What is identity of my local ip on internet..?

Dear Networking/C++ programmers,

What is identity of my local ip on internet..?

mean how can anybody contact, my system via internet...(mean what will be ip routing) to reach my system....

Though I am aware that ...

C:\>nslookup myip.opendns.com. resolver1.opendns.com
Server:  resolver1.opendns.com
Address: xxx.xx.xxx.xxx

Non-authoritative answer:
Name:    myip.opendns.com
Address:  xxx.xxx.xx.x//will give me external(router) ip...

C:\>nslookup
Default Server:  UnKnown
Address:  xx.x.x.xxx//will give DNS

C:\Users\Administrator>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : xxx
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
   Physical Address. . . . . . . . . : xx-xx-xx-xx-xx-xx
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : xxxx::xxxx:xxxx:xxxx:xxxx%xx(Preferred)
   IPv4 Address. . . . . . . . . . . : xx.xx.xx.xx(Preferred)//will give me local ip behind my DNS...

How can anyone, may attempt to contact me....URL/NetBios/FQDN?

-Pankaj