The ServerName with domain with number has syntax error (3 replies)

Hello
Syntax problem with domain with number.
I made the domain with the number.
7lll.pl
And there was an error with the server name.
CMD bellow:
Sorry,
The ServerName '7lll.pl' has syntax error"
Characters accepted [a-zA-Z0-9.-]
Only letter or number at the beginning and at the end
. or - characters neither at the beginning nor at the end
. or - characters not followed by . or -
Switch cancelled
Press WNTER to continue.... "
Screenshot 1 - [goo.gl]
Screenshot 2 - [goo.gl]


Apache - 2.4.23
php - 5.6.25