locating server IP of my ISP

I am connecting to internet through some ip provided by my mobile operator in range 100.xxx.xxx.xxx but when i surf on internet as some site directly gives me my ip address as 2xx.xxx.xxx.xxx? i want to ask then which is main server in mobile provider end. and how both class A and C are residing in same network.
i am newbie in LAN setups or i can say dont know how to configure web server with different class addresses. can anybody help to understand me this topology of my provider.Also can you tell me where is exactly web server should be? Is that possible to setup Network webserver with different class address.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Lee W, MVPTechnology and Business Process AdvisorCommented:
Your provider probably has you going through a proxy server or a NAT device - both will alter the IP seen on the internet.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
OS Security

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.