020 4516 1415
SpamUnknown number caller id show don't speak
2 reports
• Last report 42 minutes ago
This number is a non-geographic landline number operated by Colt Technology Services. The overall user rating for this number is Negative. The number 03305510604 has been searched 355 times, with 6 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: Negative
- User reports: 6 user reports
- Searches: 355
- Last reported: about 1 month ago
- First reported: about 2 months ago
- Typical call time: before 11am (91% of calls)
Number profile
- UK format: 0330 551 0604
- International: +443305510604
- Number type: Non-geographic landline
- Carrier: Colt Technology Services
- Area: Non-geographic
- Area code: 0330
- Trending since: 20 May 2026
User Reports (6)
Your reports help others decide whether to answer calls from this number. Share your experience to help the community!
Scam/Fraud
1 month ago
My phones automatic scam blocker won’t let it through, but they keep trying.
Scam/Fraud
2 months ago
They called three times pretending to be three network. I rejected the calls after the first ones
Scam/Fraud
2 months ago
Claimed to be ‘three mobile’ apparently my services would be cut off tomorrow if I didn’t give them some security information, told them they were scamming me and they could something …off , low and behold , phones still fine two days later. Beware
Reported locations
Reported from 21 UK cities
Shepton Mallet, Clayton-le-Woods, Ashford, Pitstone, London, Maidstone, Uxbridge, Sheffield, Brixton Hill, Fazakerley, Haddington, Middlesbrough, Dundee, Leeds, Glenrothes, Shadwell, Harlesden, Cardiff, West Wickham, Hayes, Welwyn Garden City
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 0330 551 0604 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 0330 551 0604
- 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
07800 434444
Scam/FraudRecorded message saying that I had an unauthorised debit from my credit card (one of which I don’t have). Claimed to...
1 report
• Last report about 1 hour ago
07985 776739
Unknown CallerUnknown caller
1 report
• Last report about 1 hour ago
01339 336160
Scam/FraudThis caller is not an EE agent. He is a scammer. I fell for this unfortunately
2 reports
• Last report about 1 hour ago
0121 512 2300
Unknown CallerCalled but noone on the line when I answered. Have blocked the number.
3 reports
• Last report about 1 hour ago
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Call Costs
Calling 03305510604 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 03305510604 directly.
International callers should dial +44 330 551 0604 or 0044 330 551 0604. No leading zero is required when dialling abroad, e.g., +44(0)3305510604.