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.
BRedirect Chain1 redirect(s), 1001 ms totalREVIEW
https://nrc.nl
503 ms · HTTP/1.1
https://www.nrc.nl/
498 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://nrc.nl | 301 | 503 ms | HTTP/1.1 | nginx |
| 2 | https://www.nrc.nl/ | 200 | 498 ms | HTTP/1.1 | nginx |
See the visual redirect chain in the HTTP Probe tab →
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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations343 days until leaf cert expires — 2 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records1 A records, 10 ms lookupPASS
| A | 46.22.183.139 |
| AAAA | — |
| CNAME | — |
| NS | eva.ns.cloudflare.com, phil.ns.cloudflare.com |
| MX | 10 nrc-nl.mail.protection.outlook.com |
| TXT | MS=ms21743690 _zyp6z2rhzgp7elsb4mu4b489p2k0mx7 blitz=mu-b6144c2e-429acc50-9f761b0f-4187a6ac google-gws-recovery-domain-verification=53127880 1password-site-verification=N7FXCOWMXZFRLCBGGY5SJMVFQQ facebook-domain-verification=zssl5avhcj1uut9k2c1dr5yjr7oydv google-site-verification=3ZR4f0Ewcn9YB64nwdtKwRPP1H_NQzEqVLyi4laDnLQ google-site-verification=GSppHa0q0UbE00OOKtUrywm-EgHI2obFZAALSgeYNXc google-site-verification=N_4G16QG--24SkIiXKjdhWCIg-HNJWw1KllU0CoWRhM google-site-verification=ikgVoGAKV4DKqx-ng7ZzhrPX08Y3p7hX2M1EFV2UsWk apple-domain-verification=iDCKm6RneFM_me_nD9O5JCwJ_JzQxda8m_k2oSwQjQY bQnS/PGTwj7QNUp8O3XSqNNcRMiaFEaicDl6zvqyKjqOLzutoRXYkYTzU4oiktZqJur/uY9b5EgA2IYp... adobe-idp-site-verification=2874515d68b0370803179f9e8d6698cb503e00756499a6e7a042... atlassian-domain-verification=lMLcQEH8BbDfXWN11OfWNm2Jk19vskfLinI0rLNnVQ9gZEtb9a... SPF v=spf1 include:spf.protection.outlook.com include:spf.messagelabs.com ip4:185.43... |
| 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.
