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https://bestbuy.com

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
8
PASS
8
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
17
8 PASS 8 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
DNSSEC
Unsigned (DNSSEC not deployed)
REVIEW
Unsigned (DNSSEC not deployed)
Info::
DNSSEC is not deployed
The zone is not DNSSEC-signed. Users on validating resolvers (Cloudflare 1.1.1.1, Quad9 9.9.9.9, growing default in mobile resolvers) get no protection against DNS spoofing for this domain. Most registrars now offer DNSSEC at a single click; consider enabling it for sites where authenticity matters (banking, healthcare, government).
B
CAA Records
No CAA records (any CA may issue certificates)
REVIEW
No CAA records (any CA may issue certificates)
Info::
No CAA records published
Without CAA records, any publicly-trusted CA can issue certificates for this domain. Adding a CAA record (`yourdomain. IN CAA 0 issue "letsencrypt.org"`) restricts issuance to CAs you authorize. Required by CAB Forum baseline since 2017; the default of 'any CA' is widely supported but is the broader attack surface for issuance fraud.
B
Reverse DNS
0/1 IPs match cert SAN
REVIEW
0/1 IPs match cert SAN
Info::
PTR for 2.22.44.172 does not match any cert SAN: a2-22-44-172.deploy.static.akamaitechnologies.com
Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree.
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
245 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

245
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • Enable DNSSEC on your domain for DNS spoofing protection
B
CDN Cache Observability
No CDN cache-status headers in the response
REVIEW
No CDN cache-status headers in the response
Info::
No CDN cache-status headers in the response
Without an X-Cache / CF-Cache-Status / X-Vercel-Cache / Age header, you can't tell from outside whether a request hit the cache or went to origin. Operationally important: enables debugging stale-content reports and verifying cache rules. Most managed CDN platforms emit at least one of these by default; absence often means the platform's diagnostic headers are stripped at an upstream proxy.
B
Operational Status Page
No status page link detected
REVIEW
No status page link detected
Info::
No operational status page link detected
Status pages communicate planned maintenance and incidents to users -- a hallmark of operationally-mature services. Most SaaS teams publish one via Atlassian Statuspage, Instatus, BetterUptime, or a self-hosted Cachet. Smaller sites legitimately don't need one; flagged as Info, not a failure.
B
Health Check Endpoint
No conventional health endpoint found
REVIEW
No conventional health endpoint found
Info::
No conventional health endpoint found
Health endpoints (/health, /healthz, /status, /ping, /api/health) let uptime monitors, load balancers, and orchestration systems (Kubernetes, ECS, Fly.io) verify the service is alive. Marketing sites and small services often skip them legitimately; flagged as Info, not a failure. Probe results: /api/health: connection error, /health: connection error, /healthz: connection error, /ping: connection error, /status: connection error.
A+
DNS Records
1 A records, 3 ms lookup
PASS
1 A records, 3 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 2.22.44.172
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
8 nameserver(s) configured
Got: asia3.akam.net, ns1-118.akam.net, eur2.akam.net, ns1-119.akam.net, eur1.akam.net, use1.akam.net, usc2.akam.net, usw2.akam.net
Info::
2 mail exchanger(s) configured
Info::
SPF record present in TXT
Info::
DNS resolution time: 3 ms
Got: 3 ms
A2.22.44.172
AAAA—
CNAME—
NSasia3.akam.net, ns1-118.akam.net, eur2.akam.net, ns1-119.akam.net, eur1.akam.net, use1.akam.net, usc2.akam.net, usw2.akam.net
MX
10 mxa-002a6b01.gslb.pphosted.com
10 mxb-002a6b01.gslb.pphosted.com
TXT
SPF v=spf1 ip4:198.22.123.0/24 ip4:168.94.230.0/24 ip4:198.22.122.4 ip4:198.22.122.6...
d365mktkey=4aspdiy55hf9qe6u9i7kg67n1
shopify-verification-code=D2rnbVaTP8FoOEL9qmvldwvq6sLwMX
_globalsign-domain-verification=E4YIjaa32WEGqA47Dm0jdFThhcAH_eakVg4sP0hwYj
_wrigrwh3deyxponfw7cjri8usbysbwu
d365mktkey=6orxxh8leit5lzxd0abqnuuqe
_globalsign-domain-verification=zohml7OMpOYBgZSep8H4TwrXwEEyxdtmxOmjWh0Dvb
liveramp-site-verification=BCRY5T_vpgZw0uDfS90iCAyU1c5pqGNVx5l2PaDnXH8
_globalsign-domain-verification=p9Qai1DIi4fFkvfsen_nMkaGokY-5QSLW1qyHhWxVF
adobe-idp-site-verification=525758772c073f6d5fdcd1854e6caf8bd27517827a81eafb9c04...
atlassian-domain-verification=TtUwVlR0K3KZx5O4wjw626rEZ0jNSaWcym1iHnu3MI3N72lPEm...
d365mktkey=2ud6jfzvcdaomybdz7yvh8pwx
Dynatrace-site-verification=882011e0-9bd0-40d2-822f-f85f661d2095__bbfqnfh72ema7g...
Dynatrace-site-verification=d39123ba-6007-4678-9099-bab300e4cc4d__b1g36mt3t36i7o...
d365mktkey=2qemjncqsww30ft64gp4gyg7g
docker-verification=6e02b058-6a9b-4bd6-b2ff-19d7b53ec244
d365mktkey=2xfbovrpbth5b74ebygf1lnoq
DlUfs9zx61nM1yUbnSP+ZzoX8CvEbKiZw6FRCqveTF8fDYmLIOR2LfzMYaXuit+sLpBYYV4QrRRFoUSV...
google-site-verification=s1KAsSED_OW5FMoqEkTv7d5Vl6IjwQbhNFAkBqtykiQ
docusign=c36307b9-2820-4415-92d1-ca4faea5aac3
Dynatrace-site-verification=7ddbc628-a14e-4777-9382-1c465da01cbe__cerg0381k2nnur...
_globalsign-domain-verification=FPaCAb-qc1XQOp3g21zvMhYe5Kqf5_oFrOTNv2bvdP
_globalsign-domain-verification=OuhJ-18jU_ZoR0fywqNBLK0TA5KlUlb7k3G_I6zGn8
_globalsign-domain-verification=kOdr8YXX373IW1gr_Of8-4bZONLkNzH_mTPCWGQ-sW
v=verifydomain MS=ms22146670
onetrust-domain-verification=b709621cb21a441a9906ac5fe67acf4f
docusign=c614af81-8967-4e75-837d-cecfdcd2c879
confluent-verification=c6f05e07-472d-4c33-85a6-8fbaf2c089a7
_globalsign-domain-verification=WlIRFk9I6Bf84ZXoznfQPiEFxSqvhCwi_u5ZK-dZkM
mk-org-sso-465501ed-efb7-4bdd-a703-dc485ceab414
_globalsign-domain-verification=-Dnz9-l2YuDUGF6pkxiEAV2dZD8vCAw1vjyXgf4X5f
bestbuy.com
globalsign-domain-verification=eypMAkwo9EOFdpks_S48knXiSq036prCa_TIc0JYYR
_globalsign-domain-verification=c17wKbxTHRlX9guWhH5pvY8jYFvxnFjwQSZ1H2U6qo
CAALookup not available with standard resolver
Resolved in 3 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A+
Multi-Resolver DNS Speed
Mean 23ms across 3 resolvers (spread 10ms)
PASS
Mean 23ms across 3 resolvers (spread 10ms)
Info::
Cloudflare: 17ms
Got: 17ms via 1.1.1.1:53
Info::
Quad9: 25ms
Got: 25ms via 9.9.9.9:53
Info::
Google: 27ms
Got: 27ms via 8.8.8.8:53
A+
Redirect Chain
0 redirect(s), 85 ms total
PASS
0 redirect(s), 85 ms total

