diff --git a/src/Mixins/Expectation.php b/src/Mixins/Expectation.php
index d5f843b9..fcd49604 100644
--- a/src/Mixins/Expectation.php
+++ b/src/Mixins/Expectation.php
@@ -1219,4 +1219,104 @@ final class Expectation
 
         return $this;
     }
+
+    /**
+     * Asserts that the value is an IP address.
+     *
+     * @return self<TValue>
+     */
+    public function toBeIpAddress(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        Assert::assertTrue((bool) filter_var($this->value, FILTER_VALIDATE_IP), $message);
+
+        return $this;
+    }
+
+    /**
+     * Asserts that the value is a MAC address.
+     *
+     * @return self<TValue>
+     */
+    public function toBeMacAddress(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        Assert::assertTrue((bool) filter_var($this->value, FILTER_VALIDATE_MAC), $message);
+
+        return $this;
+    }
+
+    /**
+     * Asserts that the value is a hostname.
+     *
+     * @return self<TValue>
+     */
+    public function toBeHostname(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        Assert::assertTrue((bool) filter_var($this->value, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME), $message);
+
+        return $this;
+    }
+
+    /**
+     * Asserts that the value is a domain name.
+     *
+     * @return self<TValue>
+     */
+    public function toBeDomain(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        $isValid = filter_var($this->value, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME) !== false
+            && str_contains($this->value, '.');
+
+        Assert::assertTrue($isValid, $message);
+
+        return $this;
+    }
+
+    /**
+     * Asserts that the value is a base64-encoded string.
+     *
+     * @return self<TValue>
+     */
+    public function toBeBase64(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        $decoded = base64_decode($this->value, true);
+        Assert::assertTrue($decoded !== false && base64_encode($decoded) === $this->value, $message);
+
+        return $this;
+    }
+
+    /**
+     * Asserts that the value is a hexadecimal string.
+     *
+     * @return self<TValue>
+     */
+    public function toBeHexadecimal(string $message = ''): self
+    {
+        if (! is_string($this->value)) {
+            InvalidExpectationValue::expected('string');
+        }
+
+        Assert::assertTrue(ctype_xdigit($this->value), $message);
+
+        return $this;
+    }
 }
diff --git a/tests/Features/Expect/toBeBase64.php b/tests/Features/Expect/toBeBase64.php
new file mode 100644
index 00000000..06bfe965
--- /dev/null
+++ b/tests/Features/Expect/toBeBase64.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('Zm9v')->toBeBase64() // 'foo' (no padding)
+        ->and('Zm9vYg==')->toBeBase64() // 'foob' (with padding)
+        ->and('Zm9vYmE=')->toBeBase64() // 'fooba' (with padding)
+        ->and('Zm9vYmFy')->toBeBase64() // 'foobar' (no padding)
+        ->and('')->toBeBase64(); // empty string
+});
+
+test('failures', function (): void {
+    expect('not-base64!')->toBeBase64();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid padding', function (): void {
+    expect('AAA')->toBeBase64();
+})->throws(ExpectationFailedException::class);
+
+test('failures with padding only', function (): void {
+    expect('====')->toBeBase64();
+})->throws(ExpectationFailedException::class);
+
+test('failures with malformed input', function (): void {
+    expect('!!invalid!!')->toBeBase64();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeBase64();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('!!invalid!!')->toBeBase64('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('Zm9v')->not->toBeBase64();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toBeDomain.php b/tests/Features/Expect/toBeDomain.php
new file mode 100644
index 00000000..694dcf34
--- /dev/null
+++ b/tests/Features/Expect/toBeDomain.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('example.com')->toBeDomain() // standard domain
+        ->and('sub.example.com')->toBeDomain() // subdomain
+        ->and('my-host.io')->toBeDomain() // with hyphen
+        ->and('example.co.uk')->toBeDomain(); // multi-level TLD
+});
+
+test('failures', function (): void {
+    expect('example')->toBeDomain();
+})->throws(ExpectationFailedException::class);
+
+test('failures with leading dot', function (): void {
