ng-pattern for exclusion group of numbers

I have a list of exclusion numbers.

for example (400276|400615|402914|404625)

the pattern should not let me enter into the input any of these numbers as the first 6 digits example

400276123 .BAD. because the value init with a number to exclude

400277123 .OK

I try something like that

"^[^] (400|405)"

but is not working

how can I use a pattern for exclude this first 6 digits