You can ring Directory Enquiries at Etisalat by dialling 181.
Be aware that their database isn’t as extensive and up-to-date as it is in the Western world!
For example, I rang Directory Enquiries to get the telephone number for the Adidas Outlet Store in the centre of Al Ain so I could find out their opening hours. The person I spoke with said the only Adidas they could find was in Dubai!
Yet there are 3 Adidas Outlet Stores in Al Ain: one in the centre, a second in Al Ain Mall and a third in Bawadi Mall.
I mentioned this to the manager of the first store when we later visited them, so he might have fixed this by now.
You also may need to ring a couple of times to get the exact number you want: when I rang one time to get the number for the Jashanmal Store in Al Ain, I was given the head office number in Abu Dhabi.
What this means for you: don’t rely on Directory Enquiries here as much as you would back home: think ahead and get telephone numbers in advance wherever possible: from a store when you visit, or from friends/colleagues.