Choose somebody or a group of people to give you feedback. If possible, try to get people from differt levels of the hierarchy.
Ask them for feedback. For example by giving them the same (empty) skills and competencies list. If you are working for a larger organisation and feel the need for more anonymous feedback, you can hire a consultant to organise a 360 Degree Performance Appraisal. Most often, 360-degree feedback will include direct feedback from an employee's subordinates, peers (colleagues), and supervisor(s), as well as a self-evaluation. It can also include, in some cases, feedback from external sources, such as customers and suppliers or other interested stakeholders.
Thank the people who gave input, ask them to elaborate if there are any questions and inform them how their feedback will be used.
Go through our online course Communication Skills, especially the part about effective communication, to learn more about active listening and receiving feedback. You have to log in, but the course is for free.