Create regex phone number validating all number except one format

Question

I have a regex which authorized all phone number in the format :

0nxxxxxxxx with n between 1-9 and 8 times x between 0-9

My regex is

0[1-9][0-9]{8}

Now, I want to exclude the number which begin by 0590xxxxxx. So, for example

0123456789 => true
...        => true
0590123456 => false

How can I modify my regex to do this ?

I have edited your title. Please see, "Should questions include “tags” in their titles?", where the consensus is "no, they should not". — John Saunders
– John Saunders, Commented May 23, 2015 at 10:43

karthik manchala · Accepted Answer · 2015-05-23 14:09:26Z

1

Just add negative lookahead (?!0590) before your pattern:

(?!0590)0[1-9][0-9]{8}

See RegexStorm Demo

Improvements:

I suggest you to use start ^ and end $ anchors if you want to avoid matches like abc0123456789abc or use word boundaries \b
you can replace [0-9] with \d

Improved regex:

^(?!0590)0[1-9]\d{8}$

edited May 23, 2015 at 14:09

answered May 23, 2015 at 10:49

karthik manchala

13.7k1 gold badge34 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

user3656665 Over a year ago

Thanks, I didn't know the negative lookahead. I need the ^ and $ anchors like you suggest. The problem is when I add them to the pattern, it never matches with a correct input RegexStormDemo

karthik manchala Over a year ago

Yes.. something is wrong.. but it will work.. checked with another online tester :)

user3656665 Over a year ago

Indeed, it works, it's exactly what I needed. Thanks

Collectives™ on Stack Overflow

Create regex phone number validating all number except one format

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related