- Case Study
- AI-Assisted Development
A DNS toolkit,
designed and built in-house
PropagationBase is a real-time DNS propagation checker monitoring records across 47+ global resolvers worldwide — built end-to-end by Vanguard Oasis using AI-assisted development, from first line of code to live product.
47+
Global Resolvers
4
Diagnostic Tools
9
DNS Record Types
- The Problem
DNS changes are invisible until they break something
A DNS or email authentication change can look fine from your own machine and still be broken for half the internet — there's rarely one place to check all of it at once.
01
"Is it live yet?"
You update a record and have no reliable way to see how far it's actually propagated across the resolvers your visitors use.
02
Email breaks silently
SPF, DKIM, and DMARC drift out of sync quietly — and you usually find out from a bounce report, not a warning.
03
Tools are scattered
Propagation checks, full record lookups, email auth validation, and reverse DNS each live in a different tool — or a different tab.
- Product Suite
One toolkit, four ways to check your DNS
Everything you need to verify a DNS or email change lives in a single, fast interface — no account required to run a check.
Propagation Checker
Checks how a DNS record is spreading across 47+ global resolvers in real time via DNS-over-HTTPS — instant results, no caching, no waiting.
- A
- AAAA
- CNAME
- MX
- TXT
- NS
- +3 more
Full DNS Inspector
Scans every DNS record type for a domain in one place, checks DKIM selectors, and surfaces common misconfigurations before they cause problems.
- All record types
- DKIM selectors
Email Auth Validator
Audits SPF, DMARC, and DKIM configuration for a domain and identifies exactly which records are missing, misaligned, or malformed.
- SPF
- DMARC
- DKIM
Reverse DNS Lookup
Looks up the PTR record for an IPv4 or IPv6 address and verifies forward-confirmation — useful for mail server and infrastructure checks.
- PTR lookup
- IPv4 / IPv6
- How It Works
From domain to answer in seconds
No sign-up needed to run a check — an account only unlocks saved domains and change alerts.
1
Enter a domain
Pick a tool and enter the domain, IP, or record you want to check.
2
Query 47+ resolvers
PropagationBase queries global resolvers live via DoH — nothing is cached.
3
Compare in real time
Results stream in resolver-by-resolver so you can see propagation as it happens.
4
Spot the issue
Inconsistent, missing, or misconfigured records are flagged instantly.
- How We Built It
Built with AI-assisted development, start to finish
PropagationBase isn't a proof-of-concept — it's a live, public product. We designed the interface, built the resolver infrastructure, and shipped it using Claude-assisted development, the same approach we bring to client projects.
It's a practical demonstration of what our App Development and AI & Machine Learning services can deliver: production-grade software, built faster, without cutting corners on quality.
Faster from idea to live product
AI-assisted workflows compress the build cycle without skipping design, testing, or polish.
Production-grade, not a demo
Real-time infrastructure, 47+ live resolvers, and a genuine public user base.
One team, start to finish
The same in-house capability behind PropagationBase is available for your project.
- Who It's For
Built for anyone who touches DNS
From solo developers to support teams, PropagationBase fits into the moment you actually need it — mid-migration, mid-incident, or mid-setup.
Developers & Agencies
Years of experience delivering high-quality websites across industries.
IT & Network Admins
Confirming changes have taken effect across every office and region.
Email & Deliverability Teams
Validating SPF, DKIM, and DMARC before a campaign goes out.
Hosting & Support Teams
Diagnosing customer DNS tickets without juggling five separate tools.
Curious what AI-assisted development could build for you?
PropagationBase is proof of what our team ships in-house. If you've got an idea for custom software, an internal tool, or a client-facing product, let's talk about what it would take to build it.