st.com

Checked 22 October 2026, 10:51 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-02-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
8 February 1993
Last changed
5 February 2026
Expires
9 February 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-23.akam.net, a2-66.akam.net, a28-66.akam.net, a5-64.akam.net, a8-66.akam.net, a9-65.akam.net, delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com
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 2027-02-09 #3
    The registration is valid until 2027-02-09 (109 days).
  • ✓ Transfer locked #4
    Registry status: client transfer 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

a1-23.akam.net, a2-66.akam.net, a28-66.akam.net, a5-64.akam.net, a8-66.akam.net, a9-65.akam.net, delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-23.akam.net, a2-66.akam.net, a28-66.akam.net, a5-64.akam.net, a8-66.akam.net, a9-65.akam.net, delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com
NS in the zone
a1-23.akam.net, a2-66.akam.net, a28-66.akam.net, a5-64.akam.net, a8-66.akam.net, a9-65.akam.net, delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com
NameserverAddressesNetwork (AS)Glue
a1-23.akam.net193.108.91.23 2600:1401:2::17AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-66.akam.net95.100.174.66 2600:1480:7000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-66.akam.net95.100.173.66 2600:1480:d800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-64.akam.net95.100.168.64 2600:1480:b000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a8-66.akam.net2.16.40.66 2600:1403:a::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-65.akam.net184.85.248.65 2a02:26f0:117::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
delta.dmz-ap.st.com138.198.100.37AS9466 UUNET-JP-AP - UUNET Japan Limited, JP138.198.100.37
delta.dmz-eu.st.com164.129.1.37AS2830 Verizon-dual-homed-customers - Verizon Nederland B.V., NL164.129.1.37
delta.dmz-us.st.com167.4.1.37AS7046 RFC2270-UUNET-CUSTOMER - Verizon Business, US167.4.1.37

Checks

  • ✓ 9 nameservers #6
    Delegated to a1-23.akam.net, a2-66.akam.net, a28-66.akam.net, a5-64.akam.net, a8-66.akam.net, a9-65.akam.net, delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com.
  • ✓ 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 9 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 12 addresses; AS2830 (Verizon-dual-homed-customers - Verizon Nederland B.V., NL): 1 address; AS7046 (RFC2270-UUNET-CUSTOMER - Verizon Business, US): 1 address; AS9466 (UUNET-JP-AP - UUNET Japan Limited, JP): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: delta.dmz-ap.st.com, delta.dmz-eu.st.com, delta.dmz-us.st.com.
    #13

Nameservers

warn

15 of 15 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-23.akam.net 193.108.91.23NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a1-23.akam.net 2600:1401:2::17NOERROR, 5 ms, authoritativenoyes / yesrefused41824.4
a2-66.akam.net 95.100.174.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a2-66.akam.net 2600:1480:7000::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.29
a28-66.akam.net 95.100.173.66NOERROR, 5 ms, authoritativenoyes / yesrefused48878.27
a28-66.akam.net 2600:1480:d800::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a5-64.akam.net 95.100.168.64NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a5-64.akam.net 2600:1480:b000::40NOERROR, 5 ms, authoritativenoyes / yesrefused41824.5
a8-66.akam.net 2.16.40.66NOERROR, 5 ms, authoritativenoyes / yesrefused48878.26
a8-66.akam.net 2600:1403:a::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.26
a9-65.akam.net 184.85.248.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a9-65.akam.net 2a02:26f0:117::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
delta.dmz-ap.st.com 138.198.100.37NOERROR, 242 ms, authoritativenoyes / yesrefused-
delta.dmz-eu.st.com 164.129.1.37NOERROR, 15 ms, authoritativenoyes / yesrefused-
delta.dmz-us.st.com 167.4.1.37NOERROR, 129 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 15 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: a1-23.akam.net: "41824.11"; a1-23.akam.net: "41824.4"; a2-66.akam.net: "48878.27"; a2-66.akam.net: "48878.29"; a28-66.akam.net: "48878.27"; a28-66.akam.net: "48878.31"; a5-64.akam.net: "41824.6"; a5-64.akam.net: "41824.5"; a8-66.akam.net: "48878.26"; a9-65.akam.net: "41824.4"; a9-65.akam.net: "41824.6". 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 2022053570 · primary delta.dmz-eu.st.com

