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https://denverpost.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
1
REVIEW
5
PASS
3
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
3 PASS 5 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
Redirect Chain
1 redirect(s), 2241 ms total
REVIEW
1 redirect(s), 2241 ms total
Info::
Single redirect
Got: https://denverpost.com → https://www.denverpost.com/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 2241 ms total
Got: 2241 ms

https://denverpost.com

6 ms · HTTP/1.1

301

https://www.denverpost.com/

2236 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://denverpost.com3016 msHTTP/1.1nginx
2https://www.denverpost.com/2002236 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.denverpost.com/
200https://denverpost.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

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

Consistent

B
HTTP Probe Timing
Total 1036 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
36 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
0 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
3 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.04 s
Total Time Total request time from DNS lookup through full response.
1.04 s

Connection waterfall

DNS Lookup 36 ms TCP Connect 0 ms TLS Handshake 3 ms Server Processing 996 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
40 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

40
days left
0d 30d 60d 90d+

Recommended actions

  • 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+
DNS Records
1 A records, 87 ms lookup
PASS
1 A records, 87 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 192.0.66.2
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1019.awsdns-63.net, ns-1220.awsdns-24.org, ns-503.awsdns-62.com, ns-1679.awsdns-17.co.uk
Info::
5 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 87 ms
Got: 87 ms
A192.0.66.2
AAAA—
CNAME—
NSns-1019.awsdns-63.net, ns-1220.awsdns-24.org, ns-503.awsdns-62.com, ns-1679.awsdns-17.co.uk
MX
10 aspmx.l.google.com
20 alt2.aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 aspmx3.googlemail.com
30 aspmx2.googlemail.com
TXT
1lhc1bmucsjp7q8b91t87nhm01.
_globalsign-domain-verification=SGSNuVFXgku36Q1g39h5zCWUAutWLDNr2xISH37_-n
MS=ms42763989
aslt820givt06ua5qjmkutdm4b
3mmibbsavpv6o2hkq39uqhsr49
globalsign-domain-verification=wdsjy5b1d3sGjlpf2ZSfdpjPcsNrXC_iOKH4GEnR0_
7bsbnac1nf7c1tfrv8c7gamjrf
_globalsign-domain-verification=nx5U56FiDUqhsckpguh1BWVo8oJVRsFtwCfGxdBN4e
knowbe4-site-verification=a9ce6449edf2d51c41eed1f3517d26f9
4pj8eagm2vmptskd6g1hk0gm5t
tollbit-domain-verification=d3cc43d6a25115e73321be2cb765b25a1cc2c7ec945ec934dde6...
_globalsign-domain-verification=B57sRQpmte4G4w-gavZbVNmmNsMxGp5kcL19UP2599
MS=63BE0B5C6D28D2CE1C330D9F740E9E25038D5DB2
_globalsign-domain-verification=qu9bswx7_efyr0AnoYMkd0ZmvFdZNxur1nGSq55P5P
bw=o2AhWgmJR//LI2rv8ZuBaKChD0Ub6rd1lZ53Dg9MG4fp
_globalsign-domain-verification=0TyIZcbLmgSwoVohQ9GWaLbZq22eAkpviTlcN7JXo3
facebook-domain-verification=1yiyurr8k1l0cfwvgyjk5w823lm9ua
_globalsign-domain-verification=_OUsAbDOaFYPYWOgAjdN9k-kV76av1Rf5Pg4XHx3dL
e3fltk8am78ee4uept7hiqftu0
ega5pobqtumor93gg1fighan98
k0710qvbmi4c1pu6fp5fpvq3h
specops-verification-code=700c2dff-5af8-4409-a777-25df1fb770e6
sl4nmnrb1rno4slakgbovshcs0
1lhc1bmucsjp7q8b91t87nhm01
google-site-verification=2bKNvyyGh6DUlOvH1PYsmKN4KRlb-0ZI7TvFtuKLeAc
00D6A000000u2db=1TBRP00000001SL
SPF v=spf1 include:_spf.google.com include:_spf.salesforce.com include:_spf.mnginter...
google-site-verification=d2473NFa5jCbg_yQ0m3ZZyA4fO_q5Bnt7C2XNlx9JRk
IP26DG603F9M48358IST7R5L3I
llib6qvjasng0m5c7562bvdl78
google-site-verification=f0YC07m4ehdn8TAFlPwmgd6cUL2ne-J8HSQ4XjVwXzk
36ailchom7s11o20nu6uqgo69o
_globalsign-domain-verification=gctAD22GIK3YS4qVlothF9J8N9P35BDNYtltbRXnnM
CAALookup not available with standard resolver
Resolved in 87 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

