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  1. #1


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    Why do I have 2 different IP adresses?
    Why is it that when I connect my computer to my cable modem, my ip address is completely different than connecting my computer to my netgear wireless router? I checked both on What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... and they turned out to be different ip addresses. The ip address started with only 2 digits before the period (69.xxx.xx.xxx) does that have to do with anything?

    Is there any way I can change the IP address when I'm connected to my netgear wireless router so that when I go on What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... it shows a different ip address?

    EDIT:
    When I first checked my ip address from the link above when I was connected to my router. It was (69.xxx.xx.xxx). Then when I plugged my computer to the cable modem the ip address was (173.x.xxx.xx). Then I connected back to the netgear router and I checked the IP address again and it was the same as before (69.xxx.xx.xxx). I tried turning off the modem and router on and off and nothing changed.

  2. #2

    dtravis7's Avatar
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    You want your computers IP the same as the one From your cable provider? That would defeat the purpose of your router. Is the IP on your computer like 192.168.1.100 or something like that?

    Maybe I am misunderstanding your question. A router is supposed to give you a private IP address for your home (LAN) Nertwork.

  3. #3

    Raz0rEdge's Avatar
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    You have one public IP address assigned to your cable modem by your ISP and you have a second private IP address handed out by your router or your cable modem..unless you specifically configured the router and cable modem to use the same range, they will differ..

    But seeing address like 192.168.xxx.xxx, 172.10.xxx.xxx are all private Class C IP addresses..

    These things don't matter since when you're on the Internet, you only use the public IP address..the private IP addresses are not accessible from the Internet..
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    Be sure to read the Community Guidelines | The more information you provide, the better answers you get, remember GIGO.

  4. #4

    osxx's Avatar
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    Each computer in your network will have the same WAN IP but have different LAN IP for
    wired and wireless.

  5. #5


    Member Since
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    When I first checked my ip address from the link above when I was connected to my router. It was (69.xxx.xx.xxx). Then when I plugged my computer to the cable modem the ip address was (173.x.xxx.xx). Then I connected back to the netgear router and I checked the IP address again and it was the same as before (69.xxx.xx.xxx). I tried turning off the modem and router on and off and nothing changed.

    None of the ip checking websites I've visited detected a 192. or a 172. ip address. I just need to change the 69.xxx.xx.xxx ip address. Is there any way I can do that?

  6. #6

    dtravis7's Avatar
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    That 69.x.x.x is being handEd out by your ISP. There is no way to change that from your end.

    Why are you trying to a change your ip address? Trying to spoof a site with a different IP address?

  7. #7


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    I am not trying to "spoof" and website. I am simply trying change my ip address for personal reasons.

    Either way, I still don't understand why I have 2 different ip addresses (when I'm connected directly to the cable modem and when I'm connected to the router.)

  8. #8

    osxx's Avatar
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    Quote Originally Posted by kevinoh33 View Post
    I am not trying to "spoof" and website. I am simply trying change my ip address for personal reasons.

    Either way, I still don't understand why I have 2 different ip addresses (when I'm connected directly to the cable modem and when I'm connected to the router.)
    All routers that I have ever used or hooked up have always handed out a different ip for wireless versus wired on the same computer and it maybe do to the fact wired is 802.3 and wireless is 802.11 someone with more knowledge may have a better answer.

  9. #9

    baggss's Avatar
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    Quote Originally Posted by osxx View Post
    All routers that I have ever used or hooked up have always handed out a different ip for wireless versus wired on the same computer and it maybe do to the fact wired is 802.3 and wireless is 802.11 someone with more knowledge may have a better answer.
    Agreed. Go to any hotel that has wired and wireless and swap between the two, you'll see different IP ranges.

    For the OP: The wireless router is assigning a PRIVATE address to your computer as it is supposed to do. Your router uses the actual PUBLIC IP from your ISP and shares access among various devices you may allow on the network, hence the different IP adress. When you hook up to the modem directly your computer now uses the PUBLIC IP provide by your ISP and no other devices can share the network, unless your ISP allows you to have multiple PUBLIC IPs. You can have some sort of sharing enabled from the computer itself, in which case the computer will act as a router and assign PRIVATE IPs to other devices.

