How do I find out my ISP's IP address?

No I am not doing anything crafty I wouldn't know how to anyways. Yes it is for school, I am reviewing questions for my final but I can't figure this one out. Are they talking about their website cause thats easy. Or do I have to find out like what their mega computers ip address is spamming me my sweet bandwidth? If so how?

p.s. hu ray i get to write in bad grammer for a change who learned you how to spoke?

I will clarify one review question is what is your ISP's ip address? How did you attain it?

Yeah I know I can find websites and my ip very easy. They must mean my ISP website based on your response.

The problem with the question is from what perspective do we evaluate what is meant by 'the ISP?'

• my gateway to the ISP? (which is my view of the ISP)
• the DNS addresses by the ISP?
• or the ISP's connection to the Internet (ie their input)?

Leeky makes a good point: "The IP has registered these blocks of IP addresses".

Without much effort, you can use TRACERT GOOGLE.COM to find a path from you
(when at home or at school) to the google website. This will have some information that will allow you find some answers
First, verify you known a valid address for google.com using nslookup google.com

Code:

nslookup google.com.
Server:  nscl-01.tierzero.net    << the DNS used to find google.com
Address:  216.116.96.2

Non-authoritative answer:
Name:    [B]google.com[/B]
Addresses:  74.125.224.208, 74.125.224.209, 
74.125.224.210, [B]74.125.224.211[/B],  74.125.224.212

now - - here's mine example of tracert:

Code:

Tracing route to google.com[B] [74.125.224.211][/B]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  localrouter [192.168.0.1]
  2    20 ms    39 ms    13 ms  cpe-50-113-112-1.san.res.rr.com [[COLOR="Blue"]50.113.112.1[/COLOR]]
  3     9 ms     9 ms     9 ms  76.167.22.185
  4    18 ms    21 ms    23 ms  tge2-2-0.vnnyca2-rtr1.socal.rr.com [72.129.13.96]
  5    22 ms    23 ms    23 ms  72.129.13.0
  6    11 ms    13 ms    12 ms  ae-5-0.cr0.lax00.tbone.rr.com [66.109.6.102]
  7    14 ms    12 ms    12 ms  ae-0-0.pr0.lax10.tbone.rr.com [66.109.6.133]
  8    14 ms    40 ms    13 ms  72.14.198.73
  9    13 ms    12 ms    13 ms  216.239.46.40
 10    14 ms    11 ms    12 ms  72.14.236.13
 11    12 ms    13 ms    14 ms  lax02s02-in-f19.1e100.net [B][74.125.224.211][/B]

Trace complete.

• Line 1 is always your router
• Line 2 is your gateway address as announced by DHCP (also seen in ipconfig /all)
• the last line should be google.com as seen above by nslookup

my gateway address is line 2 = = 50.113.112.1

Using that IP address, we can discover the block of addresses as described by Leeky using a tool like Win32WhoiS which reports a ton of stuff including

Code:

NetRange:       [COLOR="Blue"]50.113.0.0 - 50.113.255.255[/COLOR]
CIDR:        [COLOR="Blue"]   50.113.0.0/16[/COLOR]
OriginAS:       AS11955, AS20001, AS21522
NetName:        RRWE
NetHandle:      NET-50-113-0-0-1
[U]OrgName:        Road Runner HoldCo LLC[/U]
OrgId:          RRWE
Address:        13820 Sunrise Valley Drive
City:           Herndon
StateProv:      VA
PostalCode:     20171

Road Runner owns the block 50.113.0.0 - 50.113.255.255

Now here's a suprise when we ask what is line 3? 76.167.22.185

Code:

[COLOR="Blue"]NetRange:       76.166.0.0 - 76.167.255.255
CIDR:           76.166.0.0/15[/COLOR]
OriginAS:       
NetName:        RRACI
NetHandle:      NET-76-166-0-0-1
[U]OrgName:        Road Runner HoldCo LLC[/U]
OrgId:          RRWE
Address:        13820 Sunrise Valley Drive
City:           Herndon
StateProv:      VA
PostalCode:     20171

Road Runner also owns 76.166.0.0 - 76.167.255.255
In fact, continuing down the list, lines 2-5 are all Road Runner
which demonstrates the admin's choice to control bandwidth and routing while
within Road Runner and line 8 is Google.

Code:

NetRange:       72.14.192.0 - 72.14.255.255
CIDR:           72.14.192.0/18
OriginAS:       
NetName:        GOOGLE
NetHandle:      NET-72-14-192-0-1
[U]OrgName:        Google Inc.[/U]
OrgId:          GOGL
Address:        1600 Amphitheatre Parkway
City:           Mountain View
StateProv:      CA
PostalCode:     94043

Thanks for the responses, I'm going to email my instructor and see whats what. I thought it would be something simple that I overlooked which it probably is but the wording like you all said is so wishy washy.

Update they just meant my ISP website, I got 175\175 on my final woot, that was one of about 50 questions. Now I have to do my hard class Local Area Network Planning and Design.

Software Installation - MS Windows was so much easier

go to whatismyipaddress.com

oops; when accessing this from your own computer, it shows you YOUR ip address, not that of any other ISP (which is the question being discussed).