six-group.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
!Passed with warnings
30 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · InterNetX GmbH · expires 2027-04-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
InterNetX GmbH
Registered
10 April 2008
Last changed
19 August 2026
Expires
10 April 2027
Status
client transfer prohibited
Registry nameservers
a1-232.akam.net, a18-67.akam.net, a20-65.akam.net, a24-67.akam.net, a5-66.akam.net, ns1.six-group.com, ns2.six-group.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 2027-04-10 #3
    The registration is valid until 2027-04-10 (170 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

a1-232.akam.net, a18-67.akam.net, a20-65.akam.net, a24-67.akam.net, a5-66.akam.net, ns1.six-group.com, ns2.six-group.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-232.akam.net, a18-67.akam.net, a20-65.akam.net, a24-67.akam.net, a5-66.akam.net, ns1.six-group.com, ns2.six-group.com
NS in the zone
a1-232.akam.net, a18-67.akam.net, a20-65.akam.net, a24-67.akam.net, a5-66.akam.net, ns1.six-group.com, ns2.six-group.com
NameserverAddressesNetwork (AS)Glue
a1-232.akam.net193.108.91.232 2600:1401:2::e8AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a18-67.akam.net95.101.36.67 2600:1480:4800::43AS21342 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-
a24-67.akam.net2.16.130.67 2600:1480:9800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-66.akam.net95.100.168.66 2600:1480:b000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
ns1.six-group.com153.46.97.67AS9042 SIX - SIX Group Services AG, CH153.46.97.67
ns2.six-group.com153.46.105.67AS9042 SIX - SIX Group Services AG, CH153.46.105.67

Checks

  • ✓ 7 nameservers #6
    Delegated to a1-232.akam.net, a18-67.akam.net, a20-65.akam.net, a24-67.akam.net, a5-66.akam.net, ns1.six-group.com, ns2.six-group.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: ns1.six-group.com, ns2.six-group.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 7 IPv4 /24s and 5 IPv6 /48s.
  • ✓ 3 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): 9 addresses; AS9042 (SIX - SIX Group Services AG, CH): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.six-group.com, ns2.six-group.com.
    #13

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-232.akam.net 193.108.91.232NOERROR, 5 ms, authoritativenoyes / yesrefused41824.5
a1-232.akam.net 2600:1401:2::e8NOERROR, 5 ms, authoritativenoyes / yesrefused41824.11
a18-67.akam.net 95.101.36.67NOERROR, 5 ms, authoritativenoyes / yesrefused48878.30
a18-67.akam.net 2600:1480:4800::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a20-65.akam.net 95.100.175.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a20-65.akam.net 2a02:26f0:67::41NOERROR, 5 ms, authoritativenoyes / yesrefused48878.31
a24-67.akam.net 2.16.130.67NOERROR, 5 ms, authoritativenoyes / yesrefused48878.32
a24-67.akam.net 2600:1480:9800::43NOERROR, 6 ms, authoritativenoyes / yesrefused48878.31
a5-66.akam.net 95.100.168.66NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10
a5-66.akam.net 2600:1480:b000::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
ns1.six-group.com 153.46.97.67NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.six-group.com 153.46.105.67NOERROR, 11 ms, authoritativenoyes / yesrefused-

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: a1-232.akam.net: "41824.5"; a1-232.akam.net: "41824.11"; a18-67.akam.net: "48878.30"; a18-67.akam.net: "48878.31"; a20-65.akam.net: "48878.33"; a20-65.akam.net: "48878.31"; a24-67.akam.net: "48878.32"; a24-67.akam.net: "48878.31"; a5-66.akam.net: "41824.10"; a5-66.akam.net: "41824.5". 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 2012266444 · primary a1-232.akam.net

Found

Primary (MNAME)
a1-232.akam.net
Contact (RNAME)
dnsadmin.six-group.com
Serial
2012266444
Refresh / retry
3600 s / 360 s
Expire
2592000 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-232.akam.net (193.108.91.232)2012266444
a1-232.akam.net (2600:1401:2::e8)2012266444
a18-67.akam.net (95.101.36.67)2012266444
a18-67.akam.net (2600:1480:4800::43)2012266444
a20-65.akam.net (95.100.175.65)2012266444
a20-65.akam.net (2a02:26f0:67::41)2012266444
a24-67.akam.net (2.16.130.67)2012266444
a24-67.akam.net (2600:1480:9800::43)2012266444
a5-66.akam.net (95.100.168.66)2012266444
a5-66.akam.net (2600:1480:b000::42)2012266444
ns1.six-group.com (153.46.97.67)2012266444
ns2.six-group.com (153.46.105.67)2012266444

Checks

  • ✓ Serial 2012266444 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 6m, expire 30d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-232.akam.net is one of the listed nameservers.
  • ✓ Contact dnsadmin@six-group.com #25
    The SOA RNAME dnsadmin.six-group.com means dnsadmin@six-group.com.
  • ✓ Timestamp serial #26
    The serial 2012266444 is a Unix timestamp (2033-10-07 02:54 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
10 iterations, 14-byte salt
Signatures valid until
25 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2302RSASHA256 (8)SHA256 C8DE4BF5524B5597…yes
46246RSASHA256 (8)SHA256 FE8177E74983DD2C…NO

