Ask Could search engines continue crawling an old domain after a 301 redirect is in place?

[Dean101]

Search engines can continue crawling an old domain even after a 301 redirect is in place. Crawlers often revisit redirected URLs to confirm the redirect remains active and to update their indexes over time. The frequency gradually declines as search engines transfer signals, rankings, and indexing toward the new domain, but it rarely stops immediately. Internal links, external backlinks, bookmarks, and cached references can also keep the old URLs receiving crawl requests. Monitoring server logs helps identify ongoing crawler activity and any unexpected issues.