diff --git a/migrations/Version20260403220210.php b/migrations/Version20260403220210.php
new file mode 100644
index 0000000..545efb2
--- /dev/null
+++ b/migrations/Version20260403220210.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20260403220210 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE domain (id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL, fqdn VARCHAR(255) NOT NULL, registrar VARCHAR(255) DEFAULT NULL, zone_cloudflare VARCHAR(50) DEFAULT NULL, zone_id_cloudflare VARCHAR(100) DEFAULT NULL, expired_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL, is_gestion BOOLEAN NOT NULL, is_billing BOOLEAN NOT NULL, created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, updated_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL, customer_id INT NOT NULL, PRIMARY KEY (id))');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_A7A91E0BC1A19758 ON domain (fqdn)');
+        $this->addSql('CREATE INDEX IDX_A7A91E0B9395C3F3 ON domain (customer_id)');
+        $this->addSql('ALTER TABLE domain ADD CONSTRAINT FK_A7A91E0B9395C3F3 FOREIGN KEY (customer_id) REFERENCES customer (id) ON DELETE CASCADE NOT DEFERRABLE');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE domain DROP CONSTRAINT FK_A7A91E0B9395C3F3');
+        $this->addSql('DROP TABLE domain');
+    }
+}
diff --git a/src/Entity/Domain.php b/src/Entity/Domain.php
new file mode 100644
index 0000000..f0d6f8b
--- /dev/null
+++ b/src/Entity/Domain.php
@@ -0,0 +1,177 @@
+<?php
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class Domain
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: Customer::class)]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    private Customer $customer;
+
+    #[ORM\Column(length: 255, unique: true)]
+    private string $fqdn;
+
+    #[ORM\Column(length: 255, nullable: true)]
+    private ?string $registrar = null;
+
+    #[ORM\Column(length: 50, nullable: true)]
+    private ?string $zoneCloudflare = null;
+
+    #[ORM\Column(length: 100, nullable: true)]
+    private ?string $zoneIdCloudflare = null;
+
+    #[ORM\Column(nullable: true)]
+    private ?\DateTimeImmutable $expiredAt = null;
+
+    #[ORM\Column]
+    private bool $isGestion = false;
+
+    #[ORM\Column]
+    private bool $isBilling = false;
+
+    #[ORM\Column]
+    private \DateTimeImmutable $createdAt;
+
+    #[ORM\Column(nullable: true)]
+    private ?\DateTimeImmutable $updatedAt = null;
+
+    public function __construct(Customer $customer, string $fqdn)
+    {
+        $this->customer = $customer;
+        $this->fqdn = strtolower(trim($fqdn));
+        $this->createdAt = new \DateTimeImmutable();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getCustomer(): Customer
+    {
+        return $this->customer;
+    }
+
+    public function getFqdn(): string
+    {
+        return $this->fqdn;
+    }
+
+    public function setFqdn(string $fqdn): static
+    {
+        $this->fqdn = strtolower(trim($fqdn));
+
+        return $this;
+    }
+
+    public function getRegistrar(): ?string
+    {
+        return $this->registrar;
+    }
+
+    public function setRegistrar(?string $registrar): static
+    {
+        $this->registrar = $registrar;
+
+        return $this;
+    }
+
+    public function getZoneCloudflare(): ?string
+    {
+        return $this->zoneCloudflare;
+    }
+
+    public function setZoneCloudflare(?string $zoneCloudflare): static
+    {
+        $this->zoneCloudflare = $zoneCloudflare;
+
+        return $this;
+    }
+
+    public function getZoneIdCloudflare(): ?string
+    {
+        return $this->zoneIdCloudflare;
+    }
+
+    public function setZoneIdCloudflare(?string $zoneIdCloudflare): static
+    {
+        $this->zoneIdCloudflare = $zoneIdCloudflare;
+
+        return $this;
+    }
+
+    public function getExpiredAt(): ?\DateTimeImmutable
+    {
+        return $this->expiredAt;
+    }
+
+    public function setExpiredAt(?\DateTimeImmutable $expiredAt): static
+    {
+        $this->expiredAt = $expiredAt;
+
+        return $this;
+    }
+
+    public function isGestion(): bool
+    {
+        return $this->isGestion;
+    }
+
+    public function setIsGestion(bool $isGestion): static
+    {
+        $this->isGestion = $isGestion;
+
+        return $this;
+    }
+
+    public function isBilling(): bool
