Journal Citation Reports – a list of scientific journals, published annually by Clarivate Analytics. It includes a number of factors indicating the significance of a given journal, e.g. the Impact Factor.
We send updated lists of JCR journals with IF values every year in our SASO newsletter.
Apart from that, once you set up an account in the Clarivate Analytics database, each of you can check if a given journal is featured in the JCR database and if it has an Impact Factor using this website.