Developer workflow
Pre-launch domain and TLS check
Shipping a new hostname fails more often on DNS and TLS than on app code. This workflow checks resolution, registration details, certificate validity, and common security headers before you flip traffic.
Category: Developer · Last updated: 2026-07-22
Step-by-step path
Steps (4 tools)
Confirm DNS, WHOIS, SSL certificates, and security headers before go-live.
Step 1: Check DNS
Tool: DNS Lookup
Verify A/AAAA/CNAME records resolve to the expected targets.
Open DNS Lookup- On your device
- No signup
Step 2: Review registration
Tool: WHOIS Lookup
Confirm registrar, expiry, and nameserver details look correct.
Open WHOIS Lookup- On your device
- No signup
Step 3: Validate TLS
Tool: SSL Checker
Check certificate chain, expiry, and hostname match.
Open SSL Checker- On your device
- No signup
Step 4: Scan security headers
Tool: Security Headers Checker
Review HSTS, CSP, and related response headers on HTTPS.
Open Security Headers Checker- On your device
- No signup
When to use this workflow
- You pointed a new domain or subdomain at hosting and want confirmation.
- Users report certificate warnings after a cutover.
- You are preparing a launch checklist for staging → production.
Tips
Tips for better results
- Allow time for DNS TTL to expire when comparing old vs new records.
- SSL Checker should cover the exact hostname users will type, including www.
- Pair this with the technical SEO health workflow after the site responds 200.
FAQ
Frequently asked questions
Do these lookups run from my browser?
Network lookup tools contact public resolvers or the target host as described on each tool page—they are diagnostic, not a hosting control panel.
Why do DNS results still show the old IP?
Caches and TTLs can delay updates. Re-check from another network after the TTL window.
Is a green SSL check enough?
It confirms certificate basics. Still test redirects, HSTS, and the full user journey.
Keep going
Related workflows
Check HTTP status and headers, security headers, Core Web Vitals concepts, and redirects.
- Check status codes
- Inspect headers
- Review security headers
- Review CWV concepts
- Audit redirects
Check DNS, SSL certificates, HTTP headers, and structured data before you go live.
- Check DNS
- Check SSL
- Inspect headers
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- Draft robots.txt
- Test rules
- Build sitemap
- Validate sitemap
- Check redirects
- Find broken links