diff --git a/.changeset/silly-games-float.md b/.changeset/silly-games-float.md
new file mode 100644
index 000000000..5401c313b
--- /dev/null
+++ b/.changeset/silly-games-float.md
@@ -0,0 +1,5 @@
+---
+'@scaleway/regex': minor
+---
+
+Add subdomain regex
diff --git a/packages/regex/src/__tests__/index.ts b/packages/regex/src/__tests__/index.ts
index d1add88f3..261db15b2 100644
--- a/packages/regex/src/__tests__/index.ts
+++ b/packages/regex/src/__tests__/index.ts
@@ -41,6 +41,7 @@ import {
   sixDigitsCode,
   spaces,
   uppercaseBasicDomain,
+  uppercaseBasicSubdomain,
   url,
 } from '..'
 
@@ -547,6 +548,33 @@ describe('@regex', () => {
       expect(uppercaseBasicDomain.test(string)).toBe(expected)
     })
   })
+
+  describe('uppercaseBasicSubdomain', () => {
+    test.each([
+      [asciiLetters, false],
+      [asciiLowercase, false],
+      [asciiUppercase, false],
+      [backupKeyTest, false],
+      [domain, false],
+      [subDomain, true],
+      [dashStartDomain, false],
+      [uppercaseDomain, true],
+      [longTldDomain, true],
+      [digitsTest, false],
+      [emailTest, false],
+      [octdigits, false],
+      [hexdigits, false],
+      [printable, false],
+      [punctuation, false],
+      [whitespace, false],
+      [cronTest, false],
+      [macAddress1, false],
+      ...(urls.map(urlString => [urlString, false]) as [string, boolean][]),
+    ])('should match regex %s to be %s', (string, expected) => {
+      expect(uppercaseBasicSubdomain.test(string)).toBe(expected)
+    })
+  })
+
   describe('advancedDomain', () => {
     test.each([
       [asciiLetters, false],
diff --git a/packages/regex/src/index.ts b/packages/regex/src/index.ts
index e9b397d8a..047b40588 100644
--- a/packages/regex/src/index.ts
+++ b/packages/regex/src/index.ts
@@ -26,6 +26,8 @@ export const backupKey = /^[A-Z0-9]{32}$/
 export const basicDomain = /^[a-z0-9-]+(\.[a-z0-9-]{1,63})+$/
 export const uppercaseBasicDomain =
   /^(?![-])+[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]{1,63})+$/
+export const uppercaseBasicSubdomain =
+  /^(?![-])+[a-zA-Z0-9-]+\.[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]{1,63})+$/
 // It will include special character that are non ASCII but valid for internationalized domain names (IDN)
 export const advancedDomainName =
   /^(?:(?:(?:[a-zA-Z0-9À-ÖØ-öø-ÿ](?:[a-zA-Z0-9À-ÖØ-öø-ÿ-]{0,61}[a-zA-Z0-9À-ÖØ-öø-ÿ])?)\.)+[a-zA-Z]{2,}|(?:[0-9]{1,3}\.){3}[0-9]{1,3})(?::[\d]{1,5})?$/