Markdown no break (nobr)?

I've got a phone number in my markdown that tends to break over the end of the line. In HTML I could wrap it in a <nobr> tag to have it keep together properly. What is the correct way to do this in markdown?

You can use non-break hyphen character ( ‑ )

1‑111‑111‑1111

for

1-111-111-1111

Or you could need the phone number format with spaces in between, then use no-break space character (   )

1 111 111 1111

for

1 111 111 1111