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https://nap.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
80
GRADE
B
FIX
2
REVIEW
4
PASS
3
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
3 PASS 4 REVIEW 2 FIX
D
Redirect Chain
Action
2 redirect(s), 2869 ms total
FIX
2 redirect(s), 2869 ms total
Warning::
2 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://nap.nationalacademies.org/
Warning::
Redirect overhead: 2869 ms total
Got: 2869 ms
Info::
Cross-domain redirect detected

https://nap.edu

944 ms · HTTP/1.1

301

https://nap.nationalacademies.org/

922 ms · HTTP/1.1

302

https://www.nationalacademies.org/public...

1004 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://nap.edu301944 msHTTP/1.1NAP
2https://nap.nationalacademies.org/302922 msHTTP/1.1NAP
3https://www.nationalacademies.org/public...2001004 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

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.

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
Crawlability
robots.txt present, no sitemap
REVIEW
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 1706 bytes
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more ▾

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 1706 B Sitemaps referenced 0 User-agents Charlotte, GPTBot, ClaudeBot, Baiduspider, CCBot, PerplexityBot, ChatGLM-Spider, *, bingbot, msnbot, Google-Extended, Claude-Web, Googlebot, ChatGPT-User, anthropic-ai, Bytespider Blocking No — crawling allowed
User-agent: *
Disallow: /pdf/
Disallow: /nap-cgi/
Disallow: /cart/
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/

User-agent: Baiduspider
Disallow: /pdf/
Disallow: /nap-cgi/
Disallow: /cart/
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/


User-agent: Googlebot 
Disallow: /pdf/
Disallow: /nap-cgi/
Disallow: /cart/
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/

User-agent: bingbot
Disallow: /pdf/
Disallow: /nap-cgi/
Disallow: /cart/
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/

User-agent: msnbot 
Disallow: /pdf/
Disallow: /nap-cgi/
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/

User-Agent: Charlotte
Disallow: /cart/ 
Disallow: /napsearch.php
Disallow: /booksearch.php
Disallow: /download.php
Disallow: /login.php
Disallow: /related.php
Disallow: /mynap.php
Disallow: /search/

User-agent: GPTBot
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: Google-Extended
Disallow: /
User-agent: CCBot
Disallow: /
User-agent: PerplexityBot
Disallow: /
User-agent: anthropic-ai
Disallow: /
User-agent: Claude-Web
Disallow: /
User-agent: ClaudeBot
Disallow: /
User-agent: ChatGLM-Spider
Disallow: /
User-agent: Bytespider
Disallow: /
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

B
HTTP Probe Timing
Total 955 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
9 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
236 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
474 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
955 ms
Total Time Total request time from DNS lookup through full response.
955 ms

Connection waterfall

DNS Lookup 9 ms TCP Connect 236 ms TLS Handshake 474 ms Server Processing 237 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
103 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

103
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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, 5 ms lookup
PASS
1 A records, 5 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 144.171.1.10
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
6 nameserver(s) configured
Got: a1-44.akam.net, a5-65.akam.net, a6-66.akam.net, a11-64.akam.net, a16-67.akam.net, a28-67.akam.net
Info::
1 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: 5 ms
Got: 5 ms
A144.171.1.10
AAAA—
CNAME—
NSa1-44.akam.net, a5-65.akam.net, a6-66.akam.net, a11-64.akam.net, a16-67.akam.net, a28-67.akam.net
MX
10 nas-edu.mail.protection.outlook.com
TXT
MS=ms42561113
SPF v=spf1 mx include:spf.protection.outlook.com -all
CAALookup not available with standard resolver
Resolved in 5 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+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.nap.edu/
200https://nap.edu/

Preferred variant: non-www

HTTP → HTTPS

301http://nap.edu/ → https://nap.edu/

Consistent

A+
Domain Intelligence
nap.edu — 30 years, 9 months old, hosted on NAS-AS - National Academy of Sciences, US
PASS
nap.edu — 30 years, 9 months old, hosted on NAS-AS - National Academy of Sciences, US
Info::
Domain registered until Jul 31, 2026 (3 months remaining)
Info::
Hosting: NAS-AS - National Academy of Sciences, US
Got: AS7301
Domain expiry

45 days

July 31, 2026

SSL certificate

103 days

Issued by DigiCert Inc

Domain age

30 years, 9 months

Registered December 11, 1995

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

NAS-AS - National Academy of Sciences, US

ASN AS7301

144.171.1.10

Registrar

Registrar unknown

Lock status unknown 6 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
Registrar
Created December 11, 1995 (30 years, 9 months ago)
Expires July 31, 2026 (3 months)
Last Updated July 2, 2025
Name Servers a16-67.akam.net, a5-65.akam.net, a6-66.akam.net, a1-44.akam.net, a11-64.akam.net, a28-67.akam.net
Registrant National Academy Press
Hosting
IP Address 144.171.1.10
ASN AS7301 (NAS-AS - National Academy of Sciences, US)
Provider NAS-AS - National Academy of Sciences, US
Data source: whois (1.5s)
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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