Find out my DNS servers IP assigned by ISP

How to find the DNS IP address provided my ISP. I need this without logging into the router. I have a wireless router from that I get IP and that is connected to the router provided my ISP. That IP is

For my PC obviously I get (Gateway - wireless router) as my DNS. I can get my public IP using kind of sites. But How I can find the DNS IP addresses assigned by ISP without logging into the router/modem. Can I get those from for DNS trace websites or by some commands from the PC inside with private IP?
Raj TAsked:
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Bryant SchaperCommented:
I cannot see a way, your internet comes into a DSL/Cable router I assume, so you cant simply wireshark the traffic, call the ISP?

Do you need this info specifically, or could you just use another public DNS?

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Hypercat (Deb)Commented:
Probably going online and looking it up is going to be your best bet.  A lot of ISPs publish their DNS information on their website in the Help section for their users.
Raj TAuthor Commented:
I should have mentioned the reason. I can get the information by getting into my router or calling my ISP. But I have few users in my society having trouble..When we connect to one of the other service provider for our society we get connected to their UK gateway instead of India gateway...They decided the gateway based on the DNS we are coming from not the IP we use....Now I have to collect all the DNS IP assigned by ISP for all in our society and see what is the issue...I cannot ask all of them to go to the router....I have to give some simple method.
Hypercat (Deb)Commented:
Not sure how you're going to resolve that.  Is everyone in your society at the same site using the same router/gateway?  Would it be possible to create shortcuts for them that point to the correct website by IP address, rather than depending on the service to decide where you should connect?
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