You don't need to be blunt but you do need to be clear, and by being casual, you can achieve a smooth request. Say something casual on the lines of "Hey, can I have your number to text you sometimes?" Simple. Then say thanks, and walk away. At this point, he'll anticipate your text, and you'll have his number.
How can you find someone's phone number?
Simply head to the White Pages website and plug in a person's name (or just last name) as well as their city, state, or ZIP code. If that person's name and phone number would appear in a paper phone book in that geographical area, you'll see it on this website.
Can I request a specific phone number?
Originally Answered: Can you request a specific phone number if it's not in use? You can always request. As to whether you can get it, that is another matter entirely. For “toll-free” numbers (800, 877, 866, 855 “area codes”), there is an active market place for buying and selling.