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Security Scan Report: api-1b4f3451.duosecurity.com

Redirected to:
https://duo.com/
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Submitted: Jul 5, 2026, 4:11:52 PMCompleted: Jul 5, 2026, 4:12:40 PMpubliccompleted
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Summary

This website contacted 4 IPs in 2 countries across 4 domains to perform 2 HTTP transactions. The main domain is duo.com and was registered NaN years ago.

Submitted URL: https://api-1b4f3451.duosecurity.com

Effective URL: https://duo.com/Redirected

The Cisco Umbrella rank of the primary domain is #1,195 of the top 1 million websitesTop 10K Site

AI Security Verdict

Safe Website

Confidence: 95%

1
Risk Score

The site is an official Duo Security subdomain with no malicious indicators; it is safe.

Safety Factors
Established domain age
Official brand subdomain
Absence of forms or credential collection
No malicious intelligence matches
Domain age information unavailable

Details

Page Title

Complete Identity Security & MFA Solutions | Cisco Duo

Scan Type

public

Language

🇺🇸

English

(80% confidence)

Category

government public service

(56%)

Domain Information

Within the commercial generic top-level domain (.com), 'api-1b4f3451.duosecurity.com' is registered and includes subdomain 'api-1b4f3451'. The core label 'duosecurity' covers 11 characters split between 5 vowels and 6 consonants. Tokenizing the label suggests two words: duo, security. Median word length is 5.5 characters. No strong language cues emerged from the frequency lists.

Screenshot

Security scan screenshot of https://api-1b4f3451.duosecurity.com

Page Load Overview

3.08s
Total Load Time
88
HTTP Requests
12
Domains
6.8 MB
Total Size

Language Analysis

Primary Language

🇺🇸English
Code: en
Confidence:80%
Script:Latin
Direction:ltr

Detection Details

Language Code:en
Detection Confidence:80%
Script Type:Latin
HTML Lang Attribute:en
Text Length:11,344 chars
Detector Agreement:100%

Website Classification

Primary Category

government public service56% confidence
Type: spa
Method: ml+structural+ocr_tiebreaker

All Detected Categories

government public service
56%
corporate
35%
technology software
25%

Detected Features

Search
OG: website
Schema.org

Domain & IP Information

RequestsIP AddressLocationAS Autonomous System
223.145.240.102Aws · CLOUDColumbus, Ohio, United States
AS16509Amazon.com, Inc.
22146.75.122.132Fastly · CDNFrankfurt am Main, Hesse, Germany
AS54113Fastly, Inc.
223.161.82.84Cloudfront · CDNUnited States
AS16509Amazon.com, Inc.
222.23.244.120Frankfurt am Main, Hesse, Germany
AS16625Akamai Technologies, Inc.
884--

Content Similarity HashesFor malware variant detection

TLSH (Trend Micro Locality Sensitive Hash)

Security-focused

Specialized for malware detection and similarity analysis

T14F54705779E1321AE6D38369A6A27A897910980FFD335CDCF24D53784FCDBE24C1260A

ssdeep (Context Triggered Piecewise Hashing)

Context-aware

Detects similar content even with modifications

1536:m7P/ddv/6ZYnpWzic2jLff3Mdbj8HZF+hXz9JAj4tB685Hqsz1GLD3PkhOwtGIxG:m7io4hg4tBz9Zz1GLjqhtGIzb5q

sdhash (Similarity Digest Hashing)

High-precision

High-precision similarity detection for forensic analysis

sdhash:3:303508:ApiSBDAPACICCIIAMVNLeMiMD4WY6IEjzAUuGAMAJQDOAkgaCRgq9bB950KgIMSBgQDEpJQ0HAh4LQEhHoAEVHQGQTKNlnPQ

These hashes enable detection of similar websites and malware variants by comparing content similarity even when exact matches aren't found.

Image Hashes

Perceptual Hashes

Average Hash:ffffffffff818181
Perceptual Hash:b9d26c7bc2392c85
Difference Hash:4915160c0b333333
Wavelet Hash:a4c3c7efef818181
Color Hash:#3a7078

Other Hashes

Crop Resistant:4915160c0b333333,5bd2581252723634

Scan History

Scan history not available

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