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Crawlability
robots.txt present, sitemap with 8864 URLs
PASS
robots.txt present, sitemap with 8864 URLs
Info::
robots.txt is present
Got: 4244 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 8864 entries
Info::
Sitemap index with 8864 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 4244 B Sitemaps referenced 1 User-agents ICC-Crawler, SBIntuitionsBot, VelenPublicWebCrawler, Google-Extended, GPTBot, Kangaroo Bot, Thinkbot, AmazonAdBot, Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA51N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Mobile Safari/537.36 (compatible; mrfCompass-Booldog/1.0), Ai2Bot-Dolma, DocSpotBot, LCC, Meta-ExternalAgent, OAI-SearchBot, Twitterbot, *, ChatGPT-User, ClaudeBot, PerplexityBot, Mozilla/5.0 (compatible; EchoboxBot/1.0; hash/w4mwnpbXf3MFAbxOkJRw; +http://www.echobox.com), AI2Bot, Amazonbot, Claude-User, Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA51N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Mobile Safari/537.36 (compatible; mrfCompass-Jukebox/1.0), Applebot-Extended, Bytespider, Claude-Searchbot, Datenbank Crawler, PetalBot, Timpibot, Vivaldi, GnowitNewsbot, Mantisbot, omgili, grok-crawler, DuckAssistBot, FacebookBot, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36(KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 (compatible; mrfCompass-Booldog/1.0), Cohere-training-data-crawler, MistralAI-User, YandexBot, Archive.org_bot, carbon-umbrella-bot, CCBot, Claude-Web, netEstate Imprint Crawler, Dalvik, PanguBot, facebookexternalhit, laion-huggingface-processor, Perplexity-User, Webzio-extended, Mozilla/5.0 (compatible; NewsRoom.BI/0.1; +http://www.newsroom.bi/bot.html), Cotoyogi, imageSpider, Spider, grapeshot, Baiduspider, SirdataBot, Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; mrfCompass-Marshall/1.0), anthropic-ai, Brightbot 1.0, Diffbot, ia_archiver-web.archive.org Blocking No — crawling allowed
# Our Content is made available for your personal, non-commercial use subject to our Terms of Service here: https://www.medianewsgroup.com/terms-of-use/
# Any other uses are prohibited, including but not limited to:
# (1) text and data mining activities under Art. 4 of the EU Directive on Copyright in the Digital Single Market;
# (2) use of any Content or information available on the Site for purposes of retrieval augmented generation, grounding, training, or development of machine learning models, algorithms, or artificial intelligence (AI) systems, or to generate substitute content or develop any products, services, or technology;
# (3) caching or archiving the Content; and/or
# (4) any commercial purposes.
# Contact us at https://www.denverpost.com/contact-us/ for assistance.

User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php
Disallow: /cgi-bin/
Disallow: /wp-includes/
Disallow: /xmlrpc.php
Disallow: /wp-content/plugins/
Disallow: /wp-content/cache/
Disallow: /trackback/
Disallow: /comments/

User-agent: AI2Bot
Disallow: /

User-agent: Ai2Bot-Dolma
Disallow: /

User-agent: Amazonbot
Disallow: /

User-agent: anthropic-ai
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Archive.org_bot
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: Brightbot 1.0
Disallow: /

User-Agent: Bytespider
Disallow: /

User-agent: carbon-umbrella-bot
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ChatGPT-User
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Claude-Searchbot
Disallow: /

