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https://addthis.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
92
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
B
Crawlability
no robots.txt, no sitemap
REVIEW
no robots.txt, no sitemap
Info::
No robots.txt found
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.

robots.txt is optional but recommended. It tells search engine crawlers which pages to index.

Why this matters

No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.

Learn more

A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.

Source: robotstxt.org

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

robots.txt No robots.txt found

No robots.txt found

This is fine for most sites — a missing robots.txt allows all crawling by default.

sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

B
TLS Certificate Expiry & Recommendations
125 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

125
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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, 32 ms lookup
PASS
2 A records, 32 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 95.100.86.196, 95.100.86.221
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a02:26f0:2380:19::17d3:f5e, 2a02:26f0:2380:19::17d3:f44
Info::
4 nameserver(s) configured
Got: a18-67.akam.net, a13-65.akam.net, a11-66.akam.net, a1-160.akam.net
Info::
2 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: 32 ms
Got: 32 ms
A95.100.86.196, 95.100.86.221
AAAA2a02:26f0:2380:19::17d3:f5e, 2a02:26f0:2380:19::17d3:f44
CNAME
NSa18-67.akam.net, a13-65.akam.net, a11-66.akam.net, a1-160.akam.net
MX
20 mxb-00069f01.gslb.pphosted.com
20 mxa-00069f01.gslb.pphosted.com
TXT
bzs3z25smxyylvxfjkr6vqmgp2tbgw42
SPF v=spf1 a mx include:_netblocks.addthis.com include:aspmx.pardot.com include:_net...
prz8n91rvkmbyl171kwgx2wvwxbt8sg4
_gx4rm5gnquvvvcpxwfpgkdvy4f0646y
globalsign-domain-verification=Wq9iztGUzQcBBi1OLrEOlXtefwOzX7yfvhbsw-CVdo
sj0v1trxt209h3xvhhjhky7jzb4ygxcy
pardot_92742_*=ec3c667bac55ced29c06395c567c68e2ddd44611bd74798e5c7ac890cc4c244a
CAALookup not available with standard resolver
Resolved in 32 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), 72 ms total
PASS
1 redirect(s), 72 ms total
Info::
Single redirect
Got: https://addthis.com → https://www.oracle.com/ (301)
Info::
WWW normalization redirect
Info::
Cross-domain redirect detected

https://addthis.com

8 ms · HTTP/1.1

301

https://www.oracle.com/

64 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://addthis.com3018 msHTTP/1.1AkamaiGHost
2https://www.oracle.com/40364 msHTTP/1.1AkamaiGHost

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a02:26f0:2380:19::17d3:f5e, 2a02:26f0:2380:19::17d3:f44
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a02:26f0:2380:19::17d3:f5e, 2a02:26f0:2380:19::17d3:f44 Connection Reachable (1 ms)
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.addthis.com/
200https://addthis.com/

Preferred variant: non-www

HTTP → HTTPS

301http://addthis.com/ https://www.oracle.com/

Consistent

A
Domain Intelligence
addthis.com — via MarkMonitor Inc., 28 years, 3 months old
PASS
addthis.com — via MarkMonitor Inc., 28 years, 3 months old
Warning::
Domain expires in 33 days
Consider enabling auto-renewal to prevent accidental expiration.
Got: Expires May 25, 2026
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.
Domain expiry

EXPIRED

May 25, 2026

SSL certificate

125 days

Issued by DigiCert Inc

Domain age

28 years, 3 months

Registered May 26, 1998

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a02:26f0:2380:19::17d3:f5e

Registrar

MarkMonitor Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Domain has EXPIRED — renew immediately to avoid total site outage
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar MarkMonitor Inc.
Created May 26, 1998 (28 years, 3 months ago)
Expires May 25, 2026 (1 months)
Last Updated April 23, 2025
Name Servers a1-160.akam.net, a11-66.akam.net, a13-65.akam.net, a18-67.akam.net
DNSSEC Not enabled
Hosting
IP Address 2a02:26f0:2380:19::17d3:f5e
Data source: rdap (0.2s)

Consider enabling auto-renewal to prevent accidental expiration.

Why this matters

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.

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 35 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
28 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
35 ms
Total Time Total request time from DNS lookup through full response.
36 ms

Connection waterfall

DNS Lookup 28 ms TCP Connect 1 ms TLS Handshake 4 ms Server Processing 2 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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