diff --git a/client b/client
index 7f147d8..13cca98 160000
--- a/client
+++ b/client
@@ -1 +1 @@
-Subproject commit 7f147d8630a837760399d0a44846eca89bfa82f5
+Subproject commit 13cca98c9bc6253f4909ea61a2013d10448b026d
diff --git a/common/proto/auth.proto b/common/proto/auth.proto
index 434da56..a808086 100644
--- a/common/proto/auth.proto
+++ b/common/proto/auth.proto
@@ -18,6 +18,7 @@ message RegisterRequest {
   string password_confirmation = 4;
   string role = 5;
   string timezone = 6; // IANA timezone, for example Europe/Bratislava
+  string phone_country = 7; // ISO 3166-1 alpha-2 country used for national phone numbers, for example SK
 }
 
 message AuthResponse {
@@ -41,6 +42,7 @@ message LoginResponse {
   string username = 6;
   AuthorizationSnapshot authorization = 7;
   string timezone = 8;
+  string phone_country = 9;
 }
 
 message SetTimezoneRequest {
diff --git a/common/proto/table_definition.proto b/common/proto/table_definition.proto
index 0a9abba..2e72c74 100644
--- a/common/proto/table_definition.proto
+++ b/common/proto/table_definition.proto
@@ -120,9 +120,11 @@ message ColumnDefinition {
   // Logical column type. Supported values (case-insensitive):
   //   TEXT
   //   BOOLEAN
-  //   INSTANT (absolute timestamp, displayed in the viewer timezone)
+  //   INSTANT (local input resolved in the authenticated user's timezone
+  //            and displayed in the viewer timezone)
   //   USER_DATETIME (local input resolved in the user's timezone)
   //   RAW_DATETIME (timezone-free civil datetime)
+  //   PHONE (international or national phone number; generates extension/type/country/calling-code companions)
   //   TIME (timezone-free time of day)
   //   MONEY (= unconstrained NUMERIC; currency comes from the table)
   //   INT
diff --git a/common/src/proto/descriptor.bin b/common/src/proto/descriptor.bin
index 7b66c28..a641411 100644
Binary files a/common/src/proto/descriptor.bin and b/common/src/proto/descriptor.bin differ
diff --git a/common/src/proto/komp_ac.auth.rs b/common/src/proto/komp_ac.auth.rs
index 0a5ba4c..856e77a 100644
--- a/common/src/proto/komp_ac.auth.rs
+++ b/common/src/proto/komp_ac.auth.rs
@@ -14,6 +14,9 @@ pub struct RegisterRequest {
     /// IANA timezone, for example Europe/Bratislava
     #[prost(string, tag = "6")]
     pub timezone: ::prost::alloc::string::String,
+    /// ISO 3166-1 alpha-2 country used for national phone numbers, for example SK
+    #[prost(string, tag = "7")]
+    pub phone_country: ::prost::alloc::string::String,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct AuthResponse {
@@ -61,6 +64,8 @@ pub struct LoginResponse {
     pub authorization: ::core::option::Option<AuthorizationSnapshot>,
     #[prost(string, tag = "8")]
     pub timezone: ::prost::alloc::string::String,
+    #[prost(string, tag = "9")]
+    pub phone_country: ::prost::alloc::string::String,
 }
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct SetTimezoneRequest {
diff --git a/common/src/proto/komp_ac.table_definition.rs b/common/src/proto/komp_ac.table_definition.rs
index 78374ed..d1b8082 100644
--- a/common/src/proto/komp_ac.table_definition.rs
+++ b/common/src/proto/komp_ac.table_definition.rs
@@ -82,9 +82,11 @@ pub struct ColumnDefinition {
     /// Logical column type. Supported values (case-insensitive):
     /// TEXT
     /// BOOLEAN
-    /// INSTANT (absolute timestamp, displayed in the viewer timezone)
+    /// INSTANT (local input resolved in the authenticated user's timezone
+    /// and displayed in the viewer timezone)
     /// USER_DATETIME (local input resolved in the user's timezone)
     /// RAW_DATETIME (timezone-free civil datetime)
+    /// PHONE (international or national phone number; generates extension/type/country/calling-code companions)
     /// TIME (timezone-free time of day)
     /// MONEY (= unconstrained NUMERIC; currency comes from the table)
     /// INT
diff --git a/server b/server
index 6bcec49..48e20a0 160000
--- a/server
+++ b/server
@@ -1 +1 @@
-Subproject commit 6bcec4924c9af9aeb312bf55c8b150556219019a
+Subproject commit 48e20a0f04d2c2e980e46db00631f8aa52f2457a