on24.com

Checked 22 October 2026, 10:05 UTC · via 8.8.8.8
!Passed with warnings
23 passed 4 warnings 0 failed 4 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2028-09-22

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
23 September 1998
Last changed
30 June 2026
Expires
22 September 2028
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
a1-97.akam.net, a12-67.akam.net, a13-64.akam.net, a26-66.akam.net, a7-64.akam.net, a8-67.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 2028-09-22 #3
    The registration is valid until 2028-09-22 (700 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

a1-97.akam.net, a12-67.akam.net, a13-64.akam.net, a26-66.akam.net, a7-64.akam.net, a8-67.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-97.akam.net, a12-67.akam.net, a13-64.akam.net, a26-66.akam.net, a7-64.akam.net, a8-67.akam.net
NS in the zone
a1-97.akam.net, a12-67.akam.net, a13-64.akam.net, a26-66.akam.net, a7-64.akam.net, a8-67.akam.net
NameserverAddressesNetwork (AS)Glue
a1-97.akam.net193.108.91.97 2600:1401:2::61AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-67.akam.net184.26.160.67 2600:1480:f000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-64.akam.net2.22.230.64 2600:1480:800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-66.akam.net23.74.25.66 2600:1480:b800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-64.akam.net23.61.199.64 2600:1406:32::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a8-67.akam.net2.16.40.67 2600:1403:a::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-97.akam.net, a12-67.akam.net, a13-64.akam.net, a26-66.akam.net, a7-64.akam.net, a8-67.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
a1-97.akam.net 193.108.91.97NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a1-97.akam.net 2600:1401:2::61NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a12-67.akam.net 184.26.160.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a12-67.akam.net 2600:1480:f000::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a13-64.akam.net 2.22.230.64NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a13-64.akam.net 2600:1480:800::40NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a26-66.akam.net 23.74.25.66NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a26-66.akam.net 2600:1480:b800::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a7-64.akam.net 23.61.199.64NOERROR, 3 ms, authoritativenoyes / yesrefused41824.4
a7-64.akam.net 2600:1406:32::40NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a8-67.akam.net 2.16.40.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.29
a8-67.akam.net 2600:1403:a::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33

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: a1-97.akam.net: "41824.11"; a1-97.akam.net: "41824.6"; a12-67.akam.net: "48878.32"; a12-67.akam.net: "48878.29"; a13-64.akam.net: "41824.5"; a13-64.akam.net: "41824.9"; a26-66.akam.net: "48878.31"; a7-64.akam.net: "41824.4"; a8-67.akam.net: "48878.29"; a8-67.akam.net: "48878.33". 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

warn

serial 2850253959 · primary dns4.on24.com

Found

Primary (MNAME)
dns4.on24.com
Contact (RNAME)
sysmgr.on24.com
Serial
2850253959
Refresh / retry
7200 s / 31104000 s
Expire
1209600 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
a1-97.akam.net (193.108.91.97)2850253959
a1-97.akam.net (2600:1401:2::61)2850253959
a12-67.akam.net (184.26.160.67)2850253959
a12-67.akam.net (2600:1480:f000::43)2850253959
a13-64.akam.net (2.22.230.64)2850253959
a13-64.akam.net (2600:1480:800::40)2850253959
a26-66.akam.net (23.74.25.66)2850253959
a26-66.akam.net (2600:1480:b800::42)2850253959
a7-64.akam.net (23.61.199.64)2850253959
a7-64.akam.net (2600:1406:32::40)2850253959
a8-67.akam.net (2.16.40.67)2850253959
a8-67.akam.net (2600:1403:a::43)2850253959

Checks

  • ✓ Serial 2850253959 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 360d should be shorter than refresh 2h; expire 14d must be longer than refresh + retry. Current values: refresh 2h, retry 360d, expire 14d, negative TTL 30m.
    #23
  • i
    Hidden master
    The primary nameserver dns4.on24.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact sysmgr@on24.com #25
    The SOA RNAME sysmgr.on24.com means sysmgr@on24.com.
  • ✓ Timestamp serial #26
    The serial 2850253959 is a Unix timestamp (2060-04-27 01:12 UTC).

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

17 records at the apex

Found

Read from
193.108.91.97:53
TypeValueTTL
SOAdns4.on24.com. sysmgr.on24.com. 2850253959 7200 31104000 1209600 1800600
NSa1-97.akam.net.600
NSa12-67.akam.net.600
NSa7-64.akam.net.600
NSa8-67.akam.net.600
NSa13-64.akam.net.600
NSa26-66.akam.net.600
A162.159.135.42600
MX10 mxa-0011dd01.gslb.pphosted.com.30
MX10 mxb-0011dd01.gslb.pphosted.com.30
TXT"MS=ms77760166"600
TXT"smartsheet-site-validation=rxAMWh8CcUu3bwApPkLHZ4cN8w2EyWsV"600
TXT"anthropic-domain-verification-azwd9c=Jsl03fNEFEFauIYcb6RyYNDiv"600
TXT"stripe-verification=84830C36EB1B7AAEABCCDFC9DDAB69C48A2BFB7117D7326450F2C886329ACA55"600
TXT"zoom-domain-verification=ZOOM_verify_5oKA15Ni8ZdLkTiginCqpf"600
TXT"box-domain-verification=8b4fe5c00b9ad34f2437a4a9de41e68ac630984a4c951348ea868529e002f5f9"600
TXT"v=spf1 ip4:199.83.44.0/22 include:spf.protection.outlook.com include:mktomail.com include:mail.zendesk.com -all"600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (30s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 10m; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • 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