Domain Age
Unknown
Tranco Rank
#32,922
Operator
Funnull
Threat History
Issues Found
Polyfill.io was a popular service that provided JavaScript polyfills to websites. Following its acquisition by Funnull in 2024, it was identified as a source of malicious code injection, resulting in widespread warnings and service disruption.
URLert analyzed recent scan activity for polyfill.io and found 5 results.
| Status | Target URL | Type | Time |
|---|---|---|---|
| Suspicious | https://cdn.polyfill.io/v2/polyfill.min.js | 19h ago | |
| Parked | https://polyfill.io/ | 2mo ago | |
| Parked | https://polyfill.io/ | 2mo ago |
Historical and current IP address mappings for this domain.
| IP Address / Hosting | Status | Subdomains | Last Seen |
|---|---|---|---|
Hosted by: Cloudflare, Inc. (AS13335) | Active | cdn.polyfill.io polyfill.io | 19 hours ago |
Hosted by: Cloudflare, Inc. (AS13335) | Active | cdn.polyfill.io polyfill.io | 19 hours ago |
Received a suspicious link? Paste the full link to investigate.
Access this classification data programmatically via our API.
{
"domain": "polyfill.io",
"confidence": "high",
"category": {
"purpose": "potentially_malicious",
"specialization": "Compromised Web Service"
},
"identity": {
"headline": "Former web polyfill service now restricted",
"summary": "Polyfill.io was a popular service that provided JavaScript polyfills to websites. Following its acquisition by Funnull in 2024, it was identified as a source of malicious code injection, resulting in widespread warnings and service disruption.",
"operator": "Funnull",
"parent_entity": null,
"topics": [
"web development",
"javascript",
"security",
"supply chain attack"
]
},
"functions": {
"is_ugc_platform": false,
"is_file_host": false,
"is_url_shortener": false,
"is_public_idp": false,
"is_crypto_platform": false,
"allows_user_subdomains": false,
"is_form_builder": false,
"is_document_host": false
},
"facts": {
"registered_date": null,
"rank": 32922,
"hosting_provider": "Cloudflare, Inc."
}
}