+    expect('.example.com')->toBeDomain();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeDomain();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('example')->toBeDomain('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('example.com')->not->toBeDomain();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toBeHexadecimal.php b/tests/Features/Expect/toBeHexadecimal.php
new file mode 100644
index 00000000..aeb7eef7
--- /dev/null
+++ b/tests/Features/Expect/toBeHexadecimal.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('abcdef')->toBeHexadecimal() // lowercase
+        ->and('ABCDEF')->toBeHexadecimal() // uppercase
+        ->and('aBcDeF')->toBeHexadecimal() // mixed case
+        ->and('1234567890')->toBeHexadecimal() // numeric
+        ->and('deadbeef')->toBeHexadecimal(); // alphanumeric
+});
+
+test('failures', function (): void {
+    expect('xyz')->toBeHexadecimal();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid characters', function (): void {
+    expect('ghijkl')->toBeHexadecimal();
+})->throws(ExpectationFailedException::class);
+
+test('failures with zero-x prefix', function (): void {
+    expect('0x1a')->toBeHexadecimal();
+})->throws(ExpectationFailedException::class);
+
+test('failures with empty string', function (): void {
+    expect('')->toBeHexadecimal();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeHexadecimal();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('xyz')->toBeHexadecimal('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('abcdef')->not->toBeHexadecimal();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toBeHostname.php b/tests/Features/Expect/toBeHostname.php
new file mode 100644
index 00000000..3c542df1
--- /dev/null
+++ b/tests/Features/Expect/toBeHostname.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('example')->toBeHostname() // single label
+        ->and('example.com')->toBeHostname() // multiple labels
+        ->and('sub.example.com')->toBeHostname() // subdomain
+        ->and('my-host')->toBeHostname(); // with hyphen
+});
+
+test('failures', function (): void {
+    expect('-example')->toBeHostname();
+})->throws(ExpectationFailedException::class);
+
+test('failures with trailing hyphen', function (): void {
+    expect('example-')->toBeHostname();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeHostname();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('-example')->toBeHostname('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('example.com')->not->toBeHostname();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toBeIpAddress.php b/tests/Features/Expect/toBeIpAddress.php
new file mode 100644
index 00000000..ed4d2d0b
--- /dev/null
+++ b/tests/Features/Expect/toBeIpAddress.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('192.168.1.1')->toBeIpAddress()
+        ->and('::1')->toBeIpAddress()
+        ->and('2001:db8::1')->toBeIpAddress();
+});
+
+test('failures', function (): void {
+    expect('not-an-ip')->toBeIpAddress();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeIpAddress();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('not-an-ip')->toBeIpAddress('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('192.168.1.1')->not->toBeIpAddress();
+})->throws(ExpectationFailedException::class);
diff --git a/tests/Features/Expect/toBeMacAddress.php b/tests/Features/Expect/toBeMacAddress.php
new file mode 100644
index 00000000..012c0b36
--- /dev/null
+++ b/tests/Features/Expect/toBeMacAddress.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Exceptions\InvalidExpectationValue;
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('pass', function (): void {
+    expect('00:1a:2b:3c:4d:5e')->toBeMacAddress() // colon-separated
+        ->and('00-1a-2b-3c-4d-5e')->toBeMacAddress() // hyphen-separated
+        ->and('ff:ff:ff:ff:ff:ff')->toBeMacAddress();
+});
+
+test('failures', function (): void {
+    expect('not-a-mac')->toBeMacAddress();
+})->throws(ExpectationFailedException::class);
+
+test('failures with invalid type', function (): void {
+    expect([])->toBeMacAddress();
+})->throws(InvalidExpectationValue::class, 'Invalid expectation value type. Expected [string].');
+
+test('failures with custom message', function (): void {
+    expect('not-a-mac')->toBeMacAddress('oh no!');
+})->throws(ExpectationFailedException::class, 'oh no!');
+
+test('not failures', function (): void {
+    expect('00:1a:2b:3c:4d:5e')->not->toBeMacAddress();
+})->throws(ExpectationFailedException::class);