+    {
+        return $this->isBilling;
+    }
+
+    public function setIsBilling(bool $isBilling): static
+    {
+        $this->isBilling = $isBilling;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): \DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getUpdatedAt(): ?\DateTimeImmutable
+    {
+        return $this->updatedAt;
+    }
+
+    public function setUpdatedAt(?\DateTimeImmutable $updatedAt): static
+    {
+        $this->updatedAt = $updatedAt;
+
+        return $this;
+    }
+
+    public function isExpired(): bool
+    {
+        return null !== $this->expiredAt && $this->expiredAt < new \DateTimeImmutable();
+    }
+
+    public function isExpiringSoon(int $days = 30): bool
+    {
+        if (null === $this->expiredAt) {
+            return false;
+        }
+
+        return $this->expiredAt < (new \DateTimeImmutable())->modify('+'.$days.' days');
+    }
+}
diff --git a/tests/Entity/DomainTest.php b/tests/Entity/DomainTest.php
new file mode 100644
index 0000000..c268e98
--- /dev/null
+++ b/tests/Entity/DomainTest.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace App\Tests\Entity;
+
+use App\Entity\Customer;
+use App\Entity\Domain;
+use App\Entity\User;
+use PHPUnit\Framework\TestCase;
+
+class DomainTest extends TestCase
+{
+    private function createCustomer(): Customer
+    {
+        $user = new User();
+        $user->setEmail('c@t.com');
+        $user->setFirstName('C');
+        $user->setLastName('T');
+        $user->setPassword('h');
+
+        return new Customer($user);
+    }
+
+    public function testConstructor(): void
+    {
+        $customer = $this->createCustomer();
+        $domain = new Domain($customer, 'Example.COM ');
+
+        $this->assertNull($domain->getId());
+        $this->assertSame($customer, $domain->getCustomer());
+        $this->assertSame('example.com', $domain->getFqdn());
+        $this->assertNull($domain->getRegistrar());
+        $this->assertNull($domain->getZoneCloudflare());
+        $this->assertNull($domain->getZoneIdCloudflare());
+        $this->assertNull($domain->getExpiredAt());
+        $this->assertFalse($domain->isGestion());
+        $this->assertFalse($domain->isBilling());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $domain->getCreatedAt());
+        $this->assertNull($domain->getUpdatedAt());
+    }
+
+    public function testSetters(): void
+    {
+        $domain = new Domain($this->createCustomer(), 'siteconseil.fr');
+
+        $domain->setFqdn(' ESY-WEB.DEV ');
+        $this->assertSame('esy-web.dev', $domain->getFqdn());
+
+        $domain->setRegistrar('OVH');
+        $this->assertSame('OVH', $domain->getRegistrar());
+
+        $domain->setZoneCloudflare('active');
+        $this->assertSame('active', $domain->getZoneCloudflare());
+
+        $domain->setZoneIdCloudflare('zone_abc123');
+        $this->assertSame('zone_abc123', $domain->getZoneIdCloudflare());
+
+        $expiry = new \DateTimeImmutable('2027-01-01');
+        $domain->setExpiredAt($expiry);
+        $this->assertSame($expiry, $domain->getExpiredAt());
+
+        $domain->setIsGestion(true);
+        $this->assertTrue($domain->isGestion());
+
+        $domain->setIsBilling(true);
+        $this->assertTrue($domain->isBilling());
+
+        $now = new \DateTimeImmutable();
+        $domain->setUpdatedAt($now);
+        $this->assertSame($now, $domain->getUpdatedAt());
+    }
+
+    public function testIsExpired(): void
+    {
+        $domain = new Domain($this->createCustomer(), 'test.fr');
+
+        $this->assertFalse($domain->isExpired());
+
+        $domain->setExpiredAt(new \DateTimeImmutable('-1 day'));
+        $this->assertTrue($domain->isExpired());
+
+        $domain->setExpiredAt(new \DateTimeImmutable('+1 year'));
+        $this->assertFalse($domain->isExpired());
+    }
+
+    public function testIsExpiringSoon(): void
+    {
+        $domain = new Domain($this->createCustomer(), 'test.fr');
+
+        $this->assertFalse($domain->isExpiringSoon());
+
+        $domain->setExpiredAt(new \DateTimeImmutable('+15 days'));
+        $this->assertTrue($domain->isExpiringSoon(30));
+
+        $domain->setExpiredAt(new \DateTimeImmutable('+60 days'));
+        $this->assertFalse($domain->isExpiringSoon(30));
+    }
+}