siemens.com

Checked 22 October 2026, 10:42 UTC · via 8.8.8.8
!Passed with warnings
31 passed 2 warnings 0 failed 2 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-09-28

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
29 September 1986
Last changed
24 September 2026
Expires
28 September 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-16.akam.net, a10-64.akam.net, a11-66.akam.net, a13-65.akam.net, a2-67.akam.net, a28-65.akam.net, ns1.f5cloudservices.com, ns2.f5cloudservices.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 2027-09-28 #3
    The registration is valid until 2027-09-28 (340 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

pass

a1-16.akam.net, a10-64.akam.net, a11-66.akam.net, a13-65.akam.net, a2-67.akam.net, a28-65.akam.net, ns1.f5cloudservices.com, ns2.f5cloudservices.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-16.akam.net, a10-64.akam.net, a11-66.akam.net, a13-65.akam.net, a2-67.akam.net, a28-65.akam.net, ns1.f5cloudservices.com, ns2.f5cloudservices.com
NS in the zone
a1-16.akam.net, a10-64.akam.net, a11-66.akam.net, a13-65.akam.net, a2-67.akam.net, a28-65.akam.net, ns1.f5cloudservices.com, ns2.f5cloudservices.com
NameserverAddressesNetwork (AS)Glue
a1-16.akam.net193.108.91.16 2600:1401:2::10AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a10-64.akam.net96.7.50.64 2600:1480:d000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-65.akam.net2.22.230.65 2600:1480:800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-67.akam.net95.100.174.67 2600:1480:7000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-65.akam.net95.100.173.65 2600:1480:d800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
ns1.f5cloudservices.com107.162.234.197 2604:e180:1071::3:1AS55002 DEFENSE-NET - F5, Inc., US AS55002 DEFENSE-NET - F5, Inc., US107.162.234.197 2604:e180:1071::3:1
ns2.f5cloudservices.com107.162.176.221 2604:e180:1071::ffff:6ba2:b0ddAS55002 DEFENSE-NET - F5, Inc., US AS55002 DEFENSE-NET - F5, Inc., US107.162.176.221 2604:e180:1071::ffff:6ba2:b0dd

Checks

  • ✓ 8 nameservers #6
    Delegated to a1-16.akam.net, a10-64.akam.net, a11-66.akam.net, a13-65.akam.net, a2-67.akam.net, a28-65.akam.net, ns1.f5cloudservices.com, ns2.f5cloudservices.com.
  • ✓ 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 8 IPv4 /24s and 7 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): 11 addresses; AS55002 (DEFENSE-NET - F5, Inc., US): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

16 of 16 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-16.akam.net 193.108.91.16NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a1-16.akam.net 2600:1401:2::10NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a10-64.akam.net 96.7.50.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a10-64.akam.net 2600:1480:d000::40NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a11-66.akam.net 84.53.139.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a11-66.akam.net 2600:1480:1::42NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a13-65.akam.net 2.22.230.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a13-65.akam.net 2600:1480:800::41NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a2-67.akam.net 95.100.174.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a2-67.akam.net 2600:1480:7000::43NOERROR, 3 ms, authoritativenoyes / yesrefused48878.29
a28-65.akam.net 95.100.173.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.29
a28-65.akam.net 2600:1480:d800::41NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
ns1.f5cloudservices.com 107.162.234.197NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns1.f5cloudservices.com 2604:e180:1071::3:1NOERROR, 172 ms, authoritativenoyes / yesrefused-
ns2.f5cloudservices.com 107.162.176.221NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns2.f5cloudservices.com 2604:e180:1071::ffff:6ba2:b0ddNOERROR, 22 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 16 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: a1-16.akam.net: "41824.11"; a1-16.akam.net: "41824.6"; a10-64.akam.net: "48878.30"; a10-64.akam.net: "48878.32"; a11-66.akam.net: "41824.5"; a13-65.akam.net: "41824.6"; a13-65.akam.net: "41824.11"; a2-67.akam.net: "48878.32"; a2-67.akam.net: "48878.29"; a28-65.akam.net: "48878.29"; a28-65.akam.net: "48878.31". 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 2026102127 · primary a1-16.akam.net

