diff --git a/constants.go b/constants.go
index d605808..dded682 100644
--- a/constants.go
+++ b/constants.go
@@ -139,6 +139,7 @@ const (
 	RPL_AWAY              = "301"
 	RPL_UNAWAY            = "305"
 	RPL_NOWAWAY           = "306"
+	RPL_WHOISREGNICK      = "307"
 	RPL_WHOISUSER         = "311"
 	RPL_WHOISSERVER       = "312"
 	RPL_WHOISOPERATOR     = "313"
@@ -147,17 +148,22 @@ const (
 	RPL_WHOISCHANNELS     = "319"
 	RPL_WHOWASUSER        = "314"
 	RPL_ENDOFWHOWAS       = "369"
+	RPL_WHOISSPECIAL      = "320"
 	RPL_LISTSTART         = "321"
 	RPL_LIST              = "322"
 	RPL_LISTEND           = "323" //nolint:misspell // it's correct.
 	RPL_UNIQOPIS          = "325"
 	RPL_CHANNELMODEIS     = "324"
+	RPL_WHOISACCOUNT      = "330"
 	RPL_NOTOPIC           = "331"
 	RPL_TOPIC             = "332"
+	RPL_INVITELIST        = "336"
+	RPL_ENDOFINVITELIST   = "337"
+	RPL_WHOISACTUALLY     = "338"
 	RPL_INVITING          = "341"
 	RPL_SUMMONING         = "342"
-	RPL_INVITELIST        = "346"
-	RPL_ENDOFINVITELIST   = "347"
+	RPL_INVEXLIST         = "346"
+	RPL_ENDOFINVEXLIST    = "347"
 	RPL_EXCEPTLIST        = "348"
 	RPL_ENDOFEXCEPTLIST   = "349"
 	RPL_VERSION           = "351"
@@ -174,6 +180,8 @@ const (
 	RPL_MOTDSTART         = "375"
 	RPL_MOTD              = "372"
 	RPL_ENDOFMOTD         = "376"
+	RPL_WHOISHOST         = "378"
+	RPL_WHOISMODES        = "379"
 	RPL_YOUREOPER         = "381"
 	RPL_REHASHING         = "382"
 	RPL_YOURESERVICE      = "383"
@@ -213,6 +221,7 @@ const (
 	RPL_ADMINLOC2         = "258"
 	RPL_ADMINEMAIL        = "259"
 	RPL_TRYAGAIN          = "263"
+	RPL_WHOISCERTFP       = "276"
 	ERR_NOSUCHNICK        = "401"
 	ERR_NOSUCHSERVER      = "402"
 	ERR_NOSUCHCHANNEL     = "403"