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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Santa Clara, United States
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
URL Variants
Action
www/non-www, trailing slash, HTTP→HTTPS
FIX
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
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 403 Expected: 301 redirect to HTTPS

www / non-www

200https://www.nbc.com/
200https://nbc.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

403http://nbc.com/

HTTP version does not redirect to HTTPS

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
TLS Certificate Expiry & Recommendations
42 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

42
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • 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
B
CDN & Delivery
Akamai
REVIEW
Akamai
Info::
Site is served via Akamai CDN
Got: server header
CDN Detected: Akamai
Provider Akamai Evidence server header
A+
DNS Records
2 A records, 8 ms lookup
PASS
2 A records, 8 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 23.44.229.205, 23.44.229.217
Info::
No IPv6 (AAAA) records
Info::
6 nameserver(s) configured
Got: a16-65.akam.net, a2-64.akam.net, a7-66.akam.net, a1-196.akam.net, a13-66.akam.net, a22-64.akam.net
Info::
4 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: 8 ms
Got: 8 ms
A23.44.229.205, 23.44.229.217
AAAA
CNAME
NSa16-65.akam.net, a2-64.akam.net, a7-66.akam.net, a1-196.akam.net, a13-66.akam.net, a22-64.akam.net
MX
10 mxb-00176a04.gslb.pphosted.com
10 mxa-00176a04.gslb.pphosted.com
20 mx0a-00176a04.pphosted.com
20 mx0b-00176a04.pphosted.com
TXT
_ndyg416yahogevwlm0ic5nygguvju1k
google-site-verification=g-qMWSt-zMMBUvOnxoKpZMYB3jGYvjhM3yB8Y8S3bSI
v=DMARC1; p=none; fo=1; rua=mailto:nbcdmarc@leanplum.com;ruf=mailto:nbcdmarc@lea...
adobe-idp-site-verification=d266b426130588069c9d5b76db345b36532058a66f36380fe985...
google-site-verification=2HGzrNBjTm0TMAyT8psrvan75ZAlVTk7w6b32zTfyZA
apple-domain-verification=9QkhxNWX7RdCNXHH
atlassian-domain-verification=hnOZC9WrGJKmk3t83oojZWEloANSWU2MnvQDVGqe6laUY0fpn5...
SPF v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
_0hvq3mj8ey9btfivongdsjg6w3h8c2o
google-site-verification=7cupNx2PaD4wrzsatdYeSL5i_h9_ZFrSYg7QXn_F0kM
google-site-verification=xykurxD47PJxoK-w3FIi0n-0X5VfqO23pOjqVSKZLh0
amazonses:nrQBHklCs2OPiiTmnS3ISGeWKvTa4/zdzxdbRZYbFWY=
MS=ms45776050
_z3odyixzmzrqpj9dpt4iaa531wybjt9
google-site-verification=gPUHl1w8jD2X6YgbA_ddBcWeX7HGX0jFoh1c63dyxw0
CAALookup not available with standard resolver
Resolved in 8 ms

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
Redirect Chain
1 redirect(s), 88 ms total
PASS
1 redirect(s), 88 ms total
Info::
Single redirect
Got: https://nbc.com → https://www.nbc.com/ (301)
Info::
WWW normalization redirect

https://nbc.com

40 ms · HTTP/1.1

301

https://www.nbc.com/

49 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://nbc.com30140 msHTTP/1.1AkamaiGHost
2https://www.nbc.com/20049 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 31319 URLs
PASS
robots.txt present, sitemap with 31319 URLs
Info::
robots.txt is present
Got: 6732 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 31319 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 6732 B Sitemaps referenced 6 User-agents * Blocking No — crawling allowed
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html



User-agent: *
# Directories
Disallow: */includes/
Disallow: */misc/
Disallow: */modules/
Disallow: */profiles/
Disallow: */scripts/
Disallow: */themes/
Disallow: */internaluseronly/
# Files
Disallow: */CHANGELOG.txt
Disallow: */cron.php
Disallow: */INSTALL.mysql.txt
Disallow: */INSTALL.pgsql.txt
Disallow: */INSTALL.sqlite.txt
Disallow: */install.php
Disallow: */INSTALL.txt
Disallow: */LICENSE.txt
Disallow: */MAINTAINERS.txt
Disallow: */update.php
Disallow: */UPGRADE.txt
Disallow: */xmlrpc.php
# Paths (clean URLs)
Disallow: */admin/
Disallow: */comment/reply/
Disallow: */content/
Disallow: */file/
Disallow: */filter/tips/
Disallow: */node/
Disallow: */search
Disallow: */user/register/
Disallow: */user/password/
Disallow: */user/login/
Disallow: */user/logout/
# Paths (no clean URLs)
Disallow: */?q=admin/
Disallow: */?q=comment/reply/
Disallow: */?q=content/
Disallow: */?q=file/
Disallow: */?q=filter/tips/
Disallow: */?q=node/
Disallow: */?q=search/
Disallow: */?q=user/password/
Disallow: */?q=user/register/
Disallow: */?q=user/login/
Disallow: */?q=user/logout/

