{"id":23941,"date":"2011-08-31T07:30:09","date_gmt":"2011-08-31T12:30:09","guid":{"rendered":"https:\/\/www.pcmatic.com\/blog\/?p=23941"},"modified":"2011-08-31T07:30:09","modified_gmt":"2011-08-31T12:30:09","slug":"ask-leo-how-do-i-figure-out-who-owns-an-ip-address","status":"publish","type":"post","link":"https:\/\/www.pcmatic.com\/blog\/ask-leo-how-do-i-figure-out-who-owns-an-ip-address\/","title":{"rendered":"Ask Leo: How do I figure out who owns an IP address?"},"content":{"rendered":"

\"askleo\"<\/p>\n

By Leo Notenboom<\/p>\n

It’s critically important that you realize that you will not, on your own,
\nbe able to get the name, location, phone number, email address or any other
\nspecific information with just an IP address. Not only can an IP address change
\nor be shared among many computers (and hence people), but the information that
\nyou’re seeking is considered private and is protected by the ISP who owns that
\nIP address.<\/p>\n

To get that information, you’ll need a legal reason to require it and that
\ntypically means a court order of some sort.<\/p>\n

Let’s look at what you can determine from an IP address on your own and a
\nfew tools that will help you determine at least the ISP that owns it.<\/p>\n

I’m going to use several different tools in this example because each
\nprovides valuable information, even though they might overlap quite a bit as
\nwell.<\/p>\n

Whois<\/h3>\n

“Whois” is a service that basically answers the question “who is X” where X
\nis an IP address, a domain name, and several other things.<\/p>\n

ARIN, the American Registry for Internet Numbers, is a fine place to start.
\nThe ARIN Whois can be accessed from http:\/\/whois.arin.net<\/a> in the upper right
\ncorner:<\/p>\n

\"ARIN<\/p>\n

Enter the IP address you’re interested in and press Return. I’ll use
\n64.105.215.206 (an IP address that I know to be assigned, but at this writing, is unused)
\nas my example:<\/p>\n

\n\"whois<\/p>\n

This is pretty typical of what you’ll get: information that identifies the
\nISP who owns the “block” of IP addresses that contains the IP address that you asked
\nabout. In this case, the block includes all IP addresses from 64.105.0.0 through
\n64.105.255.255.<\/p>\n

With a court order, law enforcement would then approach the ISP for more
\ndetailed information about who that IP address is assigned to.<\/p>\n

Also note that it’s possible that the information presented may point you to
\na different whois server – ARIN covers IP addresses assigned in North America;
\nthere are other services for the rest of the planet.<\/p>\n

Reverse DNS<\/h3>\n

In some cases, reverse DNS can be instructive.<\/p>\n

DNS is the mapping of a domain name, like “ask-leo.com”, to an IP address.
\nReverse DNS does, as its name implies, the reverse – given an IP address finds
\nthe domain name that has been assigned as the primary identifier.<\/p>\n

I’ll use a tool from a third-party vendor this time, http:\/\/whois.domaintools.com<\/a>:<\/p>\n

\n\"Whois<\/p>\n

You can see that this gives much of the same information that we’ve seen above,
\nnamely the ISP who owns that IP address. But there’s an additional tidbit of
\ninformation.<\/p>\n

Article Continued Here<\/a><\/h3>\n

This post is excerpted with Leo’s permission from his blog.<\/p>\n

FaceBook URL: Leo’s Facebook<\/a><\/p>\n

Twitter URL: http:\/\/twitter.com\/askleo<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\"askleo\"<\/p>\n

While you cannot find the specific owner of an IP address, I’ll look at a few tools to see what IP-related information you can get.<\/p>\n","protected":false},"author":19,"featured_media":66012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[49],"tags":[46,692,4875],"class_list":["post-23941","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-leo-notenboom","tag-ask-leo","tag-ip-address","tag-leo-notenboom"],"yoast_head":"\nAsk Leo: How do I figure out who owns an IP address?<\/title>\n<meta name=\"description\" content=\"While you cannot find the specific owner of an IP address, I'll look at a few tools to see what IP-related information you can get.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pcmatic.com\/blog\/ask-leo-how-do-i-figure-out-who-owns-an-ip-address\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta 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