api.www4.irs.gov
Category: Government
Description of api.www4.irs.gov
api.www4.irs.gov appears to be a subdomain associated with the United States Internal Revenue Service (IRS), the federal agency responsible for tax administration and related public services in the U.S. Based on the domain structure, it likely supports application programming interface (API) functions or backend web services connected to IRS online systems rather than serving as a consumer-facing informational website.
The parent domain irs.gov is a long-established government domain, and the use of the .gov namespace generally indicates operation by a U.S. government entity or an authorized public-sector organization. In this case, the subdomain naming suggests technical infrastructure used to deliver data, authentication, or service integrations for IRS web properties.
Safety Assessment for api.www4.irs.gov
Based on available scan data, no threats were detected at the time of this scan. The domain was not flagged by any of the 91 security engines referenced, and malware scanning did not report suspicious files, malicious scripts, flagged external links, or iframe-related concerns. In addition, the domain was reported as clean by the checked threat-database and blacklist sources.
Several contextual factors also support a low-risk assessment at this point in time: the domain is nearly three decades old, uses the official .gov namespace, and has DNSSEC enabled. While no automated scan can guarantee ongoing safety, there were no notable indicators of phishing, malware distribution, or deceptive behavior in the provided results. Based on available scan data, no significant threats were detected at the time of this scan.
Technical Description
The domain uses a valid SSL/TLS certificate issued by Let's Encrypt, with expiry shown as 2026-08-17. DNSSEC is enabled and signed, which may help protect against certain DNS tampering risks. The domain resolves to an IP hosted by Akamai Technologies in the United States, suggesting use of a large content delivery or edge infrastructure provider.
Nameserver data indicates use of secondary Cloudflare nameservers, while hosting appears to be delivered through Akamai infrastructure. No technical security issues were evident from the provided scan metadata, although the web server software and supported protocol details were not identified in the scan output.
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