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0300 421 3528 Negative Who called me from this phone number?

Non-geographic • Gamma Telecom Holdings Limited
This number is a non-geographic landline number operated by Gamma Telecom Holdings Limited. The overall user rating for this number is Negative. The number 03004213528 has been searched 74 times, with 2 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 2 user reports
  • Searches: 74
  • Last reported: 28 days ago
  • First reported: 8 months ago
  • Typical call time: before 2pm (85% of calls)

Number profile

  • Number type: Non-geographic landline
  • Carrier: Gamma Telecom Holdings Limited
  • Area: Non-geographic
  • Area code: 0300

User Reports (2)

Your reports help others decide whether to answer calls from this number. Share your experience to help the community!

Unknown Caller
28 days ago

All my 0300 421 xxxx numbers are from Great Western Road, Hospital All different departments in Gloucester Royal Hospital

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Unknown Caller
13 Sep 2025

1st time call asked a person name who did not live here then tried to check the number they had rang,so I told them they should know as they had just rang it possible scam

Caller: Unknown
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What type of call was it?

Reported locations

Reported from 21 UK cities

Woolfardisworthy, Streatham, London, Langport, Sevenoaks, London (South Bank), London (Holborn), Cheltenham, Birmingham, Kennington, Staverton, Stoke Gifford, Meopham, Great Coates, Llangefni, Clubmoor, London (Shadwell), Evesham, Stoke-on-Trent, Shurdington, Caerphilly

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How to Block This Number

On iPhone

  1. Open the Phone app and go to Recents
  2. Find the number 0300 421 3528 and tap the info icon (i)
  3. Scroll down and tap Block this Caller
  4. Confirm by tapping Block Contact

On Android

  1. Open the Phone app and tap the 3-dot menu
  2. Go to Call history or Recents
  3. Long press on 0300 421 3528
  4. 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 registration

Latest reports

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Call Costs

Calling 03004213528 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 03004213528 directly.

International callers should dial +44 300 421 3528 or 0044 300 421 3528. No leading zero is required when dialling abroad, e.g., +44(0)3004213528.