Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BCrawlabilityno robots.txt, no sitemapREVIEW
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
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
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
No robots.txt found
This is fine for most sites — a missing robots.txt allows all crawling by default.
No sitemap found
Adding a sitemap helps search engines discover your pages.
BTLS Certificate Expiry & Recommendations184 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
- 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 Records1 A records, 60 ms lookupPASS
| A | 216.119.218.99 |
| AAAA | — |
| CNAME | — |
| NS | a9-64.akam.net, a1-29.akam.net, a7-67.akam.net, a18-64.akam.net, a22-65.akam.net, a26-66.akam.net |
| MX | 10 mxa-00078002.gslb.pphosted.com 10 mxb-00078002.gslb.pphosted.com |
| TXT | airtable-verification=ac800a6f44c17925f6bd32ea4aa44894 pardot163061=06ad0741f9d54ea5405da3cfa43f33b64e150ef5c57da443ad300ba004da645b google-site-verification=aFpgfHwpIB9wP8vy7ha7XlE_Ie5eniXNrVgTZvb0Y6s mongodb-site-verification=rZkQa6gUUHH4Mx4SosnfnglyvIp3rmYv postman-domain-verification=33b37ff3a7f216afc8364e6163ec691362aa75dcc1bf51f9711b... 8045-3EBB-B5FC-AEF3-14D1-AC67-1088-D900 openai-domain-verification=dv-AgiAbBY6ez5xnvM7ql1I50Rm mongodb-site-verification=t5k2LgdLxKWYVewBzPiEu0iTIGKtnlN2 apple-domain-verification=c6W1qeAHSo6DbwVc ec7f346604f518906d35ef0492709f78 google-gws-recovery-domain-verification=60378709 mixpanel-domain-verify=32a3f24d-1ab8-499e-be20-4d90a50e4d0e docker-verification=4b72827b-32c1-4fe6-a443-2856c0df9a51 google-site-verification=66zwLd8X_8K0nX8NNWXS_zlgqFq1pTfHid8vJzb3lB8 slack-domain-verification=6Tn0MeeJ5y2rwxsCOuttdyaIpBz3r1HG1xKeMDpI ms-domain-verification=d733cf48-b051-4ead-b1a4-60ea82523113 _globalsign-domain-verification=eRi2ZQZJ99fAou8jrSC06eUJpasrvj8YgWl21vaW5G smartsheet-site-validation=hqDNvixcpGGmDqgXw0IQAQzYiCUZ_NjY atlassian-domain-verification=CGO8tCXHtiZUBnTJh01TwMadn9aCwpHxamHZVPQBDTG3badn5k... atlassian-domain-verification=zXeHVyO9eWog3f6TQIfeFwk1hRniWa0Gylu2ONeHNtbc05S48q... onetrust-domain-verification=9faa54187b974ee6a08608d4858d8f7e google-site-verification=b1ZPa1IquEDz4Xb_3Nb0-UC4DsLRSanTmHZDGqBUiis 3a30be93eb45566a90f4e95ee72a089a SPF v=spf1 include:spf.protection.outlook.com include:deliverygateways.mastercard.co... Dynatrace-site-verification=1a474a54-75e8-40bb-8baf-a80cfdcedfe6__llctt109dvv9ba... smartsheet-site-validation=rgDcv0UCdWvo-ZFj5FTmmB7ZBXyPgh2E 56e6a93212e4482d99c84a639d254b67 fe9fc289c3ff0af142b6d3bead98a923 mongodb-site-verification=axmDkHlwAGvNsA17D8dPlsIOYgcqtrBz OPddTNoGXuP0t54rWgyL2LZjeyJYVhiX1O6Y5m5MTuOOhv4/1X+1ZwYUex9hKi8FmtIKfUPtvY04tYLh... postman-domain-verification=223f70ad07799f852fceadeac539231b4f3b9f6673f46886dee8... infoblox-domain-mastery=a79f9cd257e969fb72bb304523072b39bd50dfb6ea7d7f44d8dc7ec8... onetrust-domain-verification=a14180ed5e7144f2ba6d02ece082fbd9 atlassian-sending-domain-verification=ad83ad89-ec1d-40ee-b2f0-a352f055841f adobe-idp-site-verification=9a8affe9f40574b4522d548efd4c0838df83704137a4c4c09b28... google-site-verification=lwih4Ax7Rsyv46SAAckGGGpcxPy9tpc4bYfVt4vstsY facebook-domain-verification=u4nbx98zpaot2nhzhfju6z24xs6miv LXqzgspP+p6jZLtCY31SpgFiwCeGy0jFUtv9ju0S65d/MDpaaSokywn2o7CPf0935/d8auKgbI3wn1UE... oE1olhbq9xyXp2ohGw2F bw=4RHf8CdIg7RhxDQ1qZTUqTzyT+brk70yfwKP9yZ99jB6 ZOOM_verify_5iqN50tCRjWyMgQa3G__uQ Dynatrace-site-verification=5f211e2e-80de-4ed7-9853-54223730fd02__b3bscjmsb302fk... |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
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
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 874 ms totalPASS
https://mastercard.com
782 ms · HTTP/1.1
https://www.mastercard.com/
92 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://mastercard.com | 301 | 782 ms | HTTP/1.1 | |
| 2 | https://www.mastercard.com/ | 403 | 92 ms | HTTP/1.1 | AkamaiGHost |
See the visual redirect chain in the HTTP Probe tab →
AURL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
A+Domain Intelligencemastercard.com — via CSC Corporate Domains, Inc., 32 years, 2 months old, hosted on MASTER-7-AS - MasterCard Technologies LLC, USPASS
11 days
July 26, 2026
184 days
Issued by DigiCert Inc
32 years, 2 months
Registered July 27, 1994
Not enabled
Protects against DNS spoofing
MASTER-7-AS - MasterCard Technologies LLC, US
ASN AS26380
216.119.218.99
CSC Corporate Domains, Inc.
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
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.
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