Cybersecurity Rating
by ImmuniWeb® CyberScore™

Hostname	URL	Grade	Tested on
arbitrum.io	https://arbitrum.io	N	November 6th, 2026 11:03
www.arbitrum.io	https://www.arbitrum.io	N	November 6th, 2026 10:55
jobs.arbitrum.io	https://arbitrum.foundation/careers	C	November 6th, 2026 11:03
retryable-tx-panel-nitro.arbitrum.io	https://retryable-tx-panel-nitro.arbitrum.io/	A-	November 6th, 2026 11:03
link.arbitrum.io	https://link.arbitrum.io/	A	November 6th, 2026 11:02

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Website Privacy Rating | Overview

The total number of subdomains is capped at 50.

Hostname	URL	Grade	Tested on
arbitrum.io	https://arbitrum.io/	A+	November 6th, 2026 11:16
www.arbitrum.io	https://www.arbitrum.io	N	November 6th, 2026 11:16
jobs.arbitrum.io	https://arbitrum.foundation/careers	A+	November 6th, 2026 11:16
retryable-tx-panel-nitro.arbitrum.io	https://retryable-tx-panel-nitro.arbitrum.io/	B+	November 6th, 2026 11:16
link.arbitrum.io	https://link.arbitrum.io/	A	November 6th, 2026 11:16

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The total number of subdomains is capped at 50.

Hostname	URL	Protocol	Grade	Tested on
arbitrum.io	https://arbitrum.io 104.20.39.96:443	HTTPS	B+	November 6th, 2026 10:56
www.arbitrum.io	https://www.arbitrum.io 76.76.21.142:443	HTTPS	A+	November 6th, 2026 10:55
jobs.arbitrum.io	https://jobs.arbitrum.io 172.66.171.45:443	HTTPS	A-	November 6th, 2026 11:02
retryable-tx-panel-nitro.arbitrum.io	https://retryable-tx-panel-nitro.arbitrum.io 76.76.21.61:443	HTTPS	A+	November 6th, 2026 11:02
link.arbitrum.io	https://link.arbitrum.io 172.66.171.45:443	HTTPS	A-	November 6th, 2026 11:02

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Hostname	Grade	Tested on
arbitrum.io	A	November 6th, 2026 10:56

Email Server Security Report
A total of 5 email servers were analyzed. Open relay was not detected, SMTP enumeration was not detected, a secure authentication was enforced across all tested servers, and PTR records were properly configured. The average response latency was approximately 0.042s.
Email SSL/TLS Encryption Report
SSL/TLS security testing was completed for 5 email servers. Server grade is B.
Email Server DNS Security Report
SPF is set properly, DKIM is set properly, and DMARC is set properly. MTA-STS is not configured for this domain. A and MX DNS records are fully validated.
Email Server Black and Spam Lists Report
No email servers were found on blacklists.

No vibe-coded or AI-created code patterns detected across 49 websites.
No leaks of AI tokens or other AI-related and sensitive data detected on the Dark Web.
No leaks of AI tokens or other AI-related and sensitive data detected across 49 websites.

Hostname	Tested on
arbitrum.io	November 6th, 2026 10:54

Dark Web Exposure Report
A total of 1 dark web incident detected, containing 3 mentions of the domain. 1 out of 1 incident originates from Malware Logs. Mentions in Malware Logs represent the most common source of compromised information, accounting for 3 of the 3 detected domain mentions on the Dark Web.
Unprotected Cloud Storage Report
No cloud storage buckets found.
Phishing Websites Report
64 potential phishing URLs detected. Example hostnames: 1uinch.org and arb1trum.com; the full list is available in the detailed report.
Cybersquatting Domains Report
29 potential cybersquatting domains detected. Example domains: arbitram.io, arbitrum.cc and tarbitrum.com; additional cybersquatting domains are available in the detailed report.
Typosquatting Domains Report
20 potential typosquatting domains detected. Example domains: arbbitrum.io, arbiitrum.io and arbitrmu.io; additional typosquatting domains are available in the detailed report.
Fake Accounts in Social Media Report
No squatted social network accounts found.

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