Found

Primary (MNAME)
delta.dmz-eu.st.com
Contact (RNAME)
dnsmaster.st.com
Serial
2022053570
Refresh / retry
3600 s / 600 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
a1-23.akam.net (193.108.91.23)2022053570
a1-23.akam.net (2600:1401:2::17)2022053570
a2-66.akam.net (95.100.174.66)2022053570
a2-66.akam.net (2600:1480:7000::42)2022053570
a28-66.akam.net (95.100.173.66)2022053570
a28-66.akam.net (2600:1480:d800::42)2022053570
a5-64.akam.net (95.100.168.64)2022053570
a5-64.akam.net (2600:1480:b000::40)2022053570
a8-66.akam.net (2.16.40.66)2022053570
a8-66.akam.net (2600:1403:a::42)2022053570
a9-65.akam.net (184.85.248.65)2022053570
a9-65.akam.net (2a02:26f0:117::41)2022053570
delta.dmz-ap.st.com (138.198.100.37)2022053570
delta.dmz-eu.st.com (164.129.1.37)2022053570
delta.dmz-us.st.com (167.4.1.37)2022053570

Checks

  • ✓ Serial 2022053570 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 10m, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver delta.dmz-eu.st.com is one of the listed nameservers.
  • ✓ Contact dnsmaster@st.com #25
    The SOA RNAME dnsmaster.st.com means dnsmaster@st.com.
  • ✓ Timestamp serial #26
    The serial 2022053570 is a Unix timestamp (2034-01-28 09:32 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

info

24 records at the apex

Found

Read from
193.108.91.23:53
TypeValueTTL
SOAdelta.dmz-eu.st.com. dnsmaster.st.com. 2022053570 3600 600 2419200 36003600
NSa28-66.akam.net.86400
NSa1-23.akam.net.86400
NSa9-65.akam.net.86400
NSa8-66.akam.net.86400
NSa2-66.akam.net.86400
NSdelta.dmz-us.st.com.86400
NSdelta.dmz-eu.st.com.86400
NSdelta.dmz-ap.st.com.86400
NSa5-64.akam.net.86400
A54.194.135.493600
MX10 st-com.mail.protection.outlook.com.900
TXT"cisco-ci-domain-verification=25dd1b4722f650b8c8d7cb3beb39c348fc90005fbed666c7e559ff0f7306decc"3600
TXT"google-site-verification=_xBu4ex75D1HXaEgJtlOH4-KQbym0EEXrtLb6sfCQJU"3600
TXT"_globalsign-domain-verification=sbWhwwHtdnXMY_8oa_2AwroFfoc6imgOvFuDWHNoP0"3600
TXT"EL+b+HLOjUandS3GnT4aSMKKl+hEpYEba0apWnXH3FqPtQSOaZBda+ZakVW9rT05hN9wjSvzcUY3RfQemlAQ7g=="3600
TXT"atlassian-domain-verification=f3LTJ77zFUhFncMSteHljGP2BwYABw9ykWzPP08I7DFMy7gKAbOr7N5tc5SWGglC"3600
TXT"MS=ms59221250"3600
TXT"MS=ms37882190"3600
TXT"docusign=c2f9caa2-efaa-4684-8363-480aa8209a2f"3600
TXT"docker-verification=d6d198bc-8993-4f90-9414-e4febe3b4437"3600
TXT"docusign=175308d5-aa3a-4d76-a827-b74155ac8e32"3600
TXT"v=spf1 include:_spf.salesforce.com include:spf.protection.outlook.com -all"3600
TXT"jamf-site-verification=mhVEG7BGj0lb5RHeTvPwyw"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 15m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
  • ✓ 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