"Contact" could be used as a noun. It could be used as plural as in-
The more contacts the cloth has with the dirty surface, the more sploiled it gets.
"Contact details" is different. "Contact details" means the details like (1) address, (2) phone number, (3) email Id etc.
I often find the people using "contacts" for "contact details" as in-
I have lost my cell phone, so the contacts have been lost.
Evident enough, what the speaker wants to convey is that he has lost the contact details that were stored in his cell phone.
My question is: can "contacts" be used for "contact details"?
Best Answer
Let's consider one of the definitions of Contact (noun)
[Dictionary.com]
So if you lose your phone, you eventually lose all your contacts figuratively since you won't be able to communicate with them.
This seems to be a legitimate usage, possibly doubling as a valid truncation of "Contact Details". Most smartphone device OEMs label the list of the saved phone numbers as "Contacts" as opposed to "Contact Details". Therefore the answer to your question is YES!