IP Address


macrumors 6502a
Original poster
Jun 14, 2007
Down by the bay.
Is it me, or do the IP addresses on my MacBook change once in a while? That very last number have gone from 2, all the way up to 6.

Is that normal?


macrumors 6502
Oct 13, 2005
Austin, Texas
If you are not using a static ip address, then yes it will change. It will change every time you connect to the network depending on how many other computers are currently connected.

I am assuming that you are talking about the IP address that your computer is assigned by your router...


Staff member
Jan 20, 2005
It depends on what kind of connection you have from your provider. Most regular users have dynamic IPs from their ISPs, so they do change once in awhile. So yes, it's completely normal.


macrumors 603
Apr 29, 2005
San Francisco
Its normal for your IP address to change, you can make it static if you like. Although you wouldn't gain much by doing that.
Agreed. Absolutely normal. Having a static IP comes in handy when you start accessing your computer from other locations (FTP, SSH, VNC, etc.). But sounds like that that isn't the case.


macrumors 603
Apr 29, 2005
San Francisco
Refresh what? The IP address? Or do you mean change it manually? Refreshing would be to push the Renew DHCP License button. To change it manually select DHCP Manually in the drop down menu.


macrumors 68030
Oct 31, 2006
More so, if you use a router, then you can have it assign a certain IP address always. I think this is what they were referring to.


macrumors G5
To be clear, when you are setting the IP address of a Mac to "Manual", the address is static only in relationship to the router, which is issuing an internal, protected IP address range within your household network. The Cable or DSL modem is issuing an 'real' IP address, usually dynamic, to the router, so the outsideworld IP address is still subject to change as often as the ISP wants.

If you have your Mac connected directly to a Cable/DSL modem, and you change the IP to Manual in hopes of entering your own static IP, then your Internet connection will stop working, if not immediately, then as soon as the ISP issues a new IP to the modem.