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https://klaviyo.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from New York, United Stated
301 Moved Permanently
Checks
9
6 PASS 3 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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.klaviyo.com/
200https://klaviyo.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://klaviyo.com/ → https://www.klaviyo.com/

Consistent

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

Certificate validity

305
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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
4 A records, 17 ms lookup
PASS
4 A records, 17 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 99.84.160.90, 99.84.160.29, 99.84.160.59, 99.84.160.113
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1372.awsdns-43.org, ns-1555.awsdns-02.co.uk, ns-224.awsdns-28.com, ns-963.awsdns-56.net
Info::
7 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
A99.84.160.90, 99.84.160.29, 99.84.160.59, 99.84.160.113
AAAA—
CNAME—
NSns-1372.awsdns-43.org, ns-1555.awsdns-02.co.uk, ns-224.awsdns-28.com, ns-963.awsdns-56.net
MX
10 aspmx.l.google.com
20 alt2.aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 aspmx3.googlemail.com
30 aspmx5.googlemail.com
30 aspmx2.googlemail.com
30 aspmx4.googlemail.com
TXT
<whimsical=50616009f2ad1328a4936c7dea52b17d5ccda430>
EU5VQe53KTDQgPby023o4w
MS=ms41847412
ZOOM_verify_wGMfgQPjSL-zAzDdm2XU8g
_cfb1oposxku185vj4xbq9l4w9quli6g
adobe-idp-site-verification=9e57bf0f6edf53f07c7e039868b4f1b6e51536bc50f7255586f5...
anthropic-domain-verification-p3fytn=4myoRaTfbTRj8r93Fnrc8PeBP
apple-domain-verification=E83skdQtNdPkgEvx
asv=6c481b8fcada1fb56d4e8e0ccd7208f0
atlassian-domain-verification=OXy2BCofte+qLejwrfnCxs/Pm8TcOUDHlycMrojlzUJ/hzQc7P...
browserstack-domain-verification=6f82b2a8-d15d-4a47-9a81-da069dd2f881
ca3-3c24d93a383144a0bdad160ad7c82865
canva-site-verification=GNYR54YC11sX8gSczA-szA
cursor-domain-verification-vcq0r5=8pn2RjjwRJZLokxvYx3GYAzYU
datadome-domain-verify=pc6oVOH4qBXbYP94ilrYjZXeqoTA9sbm
docker-verification=458a255c-9892-4f40-bb58-32dc4811bdb9
docusign=627c5187-2423-42c0-a3f0-278758c4283c
drift-domain-verification=8196ac83113fbfe9f3f5dd7ffed50a14964ba3d4ea9af6cdc1c4e3...
dropbox-domain-verification=o0e3d0avitf1
gc-ai-domain-verification-pc2v6s=09X7oJZYdfL6AvlbjXcI469Ba
globalsign-domain-verification=7dd614ba6dd6b9a1e8bb3ef1ff022f0f
google-site-verification=20wDk1W7cenZNN_2nI4_3Cv0vIEgX-f01PKr9Q2WscY
google-site-verification=5SIzMNGlSoiCQuhIrrcyrIqMTk9YH4kt4iCQL0XBo2M
google-site-verification=NmfDaHgZeLxx0qRsM_zeFNn1J-213gjIqwnrOTyyKy8
google-site-verification=pRVCjM-gUtlyHfDfIAOwBxj4-AdMDePqCZRcr4T_Zxo
google-site-verification=wPBMnK_Ong5WdKdVY6JYLMG0S1HG3HrxPocpAHWVKuM
heroku-domain-verification=wrare/xqhd48vkst3byzdi7lugaqyxbxvbrrkye0
hubspot-domain-verification=ZjFhNmQ2MmMtOWExZi00NTg5LTllNzEtZThkZjM3OWRhMGM2
intacct-esk=7AA99D8B166B145DE053AA06A8C0FBF2
jamf-site-verification=9SZ0nz0ZXYgAmDMdrW3BAg
jetbrains-domain-verification=2stm47stmtre2f99umyajv4o0
klaviyo-site-verification=9BX3wh
klaviyo-site-verification=SMJmWs
klaviyo-site-verification=TZXu9S
klaviyo-site-verification=Wu9D8K
klaviyo-site-verification=WuUF6j
klaviyo-site-verification=Xe29Mw
klaviyo-site-verification=Xtm4hg
linear-domain-verification=3zsgrg52kvqa
mgverify=2738a5123a92d4d285faacba79d2d41b8c5a4488952ff2beb3bfe919e7efa0f2
neat-pulse-domain-verification-gXLm7jM=e3409ce1-2253-4d88-8221-2816470f3d91
notion-domain-verification=kvOOIiv8Zqu00GzMazIIiFuDvw7492a9NUJSQFHxKii
onetrust-domain-verification=639763292aa5451481573f1f42492982
openai-domain-verification=dv-xPGOqjqTkH3kutBbEPY6zmI6
postman-domain-verification=23ffcfa891237c623fb193f99c4fe97a0484f7302a1b9af0f732...
slack-domain-verification=KZ0bYU8HYDWuPIRIiDMntP9BBhG6qVSflSNQXr5v
stripe-verification=4ec3ce1f62291184401c65000810ada6ef32ac41d70b19375bcdbd1f3148...
teamviewer-sso-verification=bf196ae73f9f446c96f825391e37ef76
SPF v=spf1 include:mg-spf.greenhouse.io include:_spf.google.com include:mail.zendesk...
wework-site-verification=ybqQeWV4vGyuvvZD
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
1 redirect(s), 205 ms total
PASS
1 redirect(s), 205 ms total
Info::
Single redirect
Got: https://klaviyo.com → https://www.klaviyo.com/ (301)
Info::
WWW normalization redirect

