Variable: erc-default-port-tls
erc-default-port-tls is a variable defined in erc.el.gz.
Value
6697
Documentation
IRC port to use for encrypted connections if it cannot be detected otherwise.
Probably introduced at or before Emacs version 26.1.
Source Code
;; Defined in /usr/src/emacs/lisp/erc/erc.el.gz
(defconst erc-default-port-tls 6697
"IRC port to use for encrypted connections if it cannot be \
detected otherwise.")