Found

Primary (MNAME)
a1-16.akam.net
Contact (RNAME)
hostmaster.siemens.com
Serial
2026102127
Refresh / retry
3600 s / 600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
a1-16.akam.net (193.108.91.16)2026102127
a1-16.akam.net (2600:1401:2::10)2026102127
a10-64.akam.net (96.7.50.64)2026102127
a10-64.akam.net (2600:1480:d000::40)2026102127
a11-66.akam.net (84.53.139.66)2026102127
a11-66.akam.net (2600:1480:1::42)2026102127
a13-65.akam.net (2.22.230.65)2026102127
a13-65.akam.net (2600:1480:800::41)2026102127
a2-67.akam.net (95.100.174.67)2026102127
a2-67.akam.net (2600:1480:7000::43)2026102127
a28-65.akam.net (95.100.173.65)2026102127
a28-65.akam.net (2600:1480:d800::41)2026102127
ns1.f5cloudservices.com (107.162.234.197)2026102127
ns1.f5cloudservices.com (2604:e180:1071::3:1)2026102127
ns2.f5cloudservices.com (107.162.176.221)2026102127
ns2.f5cloudservices.com (2604:e180:1071::ffff:6ba2:b0dd)2026102127

Checks

  • ✓ Serial 2026102127 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 a1-16.akam.net is one of the listed nameservers.
  • ✓ Contact hostmaster@siemens.com #25
    The SOA RNAME hostmaster.siemens.com means hostmaster@siemens.com.
  • ✓ Date-based serial #26
    The serial 2026102127 follows the YYYYMMDDnn convention (2026-10-21).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
10 iterations, 8-byte salt
Signatures valid until
21 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
56369RSASHA256 (8)SHA256 50FCEC747A93A9BF…yes

DNSKEY in the zone

Key tagRoleAlgorithm
32131ZSK (256)RSASHA256 (8)
18390ZSK (256)RSASHA256 (8)
56369KSK (257)RSASHA256 (8)
43641ZSK (256)RSASHA256 (8)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 56369 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-21 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-21 14:09 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 10 iterations and a 8-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

info

96 records at the apex

Found

Read from
193.108.91.16:53
TypeValueTTL
SOAa1-16.akam.net. hostmaster.siemens.com. 2026102127 3600 600 604800 300300
NSa1-16.akam.net.300
NSa13-65.akam.net.300
NSns2.f5cloudservices.com.300
NSns1.f5cloudservices.com.300
NSa28-65.akam.net.300
NSa10-64.akam.net.300
NSa11-66.akam.net.300
NSa2-67.akam.net.300
A76.223.52.96300
A13.248.167.215300
MX10 siemens-com.h-v1.mx.microsoft.300
TXT"cvblatjf1vdgd7oid10fvm6o73"300
TXT"smartsheet-site-validation=t1TwXt7GRwJJrSMgxG8A27uhLHirpDZc"300
TXT"d365mktkey=3r3bww4jtipswj5al6i3obvf4"300
TXT"g5d41pbvsmrf006nc55p0f4rlf"300
TXT"d365mktkey=5ex1u802is2171vkwrk4d9kts"300
TXT"3d6c6d6af31c40cf222bac48c19f92c09a19109085c2b8f8adb4be28a2a32f01"300
TXT"00D300000006woe=1TBVb00000001hk;00DHu000007vQ2W=1TBaZ00000006VF"300
TXT"qqjij87k7jbn20n4qjn7r1sjll"300
TXT"d365mktkey=IyjVN0RuBJWFBFG7hX5BpmeM3lLRwaGz19nEeWrfgv8x"300
TXT"SFMC-Vy1F7X9GpAR-9VrvI__OOCzi6gzZapqbnLQgp1ZM"300
TXT"hphsd7o9s7jd3k1lubufcombrm"300
TXT"asv=795e5e26a3e3ffdd22a93504ae121293"300
TXT"adobe-sign-verification=3b7ebc0a7e5235e5a8993792bbb0447"300
TXT"OSSRH-86130"300
TXT"onetrust-domain-verification=0ece3850de184fcc8c57686546a16794"300
TXT"os0ibvmikadml6di0krkfq2ro8"300
TXT"mongodb-site-verification=mt3V85WLWc9THaNQXSDoLcGRJZozvsCs"300
TXT"aksjnche6v0ra7j14a81prblvs"300
TXT"227o2t2sa7lt162hnf5c9cdp7d"300
TXT"d0d0hicapn4klt4etqfqnqmta4"300
TXT"cloudhealth=ab72f57f-96fb-4bab-9fc3-024c7ede6e62"300
TXT"00d300000006woeeaa"300
TXT"m5ao28bo0k75a3l141tepjmutu"300
TXT"msfpkey=42spf0s3tejgp3xvy42tve53b"300
TXT"adobe-idp-site-verification=a1b049a7078d9496425ce11f82f1d4c0986ce42f4f8d64d6dcfba48de7f6e0ed"300
TXT"HdnJRoQY6iA+EVS/RKZDBaI8c68ubXk/DJ57gbqnpForX2H80nZGniE7C1C/2DpiