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BuiltWhen

When was builtwhen.com built?

Analyzed 19 October 2026. Re-analyze

Estimated launch

October 2026

Low confidenceLikely range: September–October 2026

Based on limited evidence, so treat the date as approximate.

  • No archived copy of the website was found, so the estimate relies on weaker signals.
Website age
Less than a month
From estimated launch
Domain registered
September 2026
Not the launch date
First evidence
October 2026
XML sitemap
Current version
Unknown

History at a glance

The domain and the website have separate lives. Website age is measured from the launch, not from registration.

Domain registeredLikely launch rangeWebsite online

Timeline

  1. September–October 2026

    Estimated launch

    Based on: oldest page date in the sitemap.

    Not certainView evidence

  2. September 2026

    Domain registered

    The domain was registered. This is not the same as the website launching.

    Confirmed

  3. October 2026

    Current website

    “BuiltWhen | When was this website built?”, built with Next.js

    ConfirmedVisit

Built with today

Detected on the live homepage — it runs on Next.js. Select a technology to see the evidence.

Hosting / CDN
Vercel, 100% confidence. Show evidence.
  • Server header is Vercel
  • x-vercel-id response header
  • 100% detection confidence
Framework
Next.js, 90% confidence. Show evidence.
  • Loads bundles from /_next/static/
  • 90% detection confidence
JavaScript library
React, 81% confidence. Show evidence.
  • Implied by Next.js
  • 81% detection confidence
CSS framework
Tailwind CSS, 65% confidence. Show evidence.
  • Many responsive utility classes (e.g. md:flex, lg:px-8)
  • 65% detection confidence
Why we think it launched in 20262 pieces of evidence, each linked to its source
  • Oldest page date in the sitemap: October 2026.
  • Domain registered: September 2026 (1 month earlier).
  1. September 2026

    Domain registered

    The domain's current registration began on this date. A website can only launch after this, but often launches much later.

    Sets the earliest possible dateRDAP registry dataView source

  2. October 2026

    Oldest page date in the sitemap

    The oldest "last modified" date among 16 sitemap entries.

    The estimate is based on thisXML sitemapView source

What we checked

  • Domain registry (RDAP)Checked
  • Internet Archive indexChecked, nothing found
  • Live websiteChecked
  • Archived page comparisonNot applicable

BuiltWhen estimates from observable evidence and can be wrong. How estimates work

Domain registrationRegistered September 2026 · Name.com, Inc.
Registered
30 September 2026
Registration expires
30 September 2027
Registry record updated
30 September 2026
Registrar
Name.com, Inc.
Nameservers
ns1.vercel-dns.com, ns2.vercel-dns.com

Public registry data via RDAP. Registrant details are never collected.

Check another website