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https://issuu.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
200 OK
Checks
9
6 PASS 3 REVIEW
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
Domain Intelligence
issuu.com — via GoDaddy.com, LLC, 19 years, 3 months old, hosted on Fastly
REVIEW
issuu.com — via GoDaddy.com, LLC, 19 years, 3 months old, hosted on Fastly
Critical::
Domain expires in 2 days
This domain expires on April 19, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.
Got: Expires Apr 19, 2026
Info::
DNSSEC is enabled
Info::
Registrar: GoDaddy.com, LLC
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: Fastly
Got: AS54113
Domain expiry

EXPIRED

April 19, 2026

SSL certificate

171 days

Issued by GlobalSign nv-sa

Domain age

19 years, 3 months

Registered April 19, 2007

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.193.55

Registrar

GoDaddy.com, LLC

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 registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar GoDaddy.com, LLC
Created April 19, 2007 (19 years, 3 months ago)
Expires April 19, 2026 (2 days)
Last Updated October 10, 2024
Name Servers ns-1343.awsdns-39.org, ns-1582.awsdns-05.co.uk, ns-426.awsdns-53.com, ns-757.awsdns-30.net
DNSSEC Enabled
Hosting
IP Address 151.101.193.55
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: rdap (0.3s)

This domain expires on April 19, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

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

B
TLS Certificate Expiry & Recommendations
171 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

171
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 OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
4 A records, 75 ms lookup
PASS
4 A records, 75 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 151.101.1.55, 151.101.65.55, 151.101.193.55, 151.101.129.55
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-426.awsdns-53.com, ns-1343.awsdns-39.org, ns-757.awsdns-30.net, ns-1582.awsdns-05.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: 75 ms
Got: 75 ms
A151.101.1.55, 151.101.65.55, 151.101.193.55, 151.101.129.55
AAAA—
CNAME—
NSns-426.awsdns-53.com, ns-1343.awsdns-39.org, ns-757.awsdns-30.net, ns-1582.awsdns-05.co.uk
MX
10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 alt2.aspmx.l.google.com
40 aspmx2.googlemail.com
50 aspmx3.googlemail.com
TXT
google-site-verification=JO5hAUdeQB6RbQhV-_AKYyv6xfJnmVKuTkYtkZYhcLk
google-site-verification=GBizRM9Z_p17clZXSQMnJjIdyXLjCoDJY6aYG-kbwnQ
atlassian-domain-verification=+SyUybAN4ilkkpHjnTS9UW9fhbIiAlFXshc97OU0IZw+UHVP0I...
mixpanel-domain-verify=3d34b526-2c05-4de4-a475-bdc5b58f49c8
MS=ms41162561
google-site-verification=3yHgeX--mAcr74szFR5gTbIbD1TkraSFdZS_xIm9jMY
google-site-verification=c6Hy78bVIo4EsMFlp02T8dC2rg_2s2kqhDdVkSQcNFQ
TAILSCALE-QTxUnggBiedjypLchTwB
facebook-domain-verification=rfrx5vjx0elz3n83h0ydr94nlkptkr
apple-domain-verification=ElKeVvlCb1VtMkhI
fastly-domain-delegation-00331056-2025326
google-site-verification=xh0flAgyOL5F8z5FQTMUnk4Z0nYehx9lPsDq1d2ntFY
google-site-verification=p_DY5uxkB0uAYklg-sR0Lii2bYnF6ZooXcw2Eyi4rL8
miro-verification=50d48af206c43d8ba6a5c568d0b68365b08fd197
google-site-verification=5CyB-vqN7byHfN1pa3hf-FFj_ecJbkgBJ7iJr3nso98
docusign=828dd772-5bf2-4d4a-9956-c6b07049c55b
google-site-verification=0H3HL1KxMhfdap89AcuCKadjU2QFxgZ0I7CXePAEReE
SPF v=spf1 include:mail.zendesk.com include:_spf.sparkpostmail.com include:_spf.go...
rippling-domain-verification=217697edd61756fc
CAALookup not available with standard resolver
Resolved in 75 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
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://issuu.com

