Contact

Question

1234-5678
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What does the above mean? Was 'Contact' used as a noun or as a verb?

1. Contact 1234-5678.
2. Contact us at 1234-5678.
3. Contact the phone [phone].
4. Contact the phone number 1234-5678.
5. Contact at phone number 1234-5678.
[Which one is correct?]

Answer 1

In all those sentences, “contact” is a verb

Only #2 would be correctly used.