Where is this phone number from please 002348084348944?

Is it Nigeria?

Where did this strange phone number come from and why are they calling me?

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Answers:    It's Nigeria, specifically a GSM cellular number on the Vmobile network.

Details of the Nigerian numbering plan and current code assignments here:

http://www.ncc.gov.ng/NNP/National_Numbe...

Can someone dial this number and consent to me know who it is?

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This looks similar to a Nigerian phone number, as seen from the UK. For niceties, google "country code 234".