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I see my PC has TCP connections open to Then I checked the whois record and find it is registered to Google. Weird.

A quick search seems to indicate that is pretty popular - about the same reach as or according to Alexa - but what the hell is it? I run Chrome so assume it might have something to do with that, but why is there so little information about it?

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1e100 means 1 E 100. 1 * 10 ^ 100. The number, which is named Googol, where Google gets the name from. – brandstaetter Nov 27 '09 at 9:02
1 for further reading – brandstaetter Nov 27 '09 at 9:03
@brandstaetter Yes, I got the googol reference when I saw the whois record. Neat :) – Lunatik Nov 27 '09 at 9:19
Note: Pinging Google yields this domain in replies. – Nathan Osman Jan 30 '11 at 3:14
up vote 55 down vote accepted

It's Google Safebrowsing feature in Chrome.

That feature checking sites and tell you if that site is "Attack Site"

sinni800: @MicTech, Google has all it's search servers under the 1e100 domain. I know this is kind of late but w/e. It does not ONLY relate to google safe browsing.

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... and tells Google what you're browsing. – Moayad Mardini Nov 29 '09 at 14:12
Google Safe Browsing Policy: "When you visit a site that we think could be a phishing or malware site, your browser will send Google a hashed, partial copy of the site’s URL so that we can send more information to your browser. Google cannot determine the real URL from this information." – Alan B Feb 8 '10 at 10:14
@MicTech, Google has all it's search servers under the 1e100 domain. I know this is kind of late but w/e. It does not ONLY relate to google safe browsing. – sinni800 Aug 19 '11 at 9:06
@AlanB That policy makes sense only when you don't think about it. If it couldn't "determine the real URL from this information", then how the heck could it tell if it's a phishing/malware site? Besides, "partial copy of the site's URL" could mean anything, and I bet it at least contains the full domain name. Bottom line: Google can know all the sites you visit unless they really don't wanted to (which frankly doesn't seem the case). – Camilo Martin Jan 31 '12 at 9:08
Why do the connections stay open (in System Process) long after I closed Chrome? – Michel de Ruiter Jul 25 '12 at 21:46

Here is the truth. Google tracks you, me and everybody!

Lots of Google services use but that doesn't mean 1e100 is just for the services you want to have. For example Google safebrowsing feature(or I should say snitch) is being used no matter what you choose. Even if you disable any option on chrome to prevent safebrowsing, you will still have lots of connections to

I have been trying to block all connections to but no luck! If you are using Google Chrome or any other Chrome based browser (Comodo Dragon, Yandex Browser and so on), your browser WILL send the URL you are visiting to Google. Even if you tell Chrome not to do that!

You can confirm that with these steps:

  1. Download and install Comodo Dragon(to test any Chrome based browser do that, of course Google Chrome also does that).
  2. Uncheck all checkboxes under the Privacy section in the Setting tab.
  3. Change default search engine for omnibox(you can use duckduckgo or something else).
  4. Type an URL into address bar and chrome immediately inform about the URL you are about to visit!

Here is the screenshot from Comodo Killswitch after I did those steps: enter image description here

Not only that, GoogleUpdate.exe will run and send some more information EVEN IF chrome is closed and GoogleUpdate service is DISABLED!

I used Comodo Firewall the block and guess what, Chrome still find a way to open connection and send data to! It even pass through firewall. I don't know how but it does!

Google started with the motto "Don't be evil" but I say, "Don't be evil, says the devil".

I recommend to use Firefox as browser (of course you will still need to disable safebrowing in Firefox) and stop using Google products. I know it is a painful experience to do it but it had to be done!

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Lol @ "Here is the truth." If a person doesn't know that Google [very efficiently] tracks them, then they live under a rock. It's how their advertising engine knows how to target you. – aggregate1166877 Jul 22 '15 at 14:37
@aggregate1166877 except it didn't know how to target me, which is why I have a firewall on my cellphone in the first place. A Chinese phone operator for a Czech guy? C'mon... – Jan Dvorak Nov 11 '15 at 10:46
@JanDvorak, google can spy on you even if you use a firewall. Google uses cookies to track people, which is allowed by firewall because it's considered an HTTP traffic. – Ramazan POLAT Dec 4 '15 at 15:54
OP is asking for what the domain is used for, not your opinions (correct or incorrect) on Google services. Connections remain established for a while probably due to HTTP persistent connections. The only correct answer in this whole thread is the one that actually quotes Google help. – Benjamin Goodacre Mar 7 at 12:25

From Google Help: is a Google-owned domain name used to identify the servers in our network.

Following standard industry practice, we make sure each IP address has a corresponding hostname. In October 2009, we started using a single domain name to identify our servers across all Google products, rather than use different product domains such as,, and We did this for two reasons: first, to keep things simpler, and second, to proactively improve security by protecting against potential threats such as cross-site scripting attacks.

Most typical Internet users will never see, but we picked a Googley name for it just in case (1e100 is scientific notation for 1 googol).

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Correct. You could also add that the connections stay open probably due to HTTP persistent connections. – Benjamin Goodacre Mar 7 at 12:28

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