Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DHTTP Probe TimingActionTotal 2387 ms — DNS, TCP, TLS, TTFB, content transfer breakdownFIX
Connection waterfall
DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
BDNS Records4 A records, 24 ms lookupREVIEW
| A | 151.101.193.55, 151.101.1.55, 151.101.65.55, 151.101.129.55 |
| AAAA | 2a04:4e42::311, 2a04:4e42:200::311, 2a04:4e42:600::311, 2a04:4e42:400::311 |
| CNAME | www-nikkei-com.n8s.jp |
| NS | — |
| MX | — |
| TXT | — |
| CAA | Lookup not available with standard resolver |
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.
Learn more ▾ ▴
RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.
Source: RFC 1034
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.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
BTLS Certificate Expiry & Recommendations283 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
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
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+Redirect ChainNo redirects — direct accessPASS
https://www.nikkei.com
1695 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://www.nikkei.com | 200 | 1695 ms | HTTP/1.1 |
A+IPv6 ReadinessIPv6 reachable (1 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 2 URLsPASS
User-agent: *
Allow: /markets/kabu/stkcomp/$
Allow: /markets/kabu/gyoshucomp/$
Disallow: /.tools
Disallow: /markets/kabu/stkcomp/
Disallow: /markets/kabu/gyoshucomp/
Disallow: /.resources/k-components/rtoaster/
# If you want to use our data in machine learning, please contact us from the following url.
# ja: https://nkbb.nikkei.co.jp/article/
# en: https://nkbb.nikkei.co.jp/en/dataset/nikkei-news-articles
User-agent: CCBot
Disallow: /
User-agent: GPTBot
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: Google-Extended
Disallow: /
User-agent: anthropic-ai
Disallow: /
User-agent: cohere-ai
Disallow: /
User-Agent: omgili
Disallow: /
User-Agent: omgilibot
Disallow: /
User-Agent: ICC-Crawler
Disallow: /
User-agent: Applebot-Extended
Disallow: /
User-agent: ClaudeBot
Disallow: /
User-agent: Claude-Web
Disallow: /
User-agent: Claude-SearchBot
Disallow: /
User-agent: Claude-User
Disallow: /
User-agent: PerplexityBot
Disallow: /
User-agent: Perplexity-ai
Disallow: /
User-agent: Perplexity-User
Disallow: /
User-agent: Bytespider
Disallow: /
User-agent: Diffbot
Disallow: /
User-agent: FacebookBot
Disallow: /
User-agent: OAI-SearchBot
Disallow: /
User-agent: MJ12bot
Disallow: /
User-agent: PiplBot
Disallow: /
User-agent: Meta-ExternalAgent
Disallow: /
User-agent: Timpibot
Disallow: /
User-agent: Webzio
Disallow: /
User-agent: Webzio-extended
Disallow: /
User-agent: AmazonBot
Disallow: /
User-agent: cohere-training-data-crawler
Disallow: /
User-agent: magpie-crawler
Disallow: /
User-agent: meta-externalfetcher
Disallow: /
User-agent: Scrapy
Disallow: /
User-agent: DuckAssistBot
Disallow: /
User-agent: Google-CloudVertexBot
Disallow: /
User-agent: AI2Bot
Disallow: /
User-agent: AI2Bot-Dolma
Disallow: /
User-agent: img2dataset
Disallow: /
User-agent: YouBot
Disallow: /
User-agent: SeekrBot
Disallow: /
User-agent: OpenindexSpider
Disallow: /
User-agent: Gensparkbot
Disallow: /
User-agent: SBIntuitionsBot
Disallow: /
User-agent: SBIntuitions-SearchBot
Disallow: /
Sitemap: https://www.nikkei.com/sitemap.xml
Sitemap: https://www.nikkei.com/sitemaps/topics_sitemap_index.xml
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: www
HTTP → HTTPS
Consistent
ADomain Intelligencenikkei.com — via Japan Registry Services Co., Ltd., 31 years, 4 months oldPASS
EXPIRED
May 10, 2026
283 days
Issued by GlobalSign nv-sa
31 years, 4 months
Registered May 9, 1995
Not enabled
Protects against DNS spoofing
Unknown
2600:9000:a615:e7f2:2ea1:cf50:5844:399f
Japan Registry Services Co., Ltd.
Expiry timeline
Recommended actions
- Domain has EXPIRED — renew immediately to avoid total site outage
- Enable DNSSEC to protect visitors from DNS spoofing
Consider enabling auto-renewal to prevent accidental expiration.
Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.
Source: ICANN renewal policy
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