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International Numbering Plans

International Numbering Plans

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Information on phone number range +44 20 8570XXXX Number billable as geographic number Country or destination United Kingdom City or exchange location London Original network provider* BT *) Number portability has not been taken into account

Also the STD Code checks out on here.

STD WIZZARD -Find Dialing Codes for the UK

STD Wizard Standard Trunk dialling Code For The UK