is there any particular symptom for my decision of changing it into 177? because so far out of the years i've used that IP i've yet to encounter a site that rejects me.
It's rather simple if you know the technical details

let me explain this to you in detail:
The combination of router (as the routing instance), DNS (for IP lookup) and your IP choice is the problem that breaks your request for this specific site... in your private network you can give yourself any IP range you want (with some exceptions of course

) The router knows which address range belongs to your private network and to the "outside". Let's say you have a request for the site "xyz.com". Your browser asks the DNS server which IP belongs to this url and delivers you an IP 177.1.0.3. Let's say your IP range for your local network is from 177.1.0.2 till 177.1.0.254. Now your browser sends the request for 177.1.0.3 to the router. Your router doesn't know that you want an external site but knows that this IP belongs to your private space. So the router will never ask your ISP to deliver data from "xyz.com" but asks your local network - here the PC with the IP 177.1.0.3 - for the homepage data.
To prevent these conflicts there are local address ranges that you can freely use:
10.xxx.xxx.xxx/8
172.16-31.xxx.xxx/12
192.168.xxx.xxx/16
I hope this explanation will help you understand your issue
