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https://vercel.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
2
PASS
7
INFO
0
Probed from Santa Clara, United Stated
200 OK
Checks
9
7 PASS 2 REVIEW
C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
TLS Certificate Expiry & Recommendations
77 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

77
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
2 A records, 17 ms lookup
PASS
2 A records, 17 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 198.169.1.1, 198.169.1.65
Info::
No IPv6 (AAAA) records
Info::
2 nameserver(s) configured
Got: ns1.vercel-dns.com, ns2.vercel-dns.com
Info::
5 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 17 ms
Got: 17 ms
A198.169.1.1, 198.169.1.65
AAAA—
CNAME—
NSns1.vercel-dns.com, ns2.vercel-dns.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 aspmx3.googlemail.com
10 aspmx2.googlemail.com
TXT
google-site-verification=J9NjkBE_oybWpa-OHAkV0VjSjIvIBMfp83tdsQCzxK8
SPF v=spf1 include:_netblocks.google.com include:_netblocks2.google.com include:_net...
doordash-verification=kA2ozHfLLU2lEpqQVmJO7DRKwZArKO
ahrefs-site-verification_774361e47cac589ba5ff743f90399b1e5792980bd22f0f4c56bfb1e...
stripe-verification=8ff198a026ba2920fd8f4e45bcc499573d1a342596c6f0f18f3eae226bb8...
apple-domain-verification=80dYVZTf3bf7C8H5
ZOOM_verify_iAqiiWW1TdK-GwbJI7qn1g
stripe-verification=923c7c6074dc94f4b22136b4236a1dc5433a3276b5fc981799771f781d7a...
stripe-verification=69ef655819f74eb6f93f9f7388273112ee8c2439b35502785239d3bf076a...
MS=ms81951275
mixpanel-domain-verify=3069307c-7d73-4581-880a-1b61267d06cb
C575019D1B
SFMC-JchuOOQGseLonwnFdKq2xDV5UnqnvJRjMKyh7rwz
loom-verification=5698251381
notion_verify_82^tYP%}6Q65dbszXu>V?@~stLe]Cm3Dmn8rqe7DZgT1m3o!+PyEbv+Jx04rb%v67B...
docusign=589bb007-2665-4084-b839-9874df0da0cf
docusign=8a27eabb-2ba5-4820-a148-36b0ac9f592b
h1-domain-verification=DmNbUeH65JZUKDLixLxWCEfvFiJcCP6sSR3ymQ3MamqmMN2K
_saml-domain-challenge=1b4981f2-76a2-401f-8f09-a261a97099af
whimsical=34ebc92242a47d7e9a6ae5f42f60ad80fccbf094
_visual-studio-marketplace-vercel.vercel.com:4fe5630e-b256-4d57-9e03-88abeab96b3...
openai-domain-verification=dv-RrobMXwsu06yBo22YAOsZdxP
stripe-verification=e6c56a2c1de7a8a001d69362c33e8ee39536606dae859f9e5fef982ecd10...
stripe-verification=D353787AECFE3E8DF14A07DF171A7A0529DB83B8D7CD0C5FD89A9C42A255...
cursor-domain-verification-f3eygw=YMP9VK0KY2xhJrRKFMpkkyhv1
_sdm0fahneylonoxhro06toamtgfo16s
anthropic-domain-verification-08hmep=rIoWryrKgeXgTzXsASQqNA99q
remote-domain-verification=8be9341d-2ab7-4de7-a26f-68c6af2b30ac
box-domain-verification=968b9e475ce3f9a3bf3a2436eed2cd67082d8312f5e6559eaa7e1d15...
v=MCPv1; k=ed25519; p=53H31Wxaf08fBk8IOIjlWrxy4pK9KGrLRVSB8WSu8rY=
serval-domain-verification-40ct5x=VbdjZnWHkRJwpBE0IwXuriy03
amp-by-sourcegraph-domain-verification-st5f9e=172nCAgVw3POSEMQGXOv24XWO
CAALookup not available with standard resolver
Resolved in 17 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://vercel.com

https://vercel.com

51 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://vercel.com20051 msHTTP/1.1Vercel
A+
Crawlability
robots.txt present, sitemap with 5115 URLs
PASS
robots.txt present, sitemap with 5115 URLs
Info::
robots.txt is present
Got: 516 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 5115 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 516 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-Agent: *

# Allow robots to be able to crawl the OG Image API route and all the subpaths
Allow: /api/og/*
Allow: /api/docs-og*
Allow: /api/product-og*
Allow: /api/templates/og*
Allow: /api/dynamic-og*
Allow: /api/www/avatar/*

Disallow:
Disallow: /api/
Disallow: /oauth
Disallow: /confirm
Disallow: /notifications
Disallow: /old-browser.html
Disallow: /preauthorize
Disallow: /signup?*

# Temporary: Ignore while under development - @plmrry
Disallow: /templates-new*




Sitemap: https://vercel.com/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 5115 entries Valid XML Yes
Sample URLs:
A
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

308https://www.vercel.com/
200https://vercel.com/

HTTP → HTTPS

308http://vercel.com/ → https://vercel.com/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
vercel.com — via Amazon Registrar, Inc., 26 years, 10 months old, hosted on AWS
PASS
vercel.com — via Amazon Registrar, Inc., 26 years, 10 months old, hosted on AWS
Info::
Domain registered until Oct 4, 2029 (3 years, 6 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Amazon Registrar, Inc.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

1144 days

October 4, 2029

SSL certificate

77 days

Issued by Let's Encrypt

Domain age

26 years, 10 months

Registered October 4, 1999

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

198.169.1.65

Registrar

Amazon Registrar, Inc.

Lock status unknown 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
Registrar Amazon Registrar, Inc.
Created October 4, 1999 (26 years, 10 months ago)
Expires October 4, 2029 (3 years, 6 months)
Last Updated December 1, 2022
Name Servers a.zeit-world.co.uk, b.zeit-world.org, e.zeit-world.com, f.zeit-world.net
DNSSEC Not enabled
Hosting
IP Address 198.169.1.65
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.1s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

A+
HTTP Probe Timing
Total 86 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
4 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
9 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
52 ms
Total Time Total request time from DNS lookup through full response.
86 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 4 ms TLS Handshake 9 ms Server Processing 34 ms Content Transfer 34 ms
A+
CDN & Delivery
Vercel (HIT)
PASS
Vercel (HIT)
Info::
Site is served via Vercel CDN
Got: x-vercel-id: sfo1::iad1::cbfst-1775318930183-9edaa2cff435
Info::
CDN cache status: HIT
CDN Detected: Vercel
Provider Vercel Cache Status HIT Evidence x-vercel-id: sfo1::iad1::cbfst-1775318930183-9edaa2cff435
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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