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Stability of IP addresses
We have been cox internet users for many years and for the past two or three at least, our public IP has been stable at 68.3.x.y, where x and y never changed.
Today I reset our cable modem and we were assigned a new IP address in the 24.251.x.y range.
We were never promised a static IP address and I'm not complaining that it changed. However, I am curious about this because it was stable for so long.
Did Cox make a change to how IP addresses are assigned (I'm in Phoenix, AZ if that matters)? Can I expect the new IP address to remain stable for a couple years or more like the old one?
I tried calling tech support to ask this question, but the rep I talked to was mystified that our old address had stayed the same for so long and said that we should get a new IP every 24 hours... I think this person may have been confusing DHCP lease durations with actual IP address assignments... a refresh of the DHCP lease every 24 hours makes sense, but it's possible, likely even, to get the same address multiple times in a row, yes?
So, TLDR:
1) How long would one guess my new IP address will stay the same?
2) Does Cox offer stable IP addresses for an additional monthly cost, possibly?
Asking because I use ssh to connect to certain hosts that restrict inbound connections by IP address, and I need to tell the admins which IP I will be coming from.
Health_Edge
Valued Contributor III
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4.2K Messages
11 years ago
1. Hard to guess. The rotation depends on the DHCP pool and the amount of queries made to the server. There are some precautions you take, like cloning the MAC address when changing routers, but the IP rotation is somewhat unpredictable. Even a engineer wouldn't know how the Cox system will change as IPv4 starts to run dry and Cox rotates its IP's around the country. Thats one of the reason Geo-tag data is not accurate.Also, its unknown how IPv6 will effect it. My guess is the recent change had something to do with thee change in infrastructure that allowed the Preferred and Premier speed upgrade.
2. No, but you can get a static IP from Cox business. Even a static IP is not guaranteed to stay the same, with node changes and such, but those are relativity, once every few years, rare.
PS. Does your work have the ability to track your IP via DDNS?
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