Is u13728112.ct.sendgrid.net safe?
http://u13728112.ct.sendgrid.net/
Coveragestrong2 of 4 applicable core capabilities
Legitimate SendGrid tracking domain used for email link analytics
The URL points to a SendGrid tracking subdomain that redirects email clicks for analytics. It is not a standalone website and returns a 404 when accessed directly. No malicious behavior is present.
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Where this site sits
- Dangerous1–20
- High Risk21–44
- Moderate Risk45–69
- Low Risk70–84
- Safe85–100
The score combines saved evidence strength and analysis quality. Coverage is reported separately.
01 · Investigation Brief
Investigation Brief
The URL points to a SendGrid tracking subdomain that redirects email clicks for analytics. It is not a standalone website and returns a 404 when accessed directly. No malicious behavior is present.
Evidence from automated analysis
the browser threat feed returned no threat warning for the domain.
The registrable domain is over 17 years old, consistent with established email infrastructure.
Technical versus operator risk
The domain itself is legitimate infrastructure operated by SendGrid for email link tracking and analytics.
Any risk to users stems solely from the content of the original email and the final destination after the redirect, not from this tracking domain.
How the redirect works
When a recipient clicks a tracked link inside a SendGrid-delivered email, the click first routes through this subdomain for analytics before forwarding to the intended destination.
Why the score is 92
The saved analysis does not include enough completed checks for a Safe rating. Coverage remains separate so missing sources cannot be mistaken for clean results.
02 · Security Evidence
Security evidence
Antivirus Engines
0/ 92
No detectionsSaved result - stale
No detections across 92 engines
No antivirus engine in this saved scan raised an adverse result. This is one signal, not a guarantee.
- Malicious
- 0
- Suspicious
- 0
- Total
- 92
All 92 engine results
- 0xSI_f33d - unrated - Clean
- Abusix - clean - Clean
- Acronis - clean - Clean
- ADMINUSLabs - clean - Clean
- AILabs (MONITORAPP) - clean - Clean
- AlienVault - clean - Clean
- alphaMountain.ai - clean - Clean
- AlphaSOC - clean - Clean
- Antiy-AVL - clean - Clean
- ArcSight Threat Intelligence - unrated - Clean
- AutoShun - unrated - Clean
- Bfore.Ai PreCrime - unrated - Clean
- BitDefender - clean - Clean
- Bkav - unrated - Clean
- BlockList - clean - Clean
- Blueliv - clean - Clean
- Certego - clean - Clean
- ChainPatrol - unrated - Clean
- Chong Lua Dao - unrated - Clean
- CINS Army - clean - Clean
- Cluster25 - unrated - Clean
- CRDF - clean - Clean
- Criminal IP - clean - Clean
- CSIS Security Group - unrated - Clean
- CTX AI - clean - Clean
- Cyan - unrated - Clean
- Cyble - clean - Clean
- CyRadar - clean - Clean
- desenmascara.me - clean - Clean
- DNS8 - unrated - Clean
- Dr.Web - clean - Clean
- EmergingThreats - clean - Clean
- Emsisoft - clean - Clean
- Ermes - unrated - Clean
- ESET - clean - Clean
- ESTsecurity - clean - Clean
- Forcepoint ThreatSeeker - clean - Clean
- Fortinet - clean - Clean
- Fortra - unrated - Clean
- G-Data - clean - Clean
- GCP Abuse Intelligence - unrated - Clean
- Google Safe Browsing - clean - Clean
- GreenSnow - clean - Clean
- GreyNoise - unrated - Clean
- Gridinsoft - unrated - Clean
- Guardpot - unrated - Clean
- Heimdal Security - clean - Clean
- Hunt.io Intelligence - unrated - Clean
- IPsum - clean - Clean
- Juniper Networks - clean - Clean
- K7AntiVirus - unrated - Clean
- Kaspersky - unrated - Clean
- LevelBlue - clean - Clean
- Lionic - clean - Clean
- Lumu - unrated - Clean
- Malwared - clean - Clean
- MalwarePatrol - clean - Clean
- MalwareURL - unrated - Clean
- Mimecast - unrated - Clean
- Netcraft - unrated - Clean
- OpenPhish - clean - Clean
- PhishFort - unrated - Clean
- Phishing Database - clean - Clean
- Phishtank - clean - Clean
- PREBYTES - clean - Clean
- PrecisionSec - unrated - Clean
- Quick Heal - clean - Clean
- Quttera - clean - Clean
- Rising - clean - Clean
- SafeToOpen - unrated - Clean
- Sangfor - clean - Clean
- Sansec eComscan - unrated - Clean
- Scantitan - clean - Clean
- SCUMWARE.org - clean - Clean
- Seclookup - clean - Clean
- Snort IP sample list - unrated - Clean
- SOCRadar - unrated - Clean
- Sophos - clean - Clean
- StopForumSpam - clean - Clean
- Sucuri SiteCheck - clean - Clean
- ThreatHive - clean - Clean
- URLhaus - clean - Clean
- URLQuery - unrated - Clean
- Viettel Threat Intelligence - clean - Clean
- VIPRE - unrated - Clean
- ViriBack - clean - Clean
- VX Vault - clean - Clean
- Webroot - clean - Clean
- Xcitium Verdict Cloud - unrated - Clean
- Yandex Safebrowsing - clean - Clean
- ZeroCERT - clean - Clean
- ZeroFox - unrated - Clean
Security Scans
Checked against the browser threat feeds available to this scan — no hit.
