lucidchart.com

Checked 22 October 2026, 09:41 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-09-27

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
27 September 2008
Last changed
26 August 2026
Expires
27 September 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-179.akam.net, a11-64.akam.net, a20-65.akam.net, a22-67.akam.net, a28-67.akam.net, a7-65.akam.net
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2028-09-27 #3
    The registration is valid until 2028-09-27 (706 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

a1-179.akam.net, a11-64.akam.net, a20-65.akam.net, a22-67.akam.net, a28-67.akam.net, a7-65.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-179.akam.net, a11-64.akam.net, a20-65.akam.net, a22-67.akam.net, a28-67.akam.net, a7-65.akam.net
NS in the zone
a1-179.akam.net, a11-64.akam.net, a20-65.akam.net, a22-67.akam.net, a28-67.akam.net, a7-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-179.akam.net193.108.91.179 2600:1401:2::b3AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-64.akam.net84.53.139.64 2600:1480:1::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-65.akam.net95.100.175.65 2a02:26f0:67::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a22-67.akam.net23.211.61.67 2600:1480:7800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-67.akam.net95.100.173.67 2600:1480:d800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-65.akam.net23.61.199.65 2600:1406:32::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-179.akam.net, a11-64.akam.net, a20-65.akam.net, a22-67.akam.net, a28-67.akam.net, a7-65.akam.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 addresses.
  • i
    All nameserver names under .net
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-179.akam.net 193.108.91.179NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a1-179.akam.net 2600:1401:2::b3NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a11-64.akam.net 84.53.139.64NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a11-64.akam.net 2600:1480:1::40NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a20-65.akam.net 95.100.175.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a20-65.akam.net 2a02:26f0:67::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a22-67.akam.net 23.211.61.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a22-67.akam.net 2600:1480:7800::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a28-67.akam.net 95.100.173.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a28-67.akam.net 2600:1480:d800::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a7-65.akam.net 23.61.199.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a7-65.akam.net 2600:1406:32::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10

Checks

  • ✓ All respond #14
    All 12 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-179.akam.net: "41824.5"; a1-179.akam.net: "41824.6"; a11-64.akam.net: "41824.5"; a11-64.akam.net: "41824.9"; a20-65.akam.net: "48878.29"; a20-65.akam.net: "48878.33"; a22-67.akam.net: "48878.33"; a22-67.akam.net: "48878.31"; a28-67.akam.net: "48878.32"; a28-67.akam.net: "48878.30"; a7-65.akam.net: "41824.11"; a7-65.akam.net: "41824.10". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2024032222 · primary a1-179.akam.net

Found

Primary (MNAME)
a1-179.akam.net
Contact (RNAME)
hostmaster.lucidchart.com
Serial
2024032222
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-179.akam.net (193.108.91.179)2024032222
a1-179.akam.net (2600:1401:2::b3)2024032222
a11-64.akam.net (84.53.139.64)2024032222
a11-64.akam.net (2600:1480:1::40)2024032222
a20-65.akam.net (95.100.175.65)2024032222
a20-65.akam.net (2a02:26f0:67::41)2024032222
a22-67.akam.net (23.211.61.67)2024032222
a22-67.akam.net (2600:1480:7800::43)2024032222
a28-67.akam.net (95.100.173.67)2024032222
a28-67.akam.net (2600:1480:d800::43)2024032222
a7-65.akam.net (23.61.199.65)2024032222
a7-65.akam.net (2600:1406:32::41)2024032222

Checks

  • ✓ Serial 2024032222 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-179.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@lucidchart.com #25
    The SOA RNAME hostmaster.lucidchart.com means hostmaster@lucidchart.com.
  • ✓ Date-based serial #26
    The serial 2024032222 follows the YYYYMMDDnn convention (2024-03-22).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

