What Is Classic ASP?
FrameworkClassic ASP is Microsoft's original server-side scripting (.asp pages on IIS), older than ASP.NET. Detection relies on the X-Powered-By header, the ASPSESSIONID cookie and .asp links.
Detect Classic ASP on any website:
Why Classic ASP Matters
Framework choice shapes hiring, tooling, deploy targets, and long-term maintenance. If you've inherited a Classic ASP codebase, are comparing it against alternatives, or are trying to recreate a site that uses it, knowing how Classic ASP leaves fingerprints in production HTML is the fastest way to ground-truth the stack without opening the repo. We've fingerprinted Classic ASP on 1 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
Does Classic ASP Mean a Site Was Built With AI?
Classic ASP alone is not an AI signal.
A backend framework is standard web tooling used by hand-coding developers and AI tools alike. It becomes weak supporting context only in combination with other evidence — for example a shadcn/ui + Supabase + Vite bundle that matches a known AI-builder export — and never counts as proof on its own.
How this feeds the score: builder fingerprints, bundle artifacts and AI-tool traces are weighed separately from stack context like frameworks, libraries and hosting. The full breakdown is on How scores work.
How Websites Using Classic ASP Work
- `X-Powered-By: ASP` (not ASP.NET)
- `ASPSESSIONID…` session cookie
- Relative .asp links
- Mostly found on older business sites
Best Practices When Working With Classic ASP
Based on patterns in our scan dataset and the detection evidence tiers.
- →Start by running a Classic ASP detection scan on any URL you're evaluating — the 80+ signal engine returns a confidence score plus the exact markers it matched, which beats reading view-source by hand.
- →Cross-check the result against the full detection evidence in /how-scores-work — confidence tiers tell you whether a match is strong (headers + scripts) or circumstantial (a single HTML pattern).
- →Use Classic ASP detection results alongside the hosting + CDN signals on the same scan report — the framework only tells half the deployment story.
How we detect Classic ASP — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How Our Detector Identifies Classic ASP
Our scanner analyzes multiple layers of a website's technical fingerprint to detect Classic ASP usage.
- HTTP response headers: x-powered-by containing "ASP(?!.NET)" (high-confidence tier)
- Cookies named like "ASPSESSIONID" (medium-confidence tier)
- Signal weights for Classic ASP: 85 points per high-tier match, 55 per medium, 25 per low — a site needs 60+ points before Classic ASP is reported.
Websites Built With Classic ASP
Real sites detected by our scanner
Frequently Asked Questions About Classic ASP
What is Classic ASP?+
Classic ASP is Microsoft's original server-side scripting (.asp pages on IIS), older than ASP.NET. Detection relies on the X-Powered-By header, the ASPSESSIONID cookie and .asp links.
Does Classic ASP mean a website was built with AI?+
Classic ASP alone is not an AI signal. A backend framework is standard web tooling used by hand-coding developers and AI tools alike. It becomes weak supporting context only in combination with other evidence — for example a shadcn/ui + Supabase + Vite bundle that matches a known AI-builder export — and never counts as proof on its own.
Why does Classic ASP matter?+
Framework choice shapes hiring, tooling, deploy targets, and long-term maintenance. If you've inherited a Classic ASP codebase, are comparing it against alternatives, or are trying to recreate a site that uses it, knowing how Classic ASP leaves fingerprints in production HTML is the fastest way to ground-truth the stack without opening the repo. We've fingerprinted Classic ASP on 1 live sites in our database, so the answers here are grounded in real scan data — not marketing copy.
How do we detect Classic ASP?+
Our scanner checks for these signals: HTTP response headers: x-powered-by containing "ASP(?!.NET)" (high-confidence tier); Cookies named like "ASPSESSIONID" (medium-confidence tier); Signal weights for Classic ASP: 85 points per high-tier match, 55 per medium, 25 per low — a site needs 60+ points before Classic ASP is reported.. Each match contributes to a confidence score, and the full evidence tiers are documented at /how-scores-work.
How many websites using Classic ASP are in the database?+
We've fingerprinted 1+ live sites built with Classic ASP across our scan dataset. The list refreshes as new scans come in.
What are the typical characteristics of a Classic ASP website?+
`X-Powered-By: ASP` (not ASP.NET). `ASPSESSIONID…` session cookie. Relative .asp links. Mostly found on older business sites
Related Tools & Technologies
Other frameworks we detect
Ready to put Classic ASP detection to work?
You now know what Classic ASP is, why it matters, how to spot it, and where the detection signals come from. The next step is using that knowledge on a real URL — yours, a competitor's, or a prospect's.