u21601574.ct.sendgrid.net
Category: Business
Description of u21601574.ct.sendgrid.net
u21601574.ct.sendgrid.net appears to be a subdomain within SendGrid's infrastructure, likely used for email delivery, click tracking, or related marketing and transactional messaging functions. The domain naming pattern and available categorization data suggest it is associated with business communications, web and email marketing, and information technology services rather than a standalone consumer-facing website.
Based on the domain structure, this host is likely operated as part of a larger cloud email platform used by organizations to send newsletters, account notifications, password resets, and other automated messages. The long registration history, enterprise registrar, and infrastructure profile are consistent with a mature service environment rather than a newly created or ad hoc domain.
Safety Assessment for u21601574.ct.sendgrid.net
At the time of this scan, no security engines reported detections for this domain, with 0 out of 91 engines flagging it. Malware scanning also indicated a clean result, with no flagged files, no flagged external links, no flagged referenced domains, and no iframes observed in the scan data. In addition, the domain was not listed by the checked blacklist and threat-database sources at the time of review.
Contextually, the domain appears to belong to established email-service infrastructure and has a long registration age of more than 17 years, which may reduce the likelihood of opportunistic abuse commonly seen on newly registered domains. However, because this is a tracking-style subdomain under a large email platform, its trustworthiness in practice can still depend on the sender using it and the content of any linked email campaign.
Based on available scan data, no significant threats were detected at the time of this scan.
Technical Description
The host presented a valid SSL/TLS certificate issued by a mainstream certificate authority, with expiration in June 2026. It resolves to an IP hosted on AWS EC2 in Frankfurt and uses an nginx web server, which is consistent with cloud-hosted application or tracking infrastructure. The domain is registered through an enterprise-focused registrar and uses multiple authoritative nameservers, suggesting professionally managed DNS.
One minor technical observation is that DNSSEC appears to be unsigned, which means DNS responses may not benefit from DNSSEC validation. This is not unusual, but it is a modest hardening gap compared with domains that have DNSSEC enabled. No direct technical indicators of compromise were present in the provided scan results.
Share your experience with this website. Was it safe? Did you encounter any issues?