url = 'http://www.foocorp.com/foo/bar'
URI.parse(url).host
# => www.foocorp.com

Note that this will raise an error if the given argument is not a URL.

Rails professionals since 2007

Our laser focus on a single technology has made us a leader in this space. Need help?

• We build a solid first version of your product
• We train your development team
• We rescue your project in trouble

Read more Show archive.org snapshot

If you need the host's full URL without path, query, fragment etc., use URI.join Show archive.org snapshot with a clever twist:

url = 'http://www.foocorp.com:33546/foo/bar?query=foobar#hash'
URI.join url, '/'
# => http://www.foocorp.com:33546/