What is MSIECrawler?
MSIECrawler is an uncategorized agent. Agent Analytics can track when it visits your website.
Overview
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | August 1, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
MSIECrawler has no established behavior profile yet. Read its pattern in Agent Analytics: steady polite crawling suggests an unannounced index, while fast deep sweeps suggest scraping. Its user agent string and IP addresses are the best clues to who runs it.
MSIECrawler's User Agent
| User Agent | Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0; MSIECrawler) |
How To Block MSIECrawler With Robots.txt
Add this rule to your robots.txt file to block MSIECrawler from accessing your entire website, or use Automatic Robots.txt to block all uncategorized agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: MSIECrawler # https://knownagents.com/agents/msiecrawler
Disallow: /Global Insights for MSIECrawler
As of August 1, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
3% of top websites block MSIECrawler in their robots.txt files.
Overall Uncategorized Traffic
2.3% of all web traffic came from uncategorized agents.
Top Visited Website Categories
The types of websites most frequently visited by MSIECrawler.
Frequently Asked Questions
Should I Block MSIECrawler?
Watch it first. MSIECrawler has not been categorized yet, so there is no track record to lean on. Check which pages it requests and how often, and block it if the traffic is heavy or pointed at content you would not give an unknown bot. For comparison, 3% of the top websites we track already have robots.txt rules for MSIECrawler.
Does MSIECrawler Follow Robots.txt Rules?
Yes. MSIECrawler is expected to follow robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms MSIECrawler actually follows it.
Does MSIECrawler Access Private Content?
Unknown. MSIECrawler has no documented scope, so watch what it actually requests. Repeated hits on login or admin paths are the signal to block it.
Why Is MSIECrawler Visiting My Website?
Nobody knows yet. MSIECrawler is undocumented, so until its operator explains it, its behavior on your site is the only evidence of its intent.
How Can I Tell if MSIECrawler Is Visiting My Website?
Agent Analytics tracks MSIECrawler visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "MSIECrawler". Log the paths it requests and how often, since nothing about it is documented. Keep in mind that MSIECrawler doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.