| Title |
Test
Find
Class B Network Numbers
|
| Expression |
^(172\.1[6-9]|2[0-9]|3[0-1|\.[0-9]|[1-9][0-9]|[1-2][0-5][0-5]\.[0-9]|[1-9][0-9]|[1-2][0-5][0-5])$ |
| Description |
This is a set of 16 contiguous class B network numbers or a 16-bit block of ip address space as reserved by the IANA. RFC 1918 compliant. |
| Matches |
172.16.0.0 | 172.31.255.255 |
| Non-Matches |
10.0.0.0 | 10.255.255.255 | 192.168.0.0 | 192.168.255.255 |
| Author |
Rating:
Not yet rated.
tedcambron
|
| Source |
|
| Your Rating |
|
Title: second trick
Name: gianmaxfactor
Date: 1/9/2014 5:00:34 AM
Comment:
at the moment the best I have generated is
REGEXP FOR CLASS A NETWORKS : (10)(\.([2][0-5][0-5]|[1][0-9][0-9]|[1-9][0-9]|[0-9])){3}
REGEXP FOR CLASS B NETWORKS : (172)\.(1[6-9]|2[0-9]|3[0-1])(\.([2][0-5][0-5]|[1][0-9][0-9]|[1-9][0-9]|[0-9])){2}
REGEXP FOR CLASS C NETWORKS : (192)\.(168)(\.([2][0-5][0-5]|[1][0-9][0-9]|[1-9][0-9]|[0-9])){2}
It does validation also
Title: little trick (and correction)
Name: gianmaxfactor
Date: 1/9/2014 4:02:10 AM
Comment:
in my case it works better as
^(172)\.(1[6-9]|2[0-9]|3[0-1])\.([1-2][0-5][0-5]|[1-9][0-9]|[0-9])\.([1-2][0-5][0-5]|[1-9][0-9]|[0-9])$
moreover, in the original expression there is an error: 3[0-1| instead of 3[0-1]
