.g., +44(0)3456032821.