warn

46 records at the apex

Found

Read from
193.108.91.179:53
TypeValueTTL
SOAa1-179.akam.net. hostmaster.lucidchart.com. 2024032222 3600 600 604800 30086400
NSa1-179.akam.net.86400
NSa11-64.akam.net.86400
NSa28-67.akam.net.86400
NSa20-65.akam.net.86400
NSa22-67.akam.net.86400
NSa7-65.akam.net.86400
A2.16.204.620
A2.16.204.1120
AAAA2a02:26f0:b700:4::210:cc5920
AAAA2a02:26f0:b700:4::210:cc6120
MX30 aspmx4.googlemail.com.60
MX10 aspmx.l.google.com.60
MX20 alt1.aspmx.l.google.com.60
MX30 aspmx5.googlemail.com.60
MX30 aspmx3.googlemail.com.60
MX30 aspmx2.googlemail.com.60
MX20 alt2.aspmx.l.google.com.60
TXT"yahoo-verification-key=ueA8y8kEUzx48Z1tuK/Za52eoCMAywy+TRKj4wHieDc="60
TXT"mgverify=c9152eb39612bfb7286206ccd2b02e09cf8956e9bdc97ab6f5b81d3f1c933d5c"60
TXT"google-site-verification=nKiX-_hY4FZ5O2zRcyIb49BCjWsNjYP22QCQdUBqOkE"60
TXT"atlassian-domain-verification=JaPS4qtw76eHX4aXsyon20x6oVivIhujWkn10DaEIEwNaivk71Re3KhnlrlIRmoL"60
TXT"google-site-verification=-fjgcgDkDSLj9mVoZhPwNG5sYzZYSac9lAVNjqSPQL0"60
TXT"google-site-verification=bmBtFUIhIvUJa5jziRck1t3v91dVOVxvk_TEMCZVWGo"60
TXT"adobe-idp-site-verification=0927b9cea77877f1be191cf53f1015a6b471e95081a4509d60ef17e30854b0e1"60
TXT"docusign=60a0a1d5-0c4a-46c4-94ea-bfae110b6314"60
TXT"anthropic-domain-verification-89b601=2FEWdE5ODvIBfwgOzXmlYdAwk"60
TXT"neat-pulse-domain-verification-lMWp2nN=1f81ab88-881e-484a-8da0-a04bcbd95a7f"60
TXT"smartsheet-site-validation=uaO3iMoDKLLmm984ZUSgO_XAVtz8VII_"60
TXT"google-site-verification=qjKa4dJYeZVYo3aoLQTYZ3TaxnGaYuGiVF1El3CwNkE"60
TXT"atlassian-domain-verification=k4c4OkLF3AxPA4uiBT/tZxg/HDQ8LskUPbC02k0UNcv6ubYpnRtnai/hjcLCTrr9"60
TXT"apple-domain-verification=OcX09kRUNjzAVAPP"60
TXT"v=spf1 include:_spf.google.com include:mail.zendesk.com include:mktomail.com include:spfa.cpmails.com ~all"60
TXT"drift-domain-verification=ffb18b9345b722c4d983a8ff69d8c52475a9589ffe1f625b5184c74d56955c67"60
TXT"onetrust-domain-verification=2cd5e78810ec4826b82d82cbbacb1c75"60
TXT"jamf-site-verification=KsjawaGA70PwVDRsP9esxQ"60
TXT"workplace-domain-verification=wadZrIc5RUGVVtHdroWFjkARmFAQpC"60
TXT"facebook-domain-verification=koae9h49ov13tnv486j0sm8o20vycl"60
TXT"cursor-domain-verification-c44vz3=kCxRMcBItOgfmObMCiTSvxyum"60
TXT"google-site-verification=M5q7HSJ_1Q-13H8ypifn7R__PVwOEVc78YFCf07mILE"60
TXT"openai-domain-verification=dv-cdsZoUOYzE6UbgO5Plbw7DFH"60
TXT"h1-domain-verification=dfffAChcfzqJFLNjekYtS9rmR4p8uPros2oLzmfarhUjycNt"60
TXT"626d5e3c-0152-45a9-83c1-fd00a2c991c7"60
TXT"cisco-ci-domain-verification=5125d2b0a970f29c36303872f9c50257285bbeb0153d60f898ab33b7a0bacb71"60
TXT"MS=ms62485468"60
TXT"calendly-site-verification=EW9MnHKlxVlaDJ4fW6Nb5Tc3SykcQiHb1ls4SmML4"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s), MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35