No threats detected
All checks passed. This site appears legitimate — but always stay alert for phishing even on trusted domains.
Is u21601574.ct.sendgrid.net legit or a scam?
Legitimate SendGrid tracking subdomain with clean scans, 17-year domain history, and zero scam reports.
Analysis Summary
MT Intelligence
The URL belongs to sendgrid.net, Twilio's official email delivery service, and follows their standard click-tracking format. All antivirus engines returned clean results and browser blocklists show no flags. The hosting IP carries only a minimal abuse score with very few reports. Our web research found no complaints, scam mentions, or negative reviews tied to this subdomain. The nginx 404 page is expected because these tracking links are never meant to be visited directly as websites.
Website Preview
Automated page render — captured in a safe sandbox. What an ordinary visitor would see when loading the site. See full visual analysis →
Visual Screenshot Analysis
We capture a fresh screenshot of the live page and ask a vision model to look for scam visual patterns — fake trust badges, countdown timers, overlay pop-ups, and visual clones of legitimate brands.
Visual red flags detected in the screenshot
Screenshot shows a standard nginx 404 Not Found default error page.
What our vision model saw
1 signalPage appears parked or non-functional
Web Research Findings
Our live research agent queries scam-report databases, consumer-review sites, news coverage, and general web search for u21601574.ct.sendgrid.net, then cross-checks business-registration records and look-alike domain patterns. Everything below is pulled from what it actually found.
- Domain is a subdomain of sendgrid.net, a known email delivery and tracking service by Twilio SendGrid.
- Format matches official SendGrid click-tracking URLs: u21601574.ct.sendgrid.net/ls/click?upn=...
- Security scans (e.g., PCRisk, Gridinsoft) report 0/91 engines flagging it as threat; trust scores 79-96/100.
- Appears in legitimate contexts including user verification emails, marketing campaigns, and Autodesk-related emails.
- Similar subdomains (e.g., u28....ct.sendgrid.net) documented in GitHub discussions and forums as normal SendGrid behavior for click tracking.
- No direct scam reports, complaints, or reviews specifically naming this exact subdomain found in searches.
- Domain age given as 6245 days (~17 years); consistent with SendGrid's operational history since ~2009.
Antivirus Engines
Security Scans
Checked against the major public blocklists used by browsers and security tools — no hits.
Domain & Encryption
Server Reputation
Still, stay alert
No major threat indicators — but a clean scan does not guarantee every page is safe, and phishing emails routinely spoof real domains.
- Double-check the exact URL in your address bar
Confirm you are actually on u21601574.ct.sendgrid.net and not a lookalike like u-21601574.ct.sendgrid.net.com or an IDN homoglyph.
- Use a password manager
Password managers only auto-fill on the exact domain they were saved for — they refuse to fill lookalike domains, which is the single best phishing defence.
- OpenDiscuss this site on the forum
If you have first-hand experience with this site — good or bad — share it with the MalwareTips community.
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
Safety FAQ
Common questions about this site, answered from the scan data on this page. These are auto-generated — not hand-written — so they always match the underlying report.
- Our automated security review found no threat indicators on u21601574.ct.sendgrid.net. The site appears legitimate based on the signals we checked, but always stay alert for phishing emails that spoof real domains.
- u21601574.ct.sendgrid.net passed our automated security checks with a trust score of 87/100. No antivirus engines or major blacklists flagged the site at the time of the last scan.
- Yes. u21601574.ct.sendgrid.net presents a valid TLSv1.2 certificate issued by GoDaddy.com, Inc. · Go Daddy Secure Certificate Authority - G2, expiring in 16 days. Note that SSL only encrypts the connection — it does not guarantee that the site itself is trustworthy.
- u21601574.ct.sendgrid.net is 17.1 years old, registered on 4/20/2009 through MarkMonitor Inc.. Scam domains are often freshly registered — a site under 6 months old warrants extra caution.
- No. All 92 antivirus engines in our malware network report u21601574.ct.sendgrid.net as clean.
- No. u21601574.ct.sendgrid.net is not currently listed on the major browser blocklist feeds that modern browsers use.
- u21601574.ct.sendgrid.net resolves to an IP operated by Amazon Data Services Northern Virginia in US (usage type: Data Center/Web Hosting/Transit). Hosting location alone doesn't make a site good or bad, but unusual geography for a brand's claimed country is one of many signals we weigh.
- We cache results for 24 hours. Signed-in MalwareTips members can trigger a manual rescan at any time using the "Rescan" button on the report page, which re-runs every check from scratch and refreshes this page.
User reviews & comments(0)
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