Disallow: */classic-tv/*
Disallow: */nightly-news/*
Disallow: */nightly-news/*
Disallow: */the-tonight-show/guest/*
Disallow: *one-app-preview*

# Disallow users paths
Disallow: /users*

# USA - Shows
Disallow: /the-biggest-loser*
Disallow: /temptation-island*
Disallow: /chrisley-knows-best*
Disallow: /wwe-raw*
Disallow: /miz-mrs*
Disallow: /growing-up-chrisley*
Disallow: /the-cromarties*
Disallow: /american-ninja-warrior-ninja-vs-ninja*
Disallow: /wwe-smackdown*
Disallow: /suits*
Disallow: /ncis-los-angeles*
Disallow: /beverly-hills-dog-show*
Disallow: /according-to-chrisley*
Disallow: /real-country*
Disallow: /the-sinner*
Disallow: /playing-house*
Disallow: /big-star-little-star*
Disallow: /inside-the-fbi-new-york*
Disallow: /the-radkes*
Disallow: /the-secret-life-of-kids*
Disallow: /queen-of-the-south*
Disallow: /motive*
Disallow: /eyewitness*
Disallow: /ncis*
Disallow: /how-low-will-you-go-*
Disallow: /pearson*
Disallow: /mr-robot*
Disallow: /what-s-cooking-with-julie-chrisley*
Disallow: /the-purge*
Disallow: /straight-up-steve-austin*
Disallow: /wwe-nxt*
Disallow: /treadstone*
Disallow: /dare-me*
Disallow: /briarpatch*
Disallow: /dirty-john*
Disallow: /cannonball*

