Hellfire
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| posted on 5/1/11 at 07:12 PM |
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IP Address question
If I have an IP address, for example 11.222.333.44 does anyone know which set of numbers identifies the ISP?
Phil
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britishtrident
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| posted on 5/1/11 at 07:21 PM |
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They are issued in batches ---- the numbers themselves don't have significance.
To find out the ISP holding a particular number do a "Who is" IP look up search this will give details of the registrant.
http://ip-lookup.net/index.php
[Edited on 5/1/11 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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mookaloid
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| posted on 5/1/11 at 07:28 PM |
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being really picky - yes I know 
You can't have an IP address with 333 as one of the numbers as the biggest number you can have is 255 
"That thing you're thinking - it wont be that."
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Hellfire
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| posted on 5/1/11 at 07:45 PM |
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quote:
Originally posted by britishtrident
They are issued in batches ---- the numbers themselves don't have significance.
To find out the ISP holding a particular number do a "Who is" IP look up search this will give details of the registrant.
http://ip-lookup.net/index.php
[Edited on 5/1/11 by britishtrident]
Thats really useful, thankyou.
My next question is;
Can I find a history/log of IP numbers that have been assigned to my router over the last thirty days or so?
Phil
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Ninehigh
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| posted on 5/1/11 at 07:53 PM |
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Iirc those would be 255.0.0.1/2/3 and so on.
I may be thinking of something else though...
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mookaloid
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| posted on 5/1/11 at 07:58 PM |
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It's unlikely that you will get this information from your router but have a poke about in the web interface to see if there is a log of the
connections,
however your ISP might hold it. Whether they will release the information to you is another matter......
"That thing you're thinking - it wont be that."
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britishtrident
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| posted on 5/1/11 at 09:04 PM |
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Unless your router has been off for long periods it is likely it will have retained its lease on the ip address it is currently using.
Also increasingly ISP are assigning static IP to broadband lines even if they don't tell the users as with everybody using routers whats the
point of trying to save pennies on blocks of IP addresses.
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Hellfire
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| posted on 5/1/11 at 09:13 PM |
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My router is turned off every night and remains off for about 19 hours. I don't generally keep a log of the IP addresses that my router is
assigned but I know it has changed since the last time I looked about a week ago.
Looks like I'll have to contact my ISP if I want the history/log......
Phil
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hobbsy
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| posted on 5/1/11 at 09:53 PM |
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quote:
Originally posted by mookaloid
being really picky - yes I know
You can't have an IP address with 333 as one of the numbers as the biggest number you can have is 255
It's 254 surely
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fossett
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| posted on 5/1/11 at 10:20 PM |
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quote:
Originally posted by hobbsy
quote:
Originally posted by mookaloid
being really picky - yes I know
You can't have an IP address with 333 as one of the numbers as the biggest number you can have is 255
It's 254 surely
Nope deffo 255 - 8 bits = 256 different states - 0-255
[Edited on 5/1/11 by fossett]
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hobbsy
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| posted on 5/1/11 at 10:25 PM |
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We are talking about IP addresses for devices though - 255 is a broadcast address never assigned to devices.
Why am I getting sucked into a discussion about IP addresses on a car forum! 
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Daddylonglegs
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| posted on 5/1/11 at 10:48 PM |
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You know it had to happen  , if it wasn't you it would have been me or someone else. So thank you for saving me lol!
It looks like the Midget is winning at the moment......
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scudderfish
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| posted on 6/1/11 at 07:07 AM |
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Salute hobbsy for diving on the grenade of IP addressing geekery
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mookaloid
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| posted on 6/1/11 at 08:33 AM |
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quote:
Originally posted by hobbsy
We are talking about IP addresses for devices though - 255 is a broadcast address never assigned to devices.
Why am I getting sucked into a discussion about IP addresses on a car forum!
It seems I'm not the only really picky person here
"That thing you're thinking - it wont be that."
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ironside
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| posted on 6/1/11 at 04:43 PM |
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quote:
Originally posted by mookaloid
quote:
Originally posted by hobbsy
We are talking about IP addresses for devices though - 255 is a broadcast address never assigned to devices.
Why am I getting sucked into a discussion about IP addresses on a car forum!
It seems I'm not the only really picky person here
I can be pickier - 255 is perfectly valid. 10.44.3.255 is perfectly valid if your subnet mask is 255.255.0.0 for example. Only the first and last
addresses in a subnet are never assigned to devices not the first and last numbers in the range 0 to 255.
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mookaloid
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| posted on 6/1/11 at 04:54 PM |
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quote:
Originally posted by ironside
quote:
Originally posted by mookaloid
quote:
Originally posted by hobbsy
We are talking about IP addresses for devices though - 255 is a broadcast address never assigned to devices.
Why am I getting sucked into a discussion about IP addresses on a car forum!
It seems I'm not the only really picky person here
I can be pickier - 255 is perfectly valid. 10.44.3.255 is perfectly valid if your subnet mask is 255.255.0.0 for example. Only the first and last
addresses in a subnet are never assigned to devices not the first and last numbers in the range 0 to 255.
In terms of pickyness I think you win the prize - and you are of course correct
"That thing you're thinking - it wont be that."
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loggyboy
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| posted on 6/1/11 at 04:56 PM |
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quote:
Originally posted by Hellfire
My router is turned off every night and remains off for about 19 hours. I don't generally keep a log of the IP addresses that my router is
assigned but I know it has changed since the last time I looked about a week ago.
Looks like I'll have to contact my ISP if I want the history/log......
Phil
Maybe one of the admins/mods could help you, when I have been admin/mod on various forums the IP the poster was using was displayed next to the thread
title.
As you post here quite reguarly that may give a fairly comprehensive list.
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Hellfire
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| posted on 10/1/11 at 07:15 PM |
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I've had a response from my ISP stating the following;
...we use DHCP (Dynamic Host Configuration Protocol) method to assign the IP addresses to our customers which means that the IP addresses are
assigned randomly whenever a new connection is made to the internet.
Due to this fact, we are unable to provide you with the history of IP addresses assigned to you for the last 30 days
I suspect this isn't true. Surely they should know, or at least be able to find my IP history....... Are they trying to fob me off, or could it
be that they genuinely don't log the history?
Phil
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McLannahan
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| posted on 10/1/11 at 07:19 PM |
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Nah rubbishio! I bet if you'd be sharing some files illegally they'd have an excellent log of your IP and online activity.
It's loads of work and loads of logs for them to go through. If there was a legal reason to do it or money in it for them....
quote:
Originally posted by Hellfire
I've had a response from my ISP stating the following;
...we use DHCP (Dynamic Host Configuration Protocol) method to assign the IP addresses to our customers which means that the IP addresses are
assigned randomly whenever a new connection is made to the internet.
Due to this fact, we are unable to provide you with the history of IP addresses assigned to you for the last 30 days
I suspect this isn't true. Surely they should know, or at least be able to find my IP history....... Are they trying to fob me off, or could it
be that they genuinely don't log the history?
Phil
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Ninehigh
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| posted on 10/1/11 at 07:50 PM |
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Heh doubt it 3 haven't come up with our contract yet we've only given them 28 days, 8 months ago
Also imagine how many times a router could change address in a day, and how many thousand they have running...
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