0330 174 5096
Unknown CallerMissed the call, rang back twice - incorrect number response.
3 reports
• Last report 18 minutes ago
This number is a landline operated by Colt Technology Services and located in Norwich, UK. The overall user rating for this number is Negative. The number 01603577288 has been searched 115 times, with 3 user comments helping to identify the caller's intent.
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At a glance
Community signals
- User reports: 3 user reports
- Searches: 115
- Last reported: 8 months ago
- First reported: 9 months ago
- Typical call time: before 10am (88% of calls)
Number profile
- UK format: 01603 577288
- International: +441603577288
- Number type: Landline
- Carrier: Colt Technology Services
- Area: Norwich
- Area code: 01603
User Reports (3)
Your reports help others decide whether to answer calls from this number. Share your experience to help the community!
Unknown Caller
12 Sep 2025
rough voice called about window replacements. When I said I ws still in the sold subject to contract stage and not yet in the house he abruptly said he could not deal with me and I should call again when i had the keys. He didnt wait for me to reply but just ended the call. then I heard him talking to his mate, sounded very dodgy. wouldnt want to deal with them. very unprofessional.
Telemarketer
02 Sep 2025
Called me 8 times in one day from differing numbers.
Reported locations
Reported from 21 UK cities
London (Shoreditch), Seaham, London (Shadwell), Chapel Allerton, Northampton, St Helens, Hove, Exeter (Sowton), Manchester, Liverpool, Cardiff, Marsden, Brighton and Hove, Ashford, Belgrave, Burnley, Hereford, Richmond, Ripon, Grays, Bottesford
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 01603 577288 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 01603 577288
- 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 01603577288 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 01603577288 directly.
International callers should dial +44 1603 577288 or 0044 1603 577288. No leading zero is required when dialling abroad, e.g., +44(0)1603577288.