diff --git a/src/ZipCodeValidator/Constraints/ZipCodeValidator.php b/src/ZipCodeValidator/Constraints/ZipCodeValidator.php
index e4e44bf..758fb16 100644
--- a/src/ZipCodeValidator/Constraints/ZipCodeValidator.php
+++ b/src/ZipCodeValidator/Constraints/ZipCodeValidator.php
@@ -146,6 +146,7 @@ class ZipCodeValidator extends ConstraintValidator
         'MX' => '\\d{5}',
         'MY' => '\\d{5}',
         'MZ' => '\\d{4}',
+        'NA' => '\\d{2}0\d{2}',
         'NC' => '988\\d{2}',
         'NE' => '\\d{4}',
         'NF' => '2899',
diff --git a/tests/Constraints/NaZipCodeValidatorTest.php b/tests/Constraints/NaZipCodeValidatorTest.php
new file mode 100644
index 0000000..e84fb15
--- /dev/null
+++ b/tests/Constraints/NaZipCodeValidatorTest.php
@@ -0,0 +1,93 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ZipCodeValidator\Tests\Constraints;
+
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\Context\ExecutionContext;
+use Symfony\Component\Validator\Violation\ConstraintViolationBuilderInterface;
+use ZipCodeValidator\Constraints\ZipCode;
+use ZipCodeValidator\Constraints\ZipCodeValidator;
+
+class NaZipCodeValidatorTest extends TestCase
+{
+    protected ZipCodeValidator $validator;
+
+    public function setUp(): void
+    {
+        $this->validator = new ZipCodeValidator;
+    }
+
+    /**
+     * @dataProvider naValidZipCodes
+     */
+    public function testValidationOfNaZipCode(string $zipCode): void
+    {
+        $constraint = new ZipCode('NA');
+
+        /** @var ExecutionContext|MockObject $contextMock */
+        $contextMock = $this->getMockBuilder(ExecutionContext::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        //be sure that buildViolation never gets called
+        $contextMock->expects($this->never())->method('buildViolation');
+
+        $contextMock->setConstraint($constraint);
+        $this->validator->initialize($contextMock);
+
+        // Test some variations
+        $this->validator->validate($zipCode, $constraint);
+    }
+
+    public static function naValidZipCodes(): array
+    {
+        return [
+            ['13006'],
+            ['22002'],
+            ['19001'],
+            ['10033'],
+        ];
+    }
+
+    /**
+     * @dataProvider naInvalidZipCodes
+     */
+    public function testValidationErrorWithInvalidNaZipCode(string $zipcode): void
+    {
+        $constraint = new ZipCode('NA');
+
+        $violationBuilderMock = $this->getMockBuilder(ConstraintViolationBuilderInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $violationBuilderMock->expects($this->once())->method('setParameter')->willReturnSelf();
+
+        /** @var ExecutionContext|MockObject $contextMock */
+        $contextMock = $this->getMockBuilder(ExecutionContext::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $contextMock->expects($this->once())
+            ->method('buildViolation')
+            ->with($constraint->message)
+            ->willReturn($violationBuilderMock);
+
+        $contextMock->setConstraint($constraint);
+        $this->validator->initialize($contextMock);
+        $this->validator->validate($zipcode, $constraint);
+    }
+
+    public static function naInvalidZipCodes(): array
+    {
+        return [
+            ['12345'],
+            ['14-20'],
+            ['110655'],
+            ['024567'],
+            ['PP023'],
+            ['AC-70'],
+        ];
+    }
+
+}