DNSKEY in the zone

Key tagRoleAlgorithm
12723ZSK (256)RSASHA256 (8)
59059ZSK (256)RSASHA256 (8)
43281ZSK (256)RSASHA256 (8)
2302KSK (257)RSASHA256 (8)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • i
    Unused DS records
    These DS records match no key in the zone: key tag 46246 (SHA256). That is normal during a key rollover; otherwise remove them.
    #28
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 96h0m0s and created on demand; the current one was made at 2026-10-21 21:59 UTC and expires at 2026-10-25 22:15 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 10 iterations and a 14-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Records

pass

47 records at the apex

Found

Read from
193.108.91.232:53
TypeValueTTL
SOAa1-232.akam.net. dnsadmin.six-group.com. 2012266444 3600 360 2592000 300300
NSa1-232.akam.net.300
NSns1.six-group.com.300
NSa18-67.akam.net.300
NSa24-67.akam.net.300
NSa20-65.akam.net.300
NSns2.six-group.com.300
NSa5-66.akam.net.300
A153.46.97.43600
MX10 mail9.six-group.com.300
MX30 mail7.six-group.com.300
MX10 mail5.six-group.com.300
MX10 mail10.six-group.com.300
MX30 mail8.six-group.com.300
MX30 mail12.six-group.com.300
MX30 mail11.six-group.com.300
MX10 mail6.six-group.com.300
TXT"+q8L1oaWIsFsxQTODa2Cb9YJv0gLZij+q8Ra95VJfNioXqkmw//TbzUHf81Xvm8Oi/HYitFne6/AzJ3Amd6r9A=="300
TXT"docusign=02d3117b-f80c-4593-8e45-d5ea0b57bd7f"300
TXT"google-site-verification=pL1pCZwiJR9_P3szcLC7TAVCJbbAF0f8zJ7TNc2SMhg"300
TXT"atlassian-domain-verification=66bPlctYbscTL1OBCIKlVNJo4wGnRx42ZCt75a1JgXDglr7XFONbZxwrLbeiZ3Ur"300
TXT"v=spf1 ip4:153.46.243.96/27 ip4:153.46.252.96/27 include:285283.spf01.hubspotemail.net include:spf.protection.outlook.com include:_spf-dc33.sapsf.eu ip4:130.214.193.81 a:smtp.cetrel.lu ip4:153.46.105.72 ip4:153.46.97.104 -all"300
TXT"_8z2onnhc8z7hgfdy087oafu08qw8dz6"300
TXT"docker-verification=62891d65-8981-4af0-8d01-1d3765d3b14b"300
TXT"docusign=fa2b5953-50cd-4d85-928e-a83c4c3e922e"300
TXT"adobe-idp-site-verification=18f2c1fcddfbf411a02ca3397ef6189e071e050a30108ced99168a9561eed048"300
TXT"1password-site-verification=X4M5YMEAUZBPXCIFFHY6KSV4OU"300
TXT"ylx3rldtp2ctpxhz6lgt8cqb758slzh7"300
TXT"infoblox-domain-mastery=28b617bb662383d4dcb5196384c84d05a6885946cb6c9ac61de5aa9635e699a9b0"300
TXT"openai-domain-verification=dv-gOkUsu96m8xSnwxsCWqZXrQI"300
TXT"swisssign-check=3Q3iRXVhdiMXHysE6JlRWFuV0_A"300
TXT"H9XMvkfyQtN4dsT9yEus9Qc6iQKSsX3i7lb4nFwHkW98P55CSto3PUPv5kGiiOzKiC6/P96qvcR2ytvmsriLWg=="300
TXT"cisco-ci-domain-verification=3bf3661899688e76c4d22ee54cf63964d44b134f4c356d34740baf7f5abf7411"300
TXT"onetrust-domain-verification=3c620aa1c5a2437bad833eb31bc81d14"300
TXT"F95KLqH7tAO9wv0hzdvRmscdhG3npjcs2hvSMHRvb/ov9tB6EjfN2lhWZYYrzd0GcxLlUfcsGnGjLz+lQ+WaIg=="300
TXT"safebreach-domain-verification=b0c25c2b-679d-468c-bf7e-3c0971a36719"300
TXT"MS=ms79270974"300
TXT"successfactors-site-verification=MmUwNzY2YWU1NDBlNGI0MWE0YjQ4OGQwYjdkYTdiYjhkMjk4M2U3ZGY5ZmQ1ODVmNGExZTI4ZWYzOTgwNjIwMg=="300
TXT"anthropic-domain-verification-2zsaqa=E7rPnaLOiCuYkPOzuDyx0DvoY"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "amazontrust.com"300
CAA0 issue "awstrust.com"300
CAA0 issue "swisssign.com"300
CAA0 issue "amazonaws.com"300
CAA0 issue "pki.goog"300
CAA0 issue "amazon.com"300
CAA0 issue "digicert.com"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, amazontrust.com, awstrust.com, swisssign.com, amazonaws.com, pki.goog, amazon.com, digicert.com.