    There are dedicated PRIVATE Network IP ranges that are standard for all routers / private shared networks. They are:

    10.0.0.0 – 10.255.255.255

    172.16.0.0 – 172.31.255.255

    192.168.0.0 – 192.168.255.255

    http://en.wikipedia.org/wiki/Private_network

    Your router should allow the option to choose between any of those 3 blocks and may allow you to dedicate specific IPs within those block to specific devices on your network. In my case, on my home network, I have chosen to use the 10.x block and have set my router to allocate IPs from 10.0.0.2 to 10.0.0.200 for all my devices that connect to my router (both wirelessly and wired) but my actual ISP allocated PUBLIC IP is used by my router to access the internet.

    You can only choose between those 3 block of PRIVATE IPs for devices that connect to your router, there are no further options. If you wish to change your PUBLIC IP address you need to contact your ISP and see what they can do.


  10. #10


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    Quote Originally Posted by baggss View Post
    Agreed. Go to any hotel that has wired and wireless and swap between the two, you'll see different IP ranges.

    For the OP: The wireless router is assigning a PRIVATE address to your computer as it is supposed to do. Your router uses the actual PUBLIC IP from your ISP and shares access among various devices you may allow on the network, hence the different IP adress. When you hook up to the modem directly your computer now uses the PUBLIC IP provide by your ISP and no other devices can share the network, unless your ISP allows you to have multiple PUBLIC IPs. You can have some sort of sharing enabled from the computer itself, in which case the computer will act as a router and assign PRIVATE IPs to other devices.

    There are dedicated PRIVATE Network IP ranges that are standard for all routers / private shared networks. They are:

    10.0.0.0 10.255.255.255

    172.16.0.0 172.31.255.255

    192.168.0.0 192.168.255.255

    Private network - Wikipedia, the free encyclopedia

    Your router should allow the option to choose between any of those 3 blocks and may allow you to dedicate specific IPs within those block to specific devices on your network. In my case, on my home network, I have chosen to use the 10.x block and have set my router to allocate IPs from 10.0.0.2 to 10.0.0.200 for all my devices that connect to my router (both wirelessly and wired) but my actual ISP allocated PUBLIC IP is used by my router to access the internet.

    You can only choose between those 3 block of PRIVATE IPs for devices that connect to your router, there are no further options. If you wish to change your PUBLIC IP address you need to contact your ISP and see what they can do.
    Are you sure my wireless router is assigning a private ip to my macbook? Because when I check my ip address on What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... , it gives me an ip address that starts with a 69. not a 10. 172. or 192.

  11. #11

    osxx's Avatar
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    Quote Originally Posted by kevinoh33 View Post
    Are you sure my wireless router is assigning a private ip to my macbook? Because when I check my ip address on What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... , it gives me an ip address that starts with a 69. not a 10. 172. or 192.
    Ok to clear it up your actual IP that the outside world connects to you could start with 69. xxx.xxx.xx.
    The router/modem could have an IP of 192.xxx.x.xxx
    The computer could have 192.xxx.x.xx
    The point is every piece in your system that communicates with the net or
    your local net has an address that you can change within certain parameters with a static ip.
    The actual ip that the provider gave you 69.xxx.xxx.xx can only be altered by them.

  12. #12

    baggss's Avatar
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    Quote Originally Posted by kevinoh33 View Post
    Are you sure my wireless router is assigning a private ip to my macbook? Because when I check my ip address on What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... , it gives me an ip address that starts with a 69. not a 10. 172. or 192.
    Yes, I am. Did you not understand the PUBIC vs PRIVATE IP concept? The outside world will see that IP for ANY device that connects to your network because its the PUBLIC IP, the PRIVATE IPs are for internal network use only and NEVER get sent over the web. EVER


  13. #13

    BrianLachoreVPI's Avatar
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    Quote Originally Posted by osxx View Post
    All routers that I have ever used or hooked up have always handed out a different ip for wireless versus wired on the same computer and it maybe do to the fact wired is 802.3 and wireless is 802.11 someone with more knowledge may have a better answer.
    The Ethernet chipset and 802.11 chipsets each have their own unique MAC addresses.

