I do. Currently I use it mostly for personal stuff as part of my time spent on production support. Importing data from queries, exporting spreadsheets, reading complex json data and extracting needed info, etc. In the past when I was on DevOps used it with Jenkins and various automation processes, and I’ve used it as a developer to create test environments and test data.
First 3 digits are the area number assigned to a geographic. Next 2 are a group number and are not used serially but have a rather unusual usage sequence. The last 4 are a serial number assigned in order.