What does the 4XX HTTP status code range refer to? November 4, 2018 By CertificationAnswers What does the 4XX HTTP status code range refer to? Server-side errors Client-side errors Redirects Related content Related posts:SEMrush Technical SEO Exam Answers PDFSEO Toolkit Exam for Advanced SEMrush Users AnswersWhich HTTP code ranges refer to crawl errors? Choose…SEMrush Affiliate Program Terms Exam Answers 2018