diff --git a/.env-example b/.env-example
index 4fdb0df..59c5fb6 100644
--- a/.env-example
+++ b/.env-example
@@ -66,6 +66,15 @@ VONAGE_BRAND_NAME=
 # Vonage Account API variables
 VONAGE_SECRET_ID=
 
+## Subaccounts
+
+START_DATE=
+NEW_SUBACCOUNT_NAME=
+NEW_SUBACCOUNT_SECRET=
+SUBACCOUNT_KEY=
+AMOUNT=
+COUNTRY=
+
 # Vonage Verify2 API variables
 REQUEST_ID=
 CODE=
diff --git a/Gemfile b/Gemfile
index a0c57e3..9ec994b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem 'dotenv', '2.7.6'
 gem 'faye-websocket', '0.11.0'
-gem 'vonage', '~> 7.2.1'
+gem 'vonage', '~> 7.28'
 gem 'sinatra', '2.1.0'
 gem 'sinatra-contrib', '2.1.0'
 gem 'rack-contrib', '2.3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d8eec6c..08ed918 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,9 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.0)
+    base64 (0.2.0)
     byebug (11.0.1)
+    connection_pool (2.4.1)
     daemons (1.3.1)
     dotenv (2.7.6)
     eventmachine (1.2.7)
@@ -10,21 +12,25 @@ GEM
       eventmachine (>= 0.12.0)
       websocket-driver (>= 0.5.1)
     jaro_winkler (1.5.3)
-    jwt (2.2.2)
+    jwt (2.9.3)
+      base64
     multi_json (1.15.0)
+    multipart-post (2.4.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nexmo-jwt (0.1.2)
-      jwt (~> 2)
+    net-http-persistent (4.0.4)
+      connection_pool (~> 2.2)
     parallel (1.17.0)
     parser (2.6.3.0)
       ast (~> 2.4.0)
+    phonelib (0.9.3)
     rack (2.2.3)
     rack-contrib (2.3.0)
       rack (~> 2.0)
     rack-protection (2.1.0)
       rack
     rainbow (3.0.0)
+    rexml (3.3.9)
     rubocop (0.72.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
@@ -45,21 +51,27 @@ GEM
       rack-protection (= 2.1.0)
       sinatra (= 2.1.0)
       tilt (~> 2.0)
-    sorbet-runtime (0.5.6281)
+    sorbet-runtime (0.5.11625)
     thin (1.8.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     tilt (2.0.10)
     unicode-display_width (1.6.0)
-    vonage (7.2.1)
-      nexmo-jwt (~> 0.1.2)
+    vonage (7.28.0)
+      multipart-post (~> 2.0)
+      net-http-persistent (~> 4.0, >= 4.0.2)
+      phonelib
+      rexml
       sorbet-runtime (~> 0.5)
+      vonage-jwt (~> 0.2.0)
       zeitwerk (~> 2, >= 2.2)
+    vonage-jwt (0.2.0)
+      jwt (~> 2)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.4.2)
+    zeitwerk (2.7.1)
 
 PLATFORMS
   ruby
@@ -73,7 +85,7 @@ DEPENDENCIES
   sinatra (= 2.1.0)
   sinatra-contrib (= 2.1.0)
   thin (= 1.8.0)
-  vonage (~> 7.2.1)
+  vonage (~> 7.28)
 
