+ plus 加号

country code 国码

area code 地区码

phone number 电话号码

Will he be in the office tomorrow morning? 

他明天早上会在办公室吗？

What time could I reach him? 

我几点可以联系到他？

I’ll try and get him on his cellphone. 

我会试着用手机和他联系看看。

I must have the wrong number, sorry for bothering you.

我一定是打错电话了，对不起打搅你了。

I’m afraid you’ve got the wrong number.你可能打错了。

Could I check the number? Isn’t it 6548-4290?

我可以确认下号码吗？是不是6548-4290？