User-agent: Claude-User
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: Cohere-training-data-crawler
Disallow: /

User-agent: Cotoyogi
Disallow: /

User-agent: Dalvik
Disallow: /

User-agent: Datenbank Crawler
Disallow: /

User-agent: Diffbot
Disallow: /

User-agent: DocSpotBot
Disallow: /

User-agent: DuckAssistBot
Disallow: /

User-agent: FacebookBot
Disallow: /

User-agent: GnowitNewsbot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: grok-crawler
Disallow: /

User-agent: ia_archiver-web.archive.org
Disallow: /

User-agent: ICC-Crawler
Disallow: /

User-agent: imageSpider
Disallow: /

User-agent: Kangaroo Bot
Disallow: /

User-agent: laion-huggingface-processor
Disallow: /

User-agent: LCC
Disallow: /

User-agent: Mantisbot
Disallow: /

User-agent: Meta-ExternalAgent
Disallow: /

User-agent: MistralAI-User
Disallow: /

User-agent: netEstate Imprint Crawler
Disallow: /

User-agent: OAI-SearchBot
Disallow: /

User-agent: omgili
Disallow: /

User-agent: PanguBot
Disallow: /

User-agent: PerplexityBot
Disallow: /

User-agent: Perplexity-User
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: SBIntuitionsBot
Disallow: /

User-agent: SirdataBot
Disallow: /

User-agent: Spider
Disallow: /

User-agent: Thinkbot
Disallow: /

User-agent: Timpibot
Disallow: /

User-agent: VelenPublicWebCrawler
Disallow: /

User-agent: Vivaldi
Disallow: /

User-agent: Webzio-extended
Disallow: /

User-agent: YandexBot
Disallow: /

User-agent: AmazonAdBot
Disallow:

User-agent: facebookexternalhit
Disallow:

User-agent: grapeshot
Disallow:

User-agent: Mozilla/5.0 (compatible; EchoboxBot/1.0; hash/w4mwnpbXf3MFAbxOkJRw; +http://www.echobox.com)
Disallow:

User-agent: Twitterbot
Disallow:

User-agent: Mozilla/5.0 (compatible; NewsRoom.BI/0.1; +http://www.newsroom.bi/bot.html)
Allow: /
User-agent: Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA51N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Mobile Safari/537.36 (compatible; mrfCompass-Booldog/1.0)
Allow: /
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36(KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 (compatible; mrfCompass-Booldog/1.0)
Allow: /
User-agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; mrfCompass-Marshall/1.0)
Allow: /
User-agent: Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA51N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Mobile Safari/537.36 (compatible; mrfCompass-Jukebox/1.0)
Allow: /
# Sitemap archive
Sitemap: https://www.denverpost.com/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 8864 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
denverpost.com — via CSC Corporate Domains, Inc., 31 years, 6 months old, hosted on WordPress.com (Automattic)
PASS
denverpost.com — via CSC Corporate Domains, Inc., 31 years, 6 months old, hosted on WordPress.com (Automattic)
Info::
Domain registered until Mar 11, 2027 (10 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: CSC Corporate Domains, 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: WordPress.com (Automattic)
Got: AS2635
Domain expiry

270 days

March 11, 2027

SSL certificate

40 days

Issued by Let's Encrypt

Domain age

31 years, 6 months

Registered March 10, 1995

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

WordPress.com (Automattic)

ASN AS2635

192.0.66.2

Registrar

CSC Corporate Domains, Inc.

Unlocked 4 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 CSC Corporate Domains, Inc.
Created March 10, 1995 (31 years, 6 months ago)
Expires March 11, 2027 (10 months)
Last Updated April 6, 2026
Name Servers ns-1019.awsdns-63.net, ns-1220.awsdns-24.org, ns-1679.awsdns-17.co.uk, ns-503.awsdns-62.com
DNSSEC Not enabled
Hosting
IP Address 192.0.66.2
ASN AS2635 (AUTOMATTIC - Automattic, Inc, US)
Provider WordPress.com (Automattic)
Data source: rdap (0.3s)

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

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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