No — Beltram isn’t listed as a free font. The link at the top of this page goes to the source, where you can check licence options.
Beltram draws from the late 19th century German jobbing typefaces, namely the lighter weight of Akzidenz Grotesk in different sizes, as opposed to the infamous Halbfett.
A1 features 1 website using Beltram. It leans towards Clean, Minimal, and Photography design styles, and it’s most often built with Webflow.