https://bestbuy.com

85 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://bestbuy.com30185 msHTTP/1.1
A
Crawlability
no robots.txt, sitemap with 76 URLs
PASS
no robots.txt, sitemap with 76 URLs
Info::
No robots.txt found
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 76 entries
Info::
Sitemap index with 76 child sitemaps

robots.txt is optional but recommended. It tells search engine crawlers which pages to index.

Why this matters

No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.

Learn more ▾

A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.

Source: robotstxt.org

robots.txt No robots.txt found

No robots.txt found

This is fine for most sites — a missing robots.txt allows all crawling by default.

sitemap.xml 200 OK
Type Sitemap Index URLs 76 entries Valid XML Yes
Child Sitemaps:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

https://www.bestbuy.com/
200https://bestbuy.com/

HTTP → HTTPS

301http://bestbuy.com/ → https://bestbuy.com/

Consistent

A+
Domain Intelligence
bestbuy.com — via MarkMonitor Inc., 32 years, 8 months old, hosted on Akamai
PASS
bestbuy.com — via MarkMonitor Inc., 32 years, 8 months old, hosted on Akamai
Info::
Domain registered until Mar 4, 2028 (1 years, 9 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: MarkMonitor 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: Akamai
Got: AS16625
Domain expiry

629 days

March 4, 2028

SSL certificate

245 days

Issued by DigiCert Inc

Domain age

32 years, 8 months

Registered March 3, 1994

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Akamai

ASN AS16625

2.22.44.172

Registrar

MarkMonitor Inc.

Unlocked 8 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 MarkMonitor Inc.
Created March 3, 1994 (32 years, 8 months ago)
Expires March 4, 2028 (1 years, 9 months)
Last Updated January 31, 2026
Name Servers asia3.akam.net, eur1.akam.net, eur2.akam.net, ns1-118.akam.net, ns1-119.akam.net, usc2.akam.net, use1.akam.net, usw2.akam.net
DNSSEC Not enabled
Hosting
IP Address 2.22.44.172
ASN AS16625 (AKAMAI-AS - Akamai Technologies, Inc., US)
Provider Akamai
Data source: rdap (0.2s)

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 162 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
29 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
24 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
54 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
163 ms
Total Time Total request time from DNS lookup through full response.
163 ms

Connection waterfall

DNS Lookup 29 ms TCP Connect 24 ms TLS Handshake 54 ms Server Processing 55 ms Content Transfer 0 ms
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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