ADB shell netstat showing "radio" user listening on quite a few ports - is this ok?

The question says it all. I am learning my way around all the network connections my phone wants to establish. System is official /e/os on a Fairphone 5. Running adb shell netstat -eltup I get Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program Name tcp 0 16 0.0.0.0:50057 0.0.0.0:* UNKNOWN radio 29453 1393/netmgrd tcp 0 16 0.0.0.0:50026 0.0.0.0:* UNKNOWN radio 30870 1393/netmgrd tcp 0 16 0.0.0.0:50058 0.0.0.0:* UNKNOWN radio 29468 1393/netmgrd tcp 0 16 0.0.0.0:50027 0.0.0.0:* UNKNOWN radio 30871 1393/netmgrd tcp 0 16 0.0.0.0:50059 0.0.0.0:* UNKNOWN radio 29469 1393/netmgrd tcp 0 16 0.0.0.0:50028 0.0.0.0:* UNKNOWN radio 30832 1393/netmgrd [...] udp 0 0 0.0.0.0:50043 0.0.0.0:* ESTABLISHED radio 29431 1393/netmgrd udp 0 0 0.0.0.0:50050 0.0.0.0:* ESTABLISHED radio 30838 1393/netmgrd udp 0 0 0.0.0.0:50051 0.0.0.0:* ESTABLISHED radio 30839 1393/netmgrd udp 0 0 0.0.0.0:50054 0.0.0.0:* ESTABLISHED radio 29454 1393/netmgrd udp 0 0 0.0.0.0:50055 0.0.0.0:* ESTABLISHED radio 29455 1393/netmgrd udp 0 0 0.0.0.0:50058 0.0.0.0:* ESTABLISHED radio 30880 1393/netmgrd udp 0 0 0.0.0.0:50059 0.0.0.0:* ESTABLISHED radio 30881 1393/netmgr` I just included a selection, the complete list is longer. Is this expected behavior?