  14. #14

    EvenStranger's Avatar
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    Last paragraph has the questions if you want to skip ahead.

    There are number of concepts here that need to be addressed. First, IP addresses are kind of like phone numbers - moving from broader information to more specific information. Your phone number would start with a country code, in the US that's 1+, then area code, denoting a large region within a state usually, then local code specifying your neighborhood or community, and then exchange, or your phone. Same with IPs. IP addresses are divided into four sets of numbers, or octets (based on 8 binary digits from 00000000 to 11111111, or 0 to 255). Your first octet is the broadest scope. It can literally cover millions of websites and individual internet accounts. Then it proceeds to narrow down through the second and third octets to finally end at the fourth octet, your network's IP. If every possible numeric combination was assigned to a computer, our current IP setup could handle about 4.2 billion (255^4) connections. However, large blocks are set aside for government use, education, different countries, or just overhead.

    Several large blocks are set aside also for private use. IPs beginning with 10.x.x.x, 172.16.x.x and 192.168.x.x are used by routers to map an internal network without requiring multiple public IP addresses. Think of a switchboard at any company - they have one public phone number, but once the call reaches the switchboard, it can be passed to an extension within the company. Your router is doing the same thing.

    Now, as to why you are receiving two different public IP addresses on two different connections to supposedly the same network, I don't know... If it's the same network, both devices should be showing the same public IP addresses, just like two phones in the same company would be accessible through the same main number. I'm wondering if you are certain you're connecting to the correct wireless network. Netgears are pretty prolific, and if you're using the generic Netgear name as your wireless network, it's easy to get it mixed up with someone else's network. Is there a VPN connection going on somewhere? Proxy software that routes your computer through a remote host? Do other computers behave the same way - a 69.0.0.0 wired and a 173.0.0.0 over wireless? If not, then you know it's a setting on your computer somewhere.

    I hope this helps... let us know what you find out.

  15. #15


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    Quote Originally Posted by EvenStranger View Post
    Last paragraph has the questions if you want to skip ahead.

    There are number of concepts here that need to be addressed. First, IP addresses are kind of like phone numbers - moving from broader information to more specific information. Your phone number would start with a country code, in the US that's 1+, then area code, denoting a large region within a state usually, then local code specifying your neighborhood or community, and then exchange, or your phone. Same with IPs. IP addresses are divided into four sets of numbers, or octets (based on 8 binary digits from 00000000 to 11111111, or 0 to 255). Your first octet is the broadest scope. It can literally cover millions of websites and individual internet accounts. Then it proceeds to narrow down through the second and third octets to finally end at the fourth octet, your network's IP. If every possible numeric combination was assigned to a computer, our current IP setup could handle about 4.2 billion (255^4) connections. However, large blocks are set aside for government use, education, different countries, or just overhead.

    Several large blocks are set aside also for private use. IPs beginning with 10.x.x.x, 172.16.x.x and 192.168.x.x are used by routers to map an internal network without requiring multiple public IP addresses. Think of a switchboard at any company - they have one public phone number, but once the call reaches the switchboard, it can be passed to an extension within the company. Your router is doing the same thing.

    Now, as to why you are receiving two different public IP addresses on two different connections to supposedly the same network, I don't know... If it's the same network, both devices should be showing the same public IP addresses, just like two phones in the same company would be accessible through the same main number. I'm wondering if you are certain you're connecting to the correct wireless network. Netgears are pretty prolific, and if you're using the generic Netgear name as your wireless network, it's easy to get it mixed up with someone else's network. Is there a VPN connection going on somewhere? Proxy software that routes your computer through a remote host? Do other computers behave the same way - a 69.0.0.0 wired and a 173.0.0.0 over wireless? If not, then you know it's a setting on your computer somewhere.

    I hope this helps... let us know what you find out.
    I renamed the default name "NETGEAR" to my first name so I wouldn't get confused with others. There's not VPN connection or proxy softwares. I also have a desktop computer that uses a Belkin wireless adaptor to recieve wifi from my router and it also as the same IP Address (69.xxx.xx.xxx) as my Macbook Pro. So maybe I'm thinking, if I change the router, will it give me a new IP Address?

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