What we observed
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Visual context from the captured page
404 Not Found
What the captured page showed
1 observation- 01
404 Not Found
03 · Investigation Story
Investigation story
What the site claims
No page claim could be verified for u13728112.ct.sendgrid.net because no usable page content or saved capture was available.
What we observed
The page itself could not be fully inspected, so the report relies on the other saved checks.
What independent research found
1 external finding were saved and compared with the page evidence.
What remains unverified
2 of the 4 applicable core capabilities did not complete, so those gaps remain visible in the coverage ledger.
Web research findings
Independent findings for u13728112.ct.sendgrid.net, including public complaints, named review sources, registration records, and look-alike-domain evidence. A missing result is shown as unverified, never converted into a clean bill of health.
- Joe Sandboxopen
"It was sent via **SendGrid** (a legitimate, widely-used email service provider), evidenced by the `u13728112.ct.sendgrid.net` tracking domain used throughout all links and the tracking pixel."
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
04 · Domain & Infrastructure
Domain & infrastructure
The plumbing behind the site — who registered it, how it’s encrypted, where it’s hosted, and where it links out. A valid certificate or a calm server doesn’t mean the business is honest — scam sites pass these checks too. Use this to corroborate the verdict, not to overturn it.
Infrastructure map
How the saved page connected to the wider web.
- Domainu13728112.ct.sendgrid.net
- Redirects tou13728112.ct.sendgrid.net
- Hosted byAmazon Technologies Inc.
Domain Timeline
- Apr 20, 2009Domain registered
First appeared in WHOIS records — 17 years old today.
- Aug 14, 2026Saved security review — Reviewed as safe
This saved scan found no active threat signals in the checks it completed.
u13728112.ct.sendgrid.net has operated for years with no threat signals in this review — a long, stable track record, though it is never a guarantee on its own.
Domain & Encryption
Server Reputation
05 · Evidence Ledger
Evidence ledger
- Antiviruspartial
- Browser threat feedcomplete
- Page contentpartial
- Analysiscomplete
- Visual evidencecomplete
The conclusion is supported by the evidence saved with this report.
Technical threat
unknownMalware, phishing, credential theft and hostile infrastructure.
No confirmed evidence in this dimension.
Operator / customer risk
unknownComplaints, withdrawals, business conduct and commercial traps.
No confirmed evidence in this dimension.
Source coverage and freshness
Status shows whether usable evidence was saved; finding shows what that evidence observed.
| Source | Result | Completion | Finding | Freshness |
|---|---|---|---|---|
| Antivirus | 0 of 92 engines flagged | Limited | No saved finding | stale fallback · Aug 14, 2026 |
| Browser protection | No browser threat-list match | Completed | No adverse finding | Not available |
| Page content | Page content was not available for semantic review | Limited | No saved finding | Not available |
| Visual evidence | 1 visible observation saved with the page capture | Completed | No adverse finding | Not available |
| Independent research | 1 independent finding were saved | Completed | No adverse finding | Not available |
- Antivirus
- Result0 of 92 engines flagged
- CompletionLimited
- FindingNo saved finding
- Freshnessstale fallback · Aug 14, 2026
- Browser protection
- ResultNo browser threat-list match
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Page content
- ResultPage content was not available for semantic review
- CompletionLimited
- FindingNo saved finding
- FreshnessNot available
- Visual evidence
- Result1 visible observation saved with the page capture
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Independent research
- Result1 independent finding were saved
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
07 · Safety FAQ
Safety FAQ
Common questions, answered directly from the scan data above — so the answers reflect the saved verdict and evidence in this report.
Is u13728112.ct.sendgrid.net legit and safe?
Is u13728112.ct.sendgrid.net safe to use?
Could a legitimate site like u13728112.ct.sendgrid.net still be used in a scam?
Has u13728112.ct.sendgrid.net been flagged by antivirus engines?
Is u13728112.ct.sendgrid.net on any phishing or malware blacklists?
How old is the u13728112.ct.sendgrid.net domain?
Does u13728112.ct.sendgrid.net have a valid SSL certificate?
Where is u13728112.ct.sendgrid.net hosted?
How often is the u13728112.ct.sendgrid.net report updated?
08 · Final Verdict
Final verdict
Legitimate SendGrid tracking domain used for email link analytics
The URL points to a SendGrid tracking subdomain that redirects email clicks for analytics. It is not a standalone website and returns a 404 when accessed directly. No malicious behavior is present.
09 · Community