Contact.php

<?php

namespace VendorModuleBlock;

class Contact extends MagentoFrameworkViewElementTemplate
{
    protected $_storeInfo;

    public function __construct(
        MagentoStoreModelInformation $storeInfo
    )
    {
        $this->_storeInfo = $storeInfo;
    }
    public function getPhoneNumber()
    {
        return $this->_storeInfo->getInformationObject()->getPhone();
    }

}

<?php
    echo "Phone: ".$block->getPhoneNumber();
?>