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SMS short code

51503

Last activity 1 day ago

Neutral0/100
0 community reports1 verified registry assignment

Who uses short code 51503?

8x8 OTP

Canada

Registry verified
Support phone
16562211521
Registry checked
September 9, 2026

Source: Canadian Telecommunications Association (txt.ca). A legitimate registry assignment does not prove every message claiming to use that brand is legitimate.

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51503 SMS short code — 8x8 OTP · ScamCallCheck