 BUNDLED WITH
    2.2.3
diff --git a/subaccounts/create-subaccount.rb b/subaccounts/create-subaccount.rb
new file mode 100644
index 0000000..7ca4aab
--- /dev/null
+++ b/subaccounts/create-subaccount.rb
@@ -0,0 +1,17 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+NEW_SUBACCOUNT_NAME = ENV['NEW_SUBACCOUNT_NAME']
+NEW_SUBACCOUNT_SECRET = ENV['NEW_SUBACCOUNT_SECRET']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.create(
+  name: NEW_SUBACCOUNT_NAME,
+  secret: NEW_SUBACCOUNT_SECRET
+)
diff --git a/subaccounts/find-subaccount.rb b/subaccounts/find-subaccount.rb
new file mode 100644
index 0000000..9be52d9
--- /dev/null
+++ b/subaccounts/find-subaccount.rb
@@ -0,0 +1,13 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+subaccount = client.subaccounts.find(subaccount_key: SUBACCOUNT_KEY)
diff --git a/subaccounts/list-balance-transfers.rb b/subaccounts/list-balance-transfers.rb
new file mode 100644
index 0000000..644d9d4
--- /dev/null
+++ b/subaccounts/list-balance-transfers.rb
@@ -0,0 +1,13 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+START_DATE = ENV['START_DATE']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+balance_transfers_list = client.subaccounts.list_balance_transfers(start_date: START_DATE)
diff --git a/subaccounts/list-credit-transfers.rb b/subaccounts/list-credit-transfers.rb
new file mode 100644
index 0000000..d418c8c
--- /dev/null
+++ b/subaccounts/list-credit-transfers.rb
@@ -0,0 +1,13 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+START_DATE = ENV['START_DATE']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+credit_transfers_list = client.subaccounts.list_credit_transfers(start_date: START_DATE)
diff --git a/subaccounts/list-subaccounts.rb b/subaccounts/list-subaccounts.rb
new file mode 100644
index 0000000..9baba50
--- /dev/null
+++ b/subaccounts/list-subaccounts.rb
@@ -0,0 +1,12 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+subaccounts_list = client.subaccounts.list
diff --git a/subaccounts/reactivate-subaccount.rb b/subaccounts/reactivate-subaccount.rb
new file mode 100644
index 0000000..a2e4943
--- /dev/null
+++ b/subaccounts/reactivate-subaccount.rb
@@ -0,0 +1,16 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.update(
+  subaccount_key: SUBACCOUNT_KEY,
+  suspended: false
+)
diff --git a/subaccounts/suspend-subaccount.rb b/subaccounts/suspend-subaccount.rb
new file mode 100644
index 0000000..7c4254a
--- /dev/null
+++ b/subaccounts/suspend-subaccount.rb
@@ -0,0 +1,16 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.update(
+  subaccount_key: SUBACCOUNT_KEY,
+  suspended: true
+)
diff --git a/subaccounts/transfer-balance.rb b/subaccounts/transfer-balance.rb
new file mode 100644
index 0000000..b282ee4
--- /dev/null
+++ b/subaccounts/transfer-balance.rb
@@ -0,0 +1,18 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+AMOUNT = ENV['AMOUNT'].to_f
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.transfer_balance(
+  from: VONAGE_API_KEY,
+  to: SUBACCOUNT_KEY,
+  amount: AMOUNT
+)
diff --git a/subaccounts/transfer-credit.rb b/subaccounts/transfer-credit.rb
new file mode 100644
index 0000000..72b3cb5
--- /dev/null
+++ b/subaccounts/transfer-credit.rb
@@ -0,0 +1,18 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+AMOUNT = ENV['AMOUNT'].to_f
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.transfer_credit(
+  from: VONAGE_API_KEY,
+  to: SUBACCOUNT_KEY,
+  amount: AMOUNT
+)
diff --git a/subaccounts/transfer-number.rb b/subaccounts/transfer-number.rb
new file mode 100644
index 0000000..fefa6ee
--- /dev/null
+++ b/subaccounts/transfer-number.rb
@@ -0,0 +1,20 @@
+require 'dotenv/load'
+require 'vonage'
+
+VONAGE_API_KEY = ENV['VONAGE_API_KEY']
+VONAGE_API_SECRET = ENV['VONAGE_API_SECRET']
+SUBACCOUNT_KEY = ENV['SUBACCOUNT_KEY']
+VONAGE_NUMBER = ENV['VONAGE_NUMBER']
+COUNTRY = ENV['COUNTRY']
+
+client = Vonage::Client.new(
+  api_key: VONAGE_API_KEY,
+  api_secret: VONAGE_API_SECRET
+)
+
+client.subaccounts.transfer_number(
+  from: VONAGE_API_KEY,
+  to: SUBACCOUNT_KEY,
+  number: VONAGE_NUMBER,
+  country: COUNTRY
+)