In confluent kafka version 7.4.3-ccs, what are the ports 37421, 39821, 40223, 43597 and 43611 are used for and should they be opened or closed by the firewall?

Why I cant seem to find these ports in Confluent literature?
Why are these ports different from all my brokers?

kafka-topics -version
7.4.3-ccs (Commit:58bc41cd9d6c788aee9a08c455ec7578fe9a71f2)

broker1.server.com – Profiles: burrow & kafka
[[email protected] ~]# lsof -i -P -n | grep LISTEN
prometheu 1579 prometheus 3u IPv6 30642 0t0 TCP *:9100 (LISTEN) Open
java 1608 kafka 109u IPv4 38682 0t0 TCP *:9131 (LISTEN) Open
*java 1608 kafka 117u IPv4 38865 0t0 TCP :37421 (LISTEN) Closed
java 1608 kafka 887u IPv4 41540 0t0 TCP 100.100.100.10:9093 (LISTEN) Open
burrow-1. 1613 burrow 8u IPv6 30671 0t0 TCP *:9105 (LISTEN) Open

broker2.server.com Profiles: kafka
[[email protected] ~]# lsof -i -P -n | grep LISTEN
prometheu 1542 prometheus 3u IPv6 35984 0t0 TCP *:9100 (LISTEN) Open
java 9228 kafka 109u IPv4 48803 0t0 TCP *:9131 (LISTEN) Open
*java 9228 kafka 117u IPv4 48812 0t0 TCP :39821 (LISTEN) Closed
java 9228 kafka 710u IPv4 50312 0t0 TCP 100.100.100.10:9093 (LISTEN) Open

broker3.server.com Profiles: burrow and kafka
[[email protected] ~]# lsof -i -P -n | grep LISTEN
prometheu 1561 prometheus 3u IPv6 40086 0t0 TCP *:9100 (LISTEN) Open
burrow-1. 1594 burrow 8u IPv6 38288 0t0 TCP *:9105 (LISTEN) Open
java 1599 kafka 109u IPv4 37378 0t0 TCP *:9131 (LISTEN) Open
*java 1599 kafka 117u IPv4 39393 0t0 TCP :40223 (LISTEN) Closed
java 1599 kafka 1445u IPv4 45879 0t0 TCP 100.100.100.10:9093 (LISTEN) Open

broker4.server.com Profiles: burrow and kafka
[[email protected] ~]# lsof -i -P -n | grep LISTEN
prometheu 1572 prometheus 3u IPv6 36065 0t0 TCP *:9100 (LISTEN) Open
java 7866 kafka 109u IPv4 44515 0t0 TCP *:9131 (LISTEN) Open
*java 7866 kafka 117u IPv4 44524 0t0 TCP :43597 (LISTEN) Closed
java 7866 kafka 868u IPv4 37731 0t0 TCP 100.100.100.10:9093 (LISTEN) Open

broker5.server.com Profiles: kafka
[[email protected] ~]# lsof -i -P -n | grep LISTEN
prometheu 1538 prometheus 3u IPv6 35426 0t0 TCP *:9100 (LISTEN) Open
java 1583 kafka 109u IPv4 39227 0t0 TCP *:9131 (LISTEN) Open
*java 1583 kafka 117u IPv4 39290 0t0 TCP :43611 (LISTEN) Closed
java 1583 kafka 728u IPv4 36191 0t0 TCP 100.100.100.10:9093 (LISTEN) Open

I expected CP kafka listener ports to be consistent throughout all brokers across all environments(DEV, UAT, PROD etc).