ISP IP Address lease times

elvch01

Does anybody have a list of ISPs and their public IP address lease times?
I have TalkTalk ADSL and assume that their lease time must be very short because every time I reboot my ADSL router I get a different public IP address. I also have Virgin Cable and have always had the same public IP address, even if I leave my cable modem off for a day or two (not that I'm likely to do that too often, I get 50Mb from Virgin and <3Mb from TalkTalk).

I woldn't mind moving away from TalkTalk, but I do like having a different IP address every time I boot my router

pcombo

The reason for this your on a dynamic ip address which will change.

Lease time are used for LANS DHCP not so much ISP they wont just renew the ip unless you reboot your router as stated.

DCFC79

Exscuse me for asking but why would you want to know about ISPs and their public IP address lease times?

davb

They are both dynamic, but Virgin is termed more as sticky - which will only change after something big like a MAC address change - so it is almost a static IP.

elvch01

pcombo wrote: »

The reason for this your on a dynamic ip address which will change.

Lease time are used for LANS DHCP not so much ISP they wont just renew the ip unless you reboot your router as stated.

Yes, I know I am on a dynamic IP address - on both my ISP connections - and you are incorrect when you say lease times are only for LAN IP addresses - ISPs use them too - just usually with different lease lengths

elvch01

DCFC79 wrote: »

Exscuse me for asking but why would you want to know about ISPs and their public IP address lease times?

Because I like having a different IP address each time I reboot my ADSL router - as currently happens with TalkTalk

elvch01

davb wrote: »

They are both dynamic, but Virgin is termed more as sticky - which will only change after something big like a MAC address change - so it is almost a static IP.

Indeed - I agree, but would like information about how sticky addresses are from various ISPs

fwor

I suspect that this is something that the ISPs deliberately avoid making known publicly, because to do so might reduce the flexibility to change their operational procedures in future, and also because it's an unnecessary detail that most users won't understand or need to know.

I'm not sure what benefit you get from your IP address changing either. It won't stop subsequent tracking of your activities, as the ISP will log what IP addresses you had and when, even if they do change regularly.

DCFC79

elvch01 wrote: »

Because I like having a different IP address each time I reboot my ADSL router - as currently happens with TalkTalk

right ok, but why though, im just curious,

elvch01

I develop web applications at home in my spare time and having a Virgin connection with a "static" IP address gives me a nice fixed IP address that I can use as my web app server address. For testing, having a separate ISP connection is good and having one where the IP address changes simplifies looking through the test script & web server log files to demarcate where I am running different tests. I simply just reboot my ADSL router and it becomes clear in the logs etc where the client IP address changes

kwikbreaks

davb wrote: »

They are both dynamic, but Virgin is termed more as sticky - which will only change after something big like a MAC address change - so it is almost a static IP.

O2 users with dynamic IPs (ie most) see this behaviour too although there is no guarantee and you can sometimes get a different one without swapping your router.