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
BTLS Certificate Expiry & Recommendations135 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 Records2 A records, 92 ms lookupPASS
| A | 208.94.155.99, 66.150.1.229 |
| AAAA | — |
| CNAME | — |
| NS | ns-w21.southwest.com, ns-w11.southwest.com |
| MX | 10 mail02.wnco.com 10 outgoing.wnco.com |
| TXT | _4euyjhh2akthszptxyklufk2g4nm1jj identrust_validate=fXNA1Qb3CuyBMtCOpRZyaKbIaisaX1CBZMlJX+K8Q2KE SPF v=spf1 include:luv.southwest.com include:spf.messagelabs.com include:cmail1.com ... pardot886213=5f9176871506272b28c41f1ddffd6a99f50aae6f7c1540d03a7e4474746e820f facebook-domain-verification=5tg9b0fpw4l87zy4ga4hqxzrgjnbu7 tsktdktn7wq710fh3lqrrx391kfjwv0y apple-domain-verification=AVqb7df_lh4ZY0IFN-xHTHCQfzRorhFBV0YJIEi3dMk klaviyo-site-verification=TvuiSP identrust_validate=BvULH7j+tFTCcJxzas5YCHn9MFM82G99zGdJ3Nx7OIJy |
| CAA | Lookup not available with standard resolver |
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), 195 ms totalPASS
https://southwest.com
163 ms · HTTP/1.0
https://www.southwest.com/
32 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://southwest.com | 301 | 163 ms | HTTP/1.0 | BigIP |
| 2 | https://www.southwest.com/ | 200 | 32 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 172 URLsPASS
User-agent: *
Disallow: /v2/
Disallow: /sitemap-c360.xml
User-agent: AhrefsBot
Allow: /
User-agent: Screaming Frog SEO Spider
Allow: /
Sitemap: https://www.southwest.com/sitemap.xml
Sitemap: https://www.southwest.com/en/flights/sitemap_en.xml
Sitemap: https://espanol.southwest.com/sitemap.xml
Sitemap: https://mobile.southwest.com/sitemap.xml
Sitemap: https://www.investors.southwest.com/sitemap.xml
Sitemap: https://rapidrewardsshopping.southwest.com/sitemap.php
Sitemap: https://support.southwest.com/helpcenter/s/sitemap.xml
Sitemap: https://support.southwest.com/helpcenter/sfsites/c/resource/HelpCenter_Sitemap
AURL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
A+Domain Intelligencesouthwest.com — via MarkMonitor Inc., 29 years, 4 months old, hosted on SWA-W11-MKT-INET - Southwest Airlines Co., USPASS
320 days
May 2, 2027
135 days
Issued by IdenTrust
29 years, 4 months
Registered May 1, 1997
Not enabled
Protects against DNS spoofing
SWA-W11-MKT-INET - Southwest Airlines Co., US
ASN AS396173
66.150.1.229
MarkMonitor Inc.
Expiry timeline
Recommended actions
- 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