# USA - Movies
Disallow: /marvel-s-avengers-age-of-ultron*
Disallow: /harry-potter-and-the-goblet-of-fire*
Disallow: /bridesmaids*
Disallow: /harry-potter-and-the-prisoner-of-azkaban*
Disallow: /fantastic-beasts-and-where-to-find-them*
Disallow: /harry-potter-and-the-deathly-hallows-part-1*
Disallow: /harry-potter-and-the-chamber-of-secrets*
Disallow: /harry-potter-and-the-deathly-hallows-part-2*
Disallow: /harry-potter-and-the-half-blood-prince*
Disallow: /wedding-crashers*
Disallow: /harry-potter-and-the-order-of-the-phoenix*
Disallow: /harry-potter-and-the-sorcerer-s-stone*
Disallow: /remember-the-titans*
Disallow: /fifty-shades-of-grey*
Disallow: /psych-the-movie*
Disallow: /brians-song*
Disallow: /our-kind-of-traitor*
Disallow: /everly*
Disallow: /ant-man*
Disallow: /fifty-shades-darker*
Disallow: /the-magnificent-seven*
Disallow: /boo-a-madea-halloween*
Disallow: /wizarding-world*
Disallow: /legally-blonde-2-red-white-and-blonde*
Disallow: /the-fast-and-the-furious-tokyo-drift*
Disallow: /captain-america-the-winter-soldier*
Disallow: /wanted*
Disallow: /red*
Disallow: /red-2*
Disallow: /san-andreas*
Disallow: /the-fast-and-the-furious*
Disallow: /fast-five*
Disallow: /2-fast-2-furious*
Disallow: /xxx-the-return-of-xander-cage*
Disallow: /madea-s-family-reunion*
Disallow: /madea-s-big-happy-family*
Disallow: /a-madea-christmas*
Disallow: /power-rangers*
Disallow: /that-awkward-moment*
Disallow: /silver-linings-playbook*
Disallow: /killing-them-softly*
Disallow: /the-hitman-s-bodyguard*
Disallow: /mandrake*
Disallow: /enough*
Disallow: /obsessed*
Disallow: /million-dollar-arm*
Disallow: /kill-switch*
Disallow: /the-twilight-saga-breaking-dawn-part-1*
Disallow: /twilight*
Disallow: /dirty-dancing-havana-nights*
Disallow: /the-twilight-saga-new-moon*
Disallow: /the-twilight-saga-eclipse*
Disallow: /the-twilight-saga-breaking-dawn-part-2*
Disallow: /la-la-land*
Disallow: /dear-john*
Disallow: /dirty-dancing*
Disallow: /pitch-black*
Disallow: /doctor-strange*
Disallow: /knocked-up*
Disallow: /the-whole-truth*
Disallow: /next-friday*
Disallow: /friday-after-next*
Disallow: /friday*
Disallow: /bad-boys*
Disallow: /bad-boys-ii*
Disallow: /the-perfect-match*
Disallow: /the-replacements*
Disallow: /it-s-complicated*
Disallow: /abduction*
Disallow: /extraction*
Disallow: /begin-again*
Disallow: /the-wedding-planner*
Disallow: /21-jump-street*
Disallow: /empire-state*
Disallow: /the-hangover*
Disallow: /seattle-superstorm*
Disallow: /fast-furious*
Disallow: /easy-a*
Disallow: /percy-jackson-the-olympians-the-lightning-thief*
Disallow: /john-wick*
Disallow: /john-wick-chapter-2*
Disallow: /what-to-expect-when-you-re-expecting*
Disallow: /boo-2-a-madea-halloween*
Disallow: /fifty-shades-freed*
Disallow: /tomb-raider*
Disallow: /law-abiding-citizen*
Disallow: /exposed*
Disallow: /speed*
Disallow: /a-knight-s-tale*
Disallow: /hitch*
Disallow: /the-holiday*
Disallow: /definitely-maybe*
Disallow: /never-been-kissed*
Disallow: /kingdom-of-heaven*
Disallow: /knowing*
Disallow: /drive-angry*
Disallow: /the-bourne-identity*
Disallow: /american-sniper*
Disallow: /the-bourne-supremacy*
Disallow: /the-bourne-ultimatum*
Disallow: /a-league-of-their-own*
Disallow: /sydney-white*
Disallow: /rush-hour*
Disallow: /rush-hour-2*
Disallow: /rush-hour-3*
Disallow: /death-wish*
Disallow: /angels-demons*
Disallow: /the-da-vinci-code*
Disallow: /forgetting-sarah-marshall*
Disallow: /inferno*
Disallow: /little-fockers*
Disallow: /shrek*
Disallow: /transporter-3*
Disallow: /walking-tall*
Disallow: /hook*

# Sitemap details.
Sitemap: https://www.nbc.com/sitemap.xml
Sitemap: https://www.nbc.com/nbc-insider/sitemap.xml
Sitemap: https://www.nbc.com/nbc-insider/sitemaps/sitemap_blog/sitemap.xml
Sitemap: https://www.nbc.com/nbc-insider/sitemaps/googlenews/sitemap.xml
Sitemap: https://www.nbc.com/video_sitemap.xml
# Sitemap for the Google PlayGuide.
Sitemap: https://api.nbc.com/googlePlayGuide/feed.json

A+
Domain Intelligence
nbc.com — via MarkMonitor Inc., 29 years, 3 months old, hosted on Akamai
PASS
nbc.com — via MarkMonitor Inc., 29 years, 3 months old, hosted on Akamai
Info::
Domain registered until Jun 16, 2027 (1 years, 2 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: MarkMonitor 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: Akamai
Got: AS20940
Domain expiry

334 days

June 16, 2027

SSL certificate

42 days

Issued by DigiCert Inc

Domain age

29 years, 3 months

Registered June 17, 1997

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Akamai

ASN AS20940

23.44.229.217

Registrar

MarkMonitor Inc.

Unlocked 6 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 MarkMonitor Inc.
Created June 17, 1997 (29 years, 3 months ago)
Expires June 16, 2027 (1 years, 2 months)
Last Updated May 15, 2025
Name Servers a1-196.akam.net, a13-66.akam.net, a16-65.akam.net, a2-64.akam.net, a22-64.akam.net, a7-66.akam.net
DNSSEC Not enabled
Hosting
IP Address 23.44.229.217
ASN AS20940 (AKAMAI-ASN1, NL)
Provider Akamai
Data source: rdap (0.1s)

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

A+
HTTP Probe Timing
Total 39 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
8 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
3 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
15 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
39 ms
Total Time Total request time from DNS lookup through full response.
39 ms

Connection waterfall

DNS Lookup 8 ms TCP Connect 3 ms TLS Handshake 15 ms Server Processing 13 ms Content Transfer 0 ms
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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