Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym DNIS is...

DNIS is

Dialed Number Identification Service
Directory Number Identification Service

More Meanings For DNIS:

Dialed Number Identification Service
Directory Number Identification Service
Dialed Number Identification System
Dialled Number Identification Service
Disability News And Information Service
Ditiondialed Number Identification Service

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