diff --git a/src/PostalCodeValidator.php b/src/PostalCodeValidator.php
index 75f90df..2c83a10 100644
--- a/src/PostalCodeValidator.php
+++ b/src/PostalCodeValidator.php
@@ -4,6 +4,13 @@
 
 class PostalCodeValidator
 {
+    /**
+     * The country codes that are aliases for other country codes.
+     */
+    private const ALIASES = [
+        'IC' => 'ES',
+    ];
+
     /**
      * The matching patterns.
      *
@@ -101,6 +108,10 @@ public function patternFor(string $countryCode): ?string
     {
         $countryCode = strtoupper($countryCode);
 
+        if (array_key_exists($countryCode, self::ALIASES)) {
+            $countryCode = self::ALIASES[$countryCode];
+        }
+
         return $this->patternOverrides[$countryCode]
             ?? $this->patterns[$countryCode]
             ?? null;
@@ -117,6 +128,7 @@ public function supports(string $countryCode): bool
         $countryCode = strtoupper($countryCode);
 
         return array_key_exists($countryCode, $this->patternOverrides)
-            || array_key_exists($countryCode, $this->patterns);
+            || array_key_exists($countryCode, $this->patterns)
+            || array_key_exists($countryCode, self::ALIASES);
     }
 }
diff --git a/tests/Unit/PostalCodeValidatorTest.php b/tests/Unit/PostalCodeValidatorTest.php
index 3b5b77e..ff301c4 100644
--- a/tests/Unit/PostalCodeValidatorTest.php
+++ b/tests/Unit/PostalCodeValidatorTest.php
@@ -39,6 +39,14 @@ protected function setUp(): void
         );
     }
 
+    /**
+     * @link https://github.com/axlon/laravel-postal-code-validation/issues/35
+     */
+    public function testCanaryIslands(): void
+    {
+        $this->assertTrue($this->validator->passes('IC', '38580'));
+    }
+
     /**
      * Test if the shipped examples pass validation.
      *