https://klaviyo.com

12 ms · HTTP/1.1

301

https://www.klaviyo.com/

193 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://klaviyo.com30112 msHTTP/1.1AmazonS3
2https://www.klaviyo.com/200193 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 28 URLs
PASS
robots.txt present, sitemap with 28 URLs
Info::
robots.txt is present
Got: 944 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 28 entries
Info::
Sitemap index with 28 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 944 B Sitemaps referenced 1 User-agents OAI-SearchBot, PerplexityBot, * Blocking No — crawling allowed
User-agent: OAI-SearchBot
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: *
Disallow: /analytics
Disallow: /library
Disallow: /campaign
Disallow: /campaigns
Disallow: /campaign-wizard
Disallow: /account
Disallow: /dashboard
Disallow: /integrations
Disallow: /login?*
Disallow: /support
Disallow: /flows
Disallow: /email-templates
Disallow: /templates
Disallow: /asset-library
Disallow: /catalog
Disallow: /conversations
Disallow: /coupons
Disallow: /feeds
Disallow: /flow
Disallow: /forms
Disallow: /list
Disallow: /lists
Disallow: /setup
Disallow: /staff/
Disallow: /tags/
Disallow: /wizard
Disallow: /media/js/app/*?
Disallow: /people
Disallow: /profile/
Disallow: /set-up
Disallow: /token-error
Disallow: /*/info?
Disallow: /sms/unsubscribe?
Disallow: /klaviyo-integration.html?
Disallow: /partner/signup?
Disallow: /settings
Disallow: /*query=
Disallow: /*blaid=
Allow: /_gatsby
Sitemap: https://www.klaviyo.com/sitemap_index.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 28 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
klaviyo.com — via NameCheap, Inc., 14 years, 3 months old, hosted on AWS
PASS
klaviyo.com — via NameCheap, Inc., 14 years, 3 months old, hosted on AWS
Info::
Domain registered until Mar 29, 2032 (6 years 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: NameCheap, Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

2114 days

March 29, 2032

SSL certificate

305 days

Issued by Amazon

Domain age

14 years, 3 months

Registered March 29, 2012

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

99.84.160.29

Registrar

NameCheap, Inc.

Unlocked 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
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameCheap, Inc.
Created March 29, 2012 (14 years, 3 months ago)
Expires March 29, 2032 (6 years)
Last Updated January 30, 2023
Name Servers ns-1372.awsdns-43.org, ns-1555.awsdns-02.co.uk, ns-224.awsdns-28.com, ns-963.awsdns-56.net
DNSSEC Not enabled
Hosting
IP Address 99.84.160.29
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

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 18 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
3 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
2 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
8 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
18 ms
Total Time Total request time from DNS lookup through full response.
19 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 2 ms TLS Handshake 8 ms Server Processing 5 ms Content Transfer 0 ms
A+
CDN & Delivery
AWS CloudFront (Hit from cloudfront)
PASS
AWS CloudFront (Hit from cloudfront)
Info::
Site is served via AWS CloudFront CDN (edge: JFK50-P15)
Got: x-amz-cf-id: _a1JOwxr4ZBEsGCQvtjUgaZO6zyjgnpF5aIn_21j0h-9HtXbjsnk5Q==
Info::
CDN cache status: Hit from cloudfront
CDN Detected: AWS CloudFront
Provider AWS CloudFront Cache Status Hit from cloudfront Evidence x-amz-cf-id: _a1JOwxr4ZBEsGCQvtjUgaZO6zyjgnpF5aIn_21j0h-9HtXbjsnk5Q==
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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