https://issuu.com

123 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://issuu.com200123 msHTTP/1.1
A+
Crawlability
robots.txt present, sitemap with 3 URLs
PASS
robots.txt present, sitemap with 3 URLs
Info::
robots.txt is present
Got: 5973 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3 entries
Info::
Sitemap index with 3 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 5973 B Sitemaps referenced 20 User-agents harsilbot, Qwantify, SeobilityBot, webgains-bot, DotBot, MJ12bot, SemrushBot-OCOB, AwarioBot, BLEXBot, Clickagy Intelligence Bot, OpenWebSpider, PetalBot, Screaming Frog SEO Spider, SeekportBot, SemrushBot-BA, CheckLinks, nooze-bot, RankFlex, Rogerbot, SearchmetricsBot, SEO-Checker-bot, SeoSiteCheckup, trendictionbot, AwarioSmartBot, FindLinks, getlinkinfo.com, linkCheck, Morningscore Bot, SiteAuditBot, YaK, AddSearchBot, DataForSeoBot, MBCrawler, OpenindexSpider, Qwantify-prod, SEOdiver Bot, SEOkicks-Robot, SEOstats, cocolyzebot, DomainStatsBot, HubSpot Crawler, SeekrBot, www.deadlinkchecker.com, LinkWalker, *, AwarioRssBot, BomboraBot Blocking No — crawling allowed


User-agent: AddSearchBot
Disallow: /
User-agent: AwarioBot
Disallow: /
User-agent: AwarioRssBot
Disallow: /
User-agent: AwarioSmartBot
Disallow: /
User-agent: BLEXBot
Disallow: /
User-agent: BomboraBot
Disallow: /
User-agent: CheckLinks
Disallow: /
User-agent: Clickagy Intelligence Bot
Disallow: /
User-agent: cocolyzebot
Disallow: /
User-agent: DataForSeoBot
Disallow: /
User-agent: DomainStatsBot
Disallow: /
User-agent: DotBot
Disallow: /
User-agent: FindLinks
Disallow: /
User-agent: getlinkinfo.com
Disallow: /
User-agent: harsilbot
Disallow: /
User-agent: HubSpot Crawler
Disallow: /
User-agent: linkCheck
Disallow: /
User-agent: LinkWalker
Disallow: /
User-agent: MBCrawler
Disallow: /
User-agent: MJ12bot
Disallow: /
User-agent: Morningscore Bot
Disallow: /
User-agent: nooze-bot
Disallow: /
User-agent: OpenindexSpider
Disallow: /
User-agent: OpenWebSpider
Disallow: /
User-agent: PetalBot
Disallow: /
User-agent: Qwantify
Disallow: /
User-agent: Qwantify-prod
Disallow: /
User-agent: RankFlex
Disallow: /
User-agent: Rogerbot
Disallow: /
User-agent: Screaming Frog SEO Spider
Disallow: /
User-agent: SearchmetricsBot
Disallow: /
User-agent: SeekportBot
Disallow: /
User-agent: SeekrBot
Disallow: /
User-agent: SemrushBot-BA
Disallow: /
User-agent: SemrushBot-OCOB
Disallow: /
User-agent: SEO-Checker-bot
Disallow: /
User-agent: SeobilityBot
Disallow: /
User-agent: SeoSiteCheckup
Disallow: /
User-agent: SEOdiver Bot
Disallow: /
User-agent: SEOkicks-Robot
Disallow: /
User-agent: SEOstats
Disallow: /
User-agent: SiteAuditBot
Disallow: /
User-agent: trendictionbot
Disallow: /
User-agent: webgains-bot
Disallow: /
User-agent: www.deadlinkchecker.com
Disallow: /
User-agent: YaK
Disallow: /

