Cisco Router 2600

[qilong]

Recently I just setup a new LAN for our company. I successfully setup the router, but the problem I facing now is, our ip is 210.187.24.0 - 255. I can use the ip address from 210.187.24.1 - 210.187.24.30 but any other ip address which greater than 210.187.24.31 and above cannot be use and surf. It also cannot ping the router ip.
So, maybe someone can help me ASAP, please.
Thanks.

 

[Guest_imported]

Check your subnet mask on your router and all of your machines. should use 255.255.255.0 if you are using single LAN.