A+Crawlabilityrobots.txt present, sitemap with 16 URLsPASS
# All copyrights, neighbouring rights and database rights in the content and
# layout of this website/app are explicitly reserved and are for personal,
# non-commercial use only. In accordance with Article 4 of the Directive on
# Copyright in the Digital Single Market (CDSM) and its transposition into
# the law of the applicable Member State, all content of this website on
# which it is made available is not to be used for the purposes of text and
# data mining, extraction, scraping and/or the use of programs or robots for
# automatic data collection and/or extraction of digital data, whether for
# machine learning or artificial intelligence purposes or otherwise. See
# also the Terms and Conditions of this website.
User-agent: *
Disallow: /*/appview
Disallow: /*/data/related$
Disallow: /api/wordproof/
Disallow: /data/
Disallow: /de/data/s3/
Disallow: /nieuwsbrieven/preview/
Disallow: /paywall-api/
Disallow: /preview/
Disallow: /search/
User-agent: magpie-crawler
Disallow: /
# https://github.com/ai-robots-txt/ai.robots.txt/blob/main/robots.txt
# I excluded:
# - Applebot as that is also used for Apple News.
# - Some facebook user-agents that are required for threads/facebook.
User-agent: AI2Bot
User-agent: Ai2Bot-Dolma
User-agent: aiHitBot
User-agent: Amazonbot
User-agent: Andibot
User-agent: anthropic-ai
# User-agent: Applebot
User-agent: Applebot-Extended
User-agent: Awario
User-agent: bedrockbot
User-agent: Brightbot 1.0
User-agent: Bytespider
User-agent: CCBot
User-agent: ChatGPT-User
User-agent: Claude-SearchBot
User-agent: Claude-User
User-agent: Claude-Web
User-agent: ClaudeBot
User-agent: cohere-ai
User-agent: cohere-training-data-crawler
User-agent: Cotoyogi
User-agent: Crawlspace
User-agent: Datenbank Crawler
User-agent: Devin
User-agent: Diffbot
User-agent: DuckAssistBot
User-agent: Echobot Bot
User-agent: EchoboxBot
# User-agent: FacebookBot
# User-agent: facebookexternalhit
User-agent: Factset_spyderbot
User-agent: FirecrawlAgent
User-agent: FriendlyCrawler
User-agent: Gemini-Deep-Research
User-agent: Google-CloudVertexBot
User-agent: Google-Extended
User-agent: GoogleAgent-Mariner
User-agent: GoogleOther
User-agent: GoogleOther-Image
User-agent: GoogleOther-Video
User-agent: GPTBot
User-agent: iaskspider/2.0
User-agent: ICC-Crawler
User-agent: ImagesiftBot
User-agent: img2dataset
User-agent: ISSCyberRiskCrawler
User-agent: Kangaroo Bot
User-agent: meta-externalagent
User-agent: Meta-ExternalAgent
# User-agent: meta-externalfetcher
# User-agent: Meta-ExternalFetcher
User-agent: MistralAI-User
User-agent: MistralAI-User/1.0
User-agent: MyCentralAIScraperBot
User-agent: netEstate Imprint Crawler
User-agent: NovaAct
User-agent: OAI-SearchBot
User-agent: omgili
User-agent: omgilibot
User-agent: Operator
User-agent: PanguBot
User-agent: Panscient
User-agent: panscient.com
User-agent: Perplexity-User
User-agent: PerplexityBot
User-agent: PetalBot
User-agent: PhindBot
User-agent: Poseidon Research Crawler
User-agent: QualifiedBot
User-agent: QuillBot
User-agent: quillbot.com
User-agent: SBIntuitionsBot
User-agent: Scrapy
User-agent: SemrushBot-OCOB
User-agent: SemrushBot-SWA
User-agent: Sidetrade indexer bot
User-agent: SummalyBot
User-agent: Thinkbot
User-agent: TikTokSpider
User-agent: Timpibot
User-agent: VelenPublicWebCrawler
User-agent: WARDBot
User-agent: Webzio-Extended
User-agent: wpbot
User-agent: YandexAdditional
User-agent: YandexAdditionalBot
User-agent: YouBot
Disallow: /
Sitemap: https://www.nrc.nl/sitemap/index.xml
- https://www.nrc.nl/sitemap/2026-4.xml
- https://www.nrc.nl/sitemap/2026-3.xml
- https://www.nrc.nl/sitemap/2026-2.xml
- https://www.nrc.nl/sitemap/2026-1.xml
- https://www.nrc.nl/sitemap/2025-12.xml
- https://www.nrc.nl/sitemap/2025-11.xml
- https://www.nrc.nl/sitemap/2025-10.xml
- https://www.nrc.nl/sitemap/2025-9.xml
- https://www.nrc.nl/sitemap/2025-8.xml
- https://www.nrc.nl/sitemap/2025-7.xml
- https://www.nrc.nl/sitemap/2025-6.xml
- https://www.nrc.nl/sitemap/2025-5.xml
- https://www.nrc.nl/sitemap/2025-4.xml
- https://www.nrc.nl/sitemap/vanity-pages....
- https://www.nrc.nl/sitemap/topics.xml
- https://www.nrc.nl/sitemap/sections.xml
A+Domain Intelligencenrc.nl — via team.blue nl B.V., 32 years, 7 months old, hosted on NL-INTERMAX Intermax Cloudsourcing B.V., NLPASS
Unknown
343 days
Issued by Sectigo Limited
32 years, 7 months
Registered February 9, 1994
Enabled
Protects against DNS spoofing
NL-INTERMAX Intermax Cloudsourcing B.V., NL
ASN AS24586
46.22.183.139
team.blue nl B.V.
Expiry timeline
Recommended actions
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
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