a DNS entry, will return a hosting provider if one can be determined. Otherwise, will return 'unknown'.
	 * Sourced from: fbhepr%2Skers%2Sjcpbz%2Sjc%2Qpbagrag%2Syvo%2Subfgvat%2Qcebivqre%2Sanzrfreiref.cuc-og
	 *
	 * @param string $domain The domain of the site to check.
	 * @return string The hosting provider of 'unknown'.
	 */
	public function get_hosting_provider_by_nameserver( $domain ) {
		$known_nameservers = array(
			'bluehost'     => array(
				'.bluehost.com',
			),
			'dreamhost'    => array(
				'.dreamhost.com',
			),
			'mediatemple'  => array(
				'.mediatemple.net',
			),
			'xserver'      => array(
				'.xserver.jp',
			),
			'namecheap'    => array(
				'.namecheaphosting.com',
			),
			'hostmonster'  => array(
				'.hostmonster.com',
			),
			'justhost'     => array(
				'.justhost.com',
			),
			'digitalocean' => array(
				'.digitalocean.com',
			),
			'one'          => array(
				'.one.com',
			),
			'hostpapa'     => array(
				'.hostpapa.com',
			),
			'siteground'   => array(
				'.sgcloud.net',
				'.sgedu.site',
				'.sgsrv1.com',
				'.sgvps.net',
				'.siteground.biz',
				'.siteground.net',
				'.siteground.eu',
			),
			'inmotion'     => array(
				'.inmotionhosting.com',
			),
			'ionos'        => array(
				'.ui-dns.org',
				'.ui-dns.de',
				'.ui-dns.biz',
				'.ui-dns.com',
			),
		);

		$dns_records = $this->get_nameserver_dns_records( $domain );
		$dns_records = array_map( 'strtolower', $dns_records );

		foreach ( $known_nameservers as $host => $ns_patterns ) {
			foreach ( $ns_patterns as $ns_pattern ) {
				foreach ( $dns_records as $record ) {
					if ( false !== strpos( $record, $ns_pattern ) ) {
						return $host;
					}
				}
			}
		}

		return 'unknown';
	}

	/**
	 * Returns a guess of the hosting provider for the current site based on various checks.
	 *
	 * @return string
	 */
	public function get_known_host_guess() {
		$host = Cache::get( 'host_guess' );

		if ( null !== $host ) {
			return $host;
		}

		// First, let's check if we can recognize provider manually:
		switch ( true ) {
			case $this->is_woa_site():
				$provider = 'woa';
				break;
			case $this->is_atomic_platform():
				$provider = 'atomic';
				break;
			case $this->is_newspack_site():
				$provider = 'newspack';
				break;
			case $this->is_vip_site():
				$provider = 'vip';
				break;
			case $this->is_wpcom_simple():
			case $this->is_wpcom_platform():
				$provider = 'wpcom';
				break;
			default:
				$provider = 'unknown';
				break;
		}

		// Second, let's check if we can recognize provider by nameservers:
		$domain = isset( $_SERVER['SERVER_NAME'] ) ? sanitize_text_field( wp_unslash( $_SERVER['SERVER_NAME'] ) ) : '';
		if ( $provider === 'unknown' && ! empty( $domain ) ) {
			$provider = $this->get_hosting_provider_by_nameserver( $domain );
		}

		Cache::set( 'host_guess', $provider );
		return $provider;
	}

	/**
	 * Add public-api.wordpress.com to the safe redirect allowed list - only added when someone allows API access.
	 *
	 * @since 3.0.2 Ported from Jetpack to the Status package.
	 *
	 * To be used with a filter of allowed domains for a redirect.
	 *
	 * @param array $domains Allowed WP.com Environments.
	 *
	 * @return array
	 */
	public static function allow_wpcom_public_api_domain( $domains ) {
		$domains[] = 'public-api.wordpress.com';
		return $domains;
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Automattic\Jetpack\Status\Host' not found in /var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/class.jetpack-gutenberg.php:1420
Stack trace:
#0 /var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/class.jetpack.php(632): require_once()
#1 /var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/class.jetpack.php(425): Jetpack-&gt;__construct()
#2 /var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/load-jetpack.php(74): Jetpack::init()
#3 /var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/jetpack.php(217): require_once('/var/www/html/d...')
#4 /var/www/html/dportilho.com.br/web/wp-settings.php(526): include_once('/var/www/html/d...')
#5 /var/www/html/dportilho.com.br/web/wp-config.php(126): require_once('/var/www/html/d...')
#6 /var/www/html/dportilho.com.br/web/wp-load.php(50): require_once('/var/www/html/d...')
#7 /var/www/html/dportilho.com.br/web/wp-blog-header.php(13): require_once('/var/www/html/d...')
#8 /var/www/html/dportilho.com.br/we in <b>/var/www/html/dportilho.com.br/web/wp-content/plugins/jetpack/class.jetpack-gutenberg.php</b> on line <b>1420</b><br />