020 3455 1621
Also shown as:
- 020 3455 1621
- +44 20 3455 1621
AI Summary
Based on 5 community reports
Community Reports
5 verified reports
Cumulative spam score based on all reports up to each month. Higher percentage means higher reported scam risk. Cumulative spam score based on all reports up to each week. Higher percentage means higher reported scam risk. Cumulative spam score based on all reports up to each day. Higher percentage means higher reported scam risk.
Said they were doing an energy survey about lodt insulation. They asked me some questions but then wanted to know my age, when I asked what does my age have to do with the questions they hung up.
A silent phone call at 15.03 on the 26th of March.
When you say hello, nobody answers.
This number rang twice over 2 days, then went quiet.
Said they were my local energy advisor
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Help others by reporting what happened
About 020 3455 1621
What type of number is 020 3455 1621?
The phone number 020 3455 1621 (also written as +44 20 3455 1621) is a UK landline number originating from the London area in Greater London . Calls to this number are charged at standard UK landline rates, usually included in call packages.
Is 020 3455 1621 safe to answer?
Based on 5 community reports, this number has received mixed reports from our community. The current risk score is 52% .
Be cautious when answering calls from this number. Verify the caller's identity before sharing any information.
What should I do if 020 3455 1621 calls me?
If you receive an unexpected call from 020 3455 1621, consider the following:
- Don't answer immediately if you don't recognise the number – let it go to voicemail and see if they leave a message.
- Never share personal information such as bank details, passwords, or PINs with unknown callers.
- Be wary of urgency tactics – legitimate organisations won't pressure you to act immediately.
- Verify the caller by hanging up and calling the organisation back on their official number.
How to report a scam call
If you believe you've received a scam call from 020 3455 1621, you can take the following steps:
- Report the number using the form on this page to help warn others.
- Report to Action Fraud on 0300 123 2040 or at actionfraud.police.uk.
- Contact your phone provider to block the number.
- If money has been taken, contact your bank immediately.
- For ongoing harassment, contact the police on 101.
About number spoofing
Be aware that caller ID can be falsified (spoofed). Scammers may display 020 3455 1621 on your phone even though the call originates from a different number. If a caller claims to be from a bank, government agency, or other organisation, hang up and call them back using an official number from their website.
Disclaimer: CallerCheck UK has no affiliation with the owner of 020 3455 1621 or any related companies. Information on this page is based entirely on community reports and publicly available data. If you have been a victim of fraud, please contact Action Fraud or the police directly – we cannot investigate individual cases. Report accuracy depends on community contributions and may not reflect the current status of this number.
Is this your number? If you own this phone number and believe reports are inaccurate or false, you can submit a claim using the "Claim This Number" button in the sidebar to verify ownership and request a review.
Frequently Asked Questions
To block 020 3455 1621:
- iPhone: Go to Recents, tap ⓘ next to the number, then "Block this Caller"
- Android: Long press the number in Recents and select "Block number"
- Landline: Contact your provider (BT, Sky, Virgin) to enable call blocking
You can also register with the Telephone Preference Service (TPS) to reduce unwanted calls.
Safety Score
Details
- Tel Number
- 020 3455 1621
- Country
- 🇬🇧 United Kingdom
- Area
- London
- Type
- Geographic
- First Seen
- Today
Protection Guides
Location
London, United Kingdom
This number originates from the London area code region. The map shows the general geographic area, not an exact location.
Call Types
Breakdown of reported call reasons. Larger segments and bars represent a bigger share of reports.
Is this your number?
Claim ownership to manage reports
If you own this phone number and believe reports are inaccurate, you can submit a claim to verify ownership and request a review.
We'll verify ownership via callback or documentation
How to Block 020 3455 1621
- Open the Phone app and go to Recents
- Find 020 3455 1621 and tap the ⓘ icon next to it
- Scroll down and tap Block this Caller
- Confirm by tapping Block Contact
Alternatively: Settings → Phone → Blocked Contacts → Add New
- Open the Phone app and go to Recents
- Long press on 020 3455 1621
- Tap Block/report spam
- Confirm by tapping Block
Steps may vary slightly depending on your phone manufacturer
Contact your phone provider to block 020 3455 1621:
- BT: Use BT Call Protect (free service)
- Sky: Call 03442 414 141 to enable call blocking
- Virgin Media: Use the Virgin Media app or call 150
- TalkTalk: Enable CallSafe in your account settings
You can also register with the Telephone Preference Service (TPS) at tpsonline.org.uk to reduce unwanted calls.