Answer: Like many popular Web sites, YouTube utilizes multiple Internet servers to handle incoming requests. These are the most common YouTube IP addresses:
Just as you can visit the YouTube home page by entering http://www.youtube.com/ into your browser, you can also enter http://followed by any of the above addresses – for example
If you cannot reach YouTube using http://www.youtube.com/, your Web host may be blocking access to it. In these cases, using an IP address based URL may succeed yet violate your host network’s acceptable use policy (AUP).
Check your AUP or contact your local network administrator before using an IP address to connect to YouTube.
Answer: First, you can use the pingutility to look up Web site IP addresses. Ping attempts to contact the Web site by name and will report back the IP address it finds. For example, to find the IP address of about.com, entering the command
- ping about.com
will return a result similar to the following that contains the IP address:
- Pinging about.com [
- ] with 32 bytes of data: . . .
Note that many larger Web sites do not return replies to ping commands, but the site IP address can usually still be obtained. The ping method will fail if the Web site is temporarily “down” of if the computer used to perform the ping is not connected to the Internet.
The Internet WHOIS System
An alternative method to find Web site IP addresses relies on the Internet WHOIS system. WHOIS is a database that tracks registration information for Web sites including the owner and IP address.
To look up Web site IP addresses with WHOIS, simply visit one of the many public sites (like whois.net or networksolutions.com) that offer WHOIS database query services. Searching for a particular site name like about.com, for example, produces a result similar to the following:
- Current Registrar: REGISTER.COM, INC.
- IP Address:
- (ARIN & RIPE IP search) . . .
In the WHOIS method, note that the IP addresses are stored statically in a database and thus do not require the Web site actually be online or reachable over the Internet.