The domain name amzn.to is owned by Amazon. This domain name is often used to make Amazon URLs shorter. This gets used when you share a item for example, or you may see it on websites linking to Amazon products.
The domain name was first registered back in 2010.
AMZN is also the stock market short name (symbol) for Amazon.
The domain root of amzn.to redirects to amazon.com (as per image below)
UK based technology professional, with an interest in computer security and telecoms.