or 0511 87989898 (as a single block after the area code)
So the cleanest is:
+49 511 87989898
If this is a (based on the 0511 area code for Hanover ), the correct formatting would be: 0511 87 9898 98
But if you want to keep it readable for local dialing in Germany: or 0511 87989898 (as a single block after
The proper formatting for the phone number depends on the country/region you're in. 0511 87 9898 98