User-agent: *
Disallow: /home$
Disallow: /home/
Disallow: /home?
Disallow: /mylibrary$
Disallow: /mylibrary/
Disallow: /mylibrary?
Disallow: /publish$
Disallow: /publish/
Disallow: /publish?
Disallow: /user/settings
Disallow: /user/upload
Disallow: /sections$
Disallow: /sections/
Disallow: /sections?
Disallow: /business/signup
Disallow: /embed/guide
Disallow: /oembed/
Disallow: /oembed?
Disallow: /oembed_wp/
Disallow: /oembed_wp?
Disallow: /oembed_tumblr/
Disallow: /oembed_tumblr?
Disallow: /prv/originalfile
Disallow: /flag/document
Disallow: /flag/profile
Disallow: /action$
Disallow: /action/
Disallow: /action?
Disallow: /api/
Disallow: /students/
Allow: /call/notifier/friendly/get
Allow: /call/document-page/stream/
Allow: /call/stream/
Allow: /call/profile/
Allow: /query?*action=issuu.documents.list_anonymous&
Allow: /query?*action=issuu.documents.list_anonymous$
Allow: /query?*action=issuu.stacks.list_anonymous&
Allow: /query?*action=issuu.stacks.list_anonymous$
Allow: /query?*action=issuu.user.list_subscribers&
Allow: /query?*action=issuu.user.list_subscribers$
Disallow: /call/
Disallow: /res/
Disallow: /cwv/
Disallow: /query$
Disallow: /query%
Disallow: /query?
Disallow: /query/
Disallow: /try$
Disallow: /try%
Disallow: /try?
Disallow: /try/
Disallow: /prices$
Disallow: /prices%
Disallow: /prices?
Disallow: /prices/
Disallow: /query%
Disallow: /query?
Disallow: /query/
Disallow: /signup/payment
Disallow: /signup/payment%
Disallow: /signup/payment?
Disallow: /signup/payment/
Disallow: /signup/onboarding
Disallow: /signup/onboarding%
Disallow: /signup/onboarding?
Disallow: /signup/onboarding/
Disallow: /signup?
Disallow: /signin?
Disallow: /forgotpassword?
Disallow: /sso-signin?
Disallow: /logout
Disallow: /preview/result
Disallow: /preview/result?
Disallow: /preview/result%
Disallow: /preview/result?
Disallow: /preview/result/
Disallow: /search?

Disallow: /lp/thank-you-reader$
Disallow: /lp/thank-you-reader%
Disallow: /lp/thank-you-reader?
Disallow: /lp/thank-you-reader/

Disallow: /offers/referral-terms-conditions$
Disallow: /offers/referral-terms-conditions%
Disallow: /offers/referral-terms-conditions?
Disallow: /offers/referral-terms-conditions/

Disallow: /go/menu$
Disallow: /go/menu%
Disallow: /go/menu?
Disallow: /go/menu/

Disallow: /go/realty$
Disallow: /go/realty%
Disallow: /go/realty?
Disallow: /go/realty/

Disallow: /acq/nonprofits$
Disallow: /acq/nonprofits%
Disallow: /acq/nonprofits?
Disallow: /acq/nonprofits/

Disallow: /offers/nonprofits$
Disallow: /offers/nonprofits%
Disallow: /offers/nonprofits?
Disallow: /offers/nonprofits/

Disallow: /go/parks$
Disallow: /go/parks%
Disallow: /go/parks?
Disallow: /go/parks/

Disallow: /acq/real-estate$
Disallow: /acq/real-estate%
Disallow: /acq/real-estate?
Disallow: /acq/real-estate/

Disallow: /acq/parks-and-recreation$
Disallow: /acq/parks-and-recreation%
Disallow: /acq/parks-and-recreation?
Disallow: /acq/parks-and-recreation/


Sitemap: https://issuu.com/sitemap.xml
Sitemap: https://issuu.com/explore-sitemap.xml
Sitemap: https://issuu.com/categories-sitemap.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-deu.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-por.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-fra.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-spa.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-eng.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-other.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-ind.xml
Sitemap: https://issuu.com/sitemap/segmented/index-document-ita.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-ind.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-spa.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-por.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-deu.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-ita.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-eng.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-fra.xml
Sitemap: https://issuu.com/sitemap/segmented/index-article_story-other.xml
Sitemap: https://issuu.com/sitemap/segmented/index-user.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 3 entries Valid XML Yes
Child Sitemaps:
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.issuu.com/
200https://issuu.com/

Preferred variant: non-www

HTTP → HTTPS

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

Consistent

A+
HTTP Probe Timing
Total 158 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.
2 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
154 ms
Total Time Total request time from DNS lookup through full response.
159 ms

Connection waterfall

DNS Lookup 28 ms TCP Connect 1 ms TLS Handshake 2 ms Server Processing 123 ms Content Transfer 5 ms
A
CDN & Delivery
Fastly (MISS, MISS)
PASS
Fastly (MISS, MISS)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-iad-kiad7000148-IAD, cache-toj-leto2350032-TOJ
Info::
CDN cache status: MISS, MISS
CDN Detected: Fastly
Provider Fastly Cache Status MISS, MISS Evidence x-served-by: cache-iad-kiad7000148-IAD, cache-toj-leto2350032-TOJ
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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