The phrase "a website with an" is correct and usable in written English.
It can be used when describing a website that has a specific feature or characteristic that follows the article "an."
Example: "I found a website with an interactive map that shows all the hiking trails in the area."
Alternatives: "a site featuring an" or "a webpage containing an".
She had a website with an e-mail address.
In 2009 the ASA switched to compiling a website with an index of all groups like the CD publication.
To test the Solar Schools idea we launched a pilot scheme, and set up a website with an accompanying resource pack to help the participating schools to raise money.
"In the same way that you wouldn't browse the Web with an unpatched copy of Internet Explorer, you shouldn't run a website with an unpatched or old version of WordPress, cPanel, Joomla, or Drupal," said Cutts.
Academics at the London School of Hygiene and Tropical Medicine are attempting to post a copy of every document on a website with an index, a move that would give the anti-tobacco lobby a powerful weapon in future court cases.
And everyone's got a website with an "About" button.
1211 BBC Monitoring says it has found a website with a brief statement, in which an al-Quaida-related organisation has claimed responsibility for today's blasts.
The next page of search results linked to a website with a description that said, "If you want Mara Wilson nude and sex pictures, click here".
Images of the Nike designed strip were posted on www.footyheadlines.com, a website with a track record of accurately unearthing new kits ahead of schedule.
A blog is traditionally just a website with a selection of recent articles on the main page and links to chronologically-sorted articles in a sidebar.
The company created a website with a catalogue, where employees could find projects to try out, and supplemented it with infrastructure to host and develop the projects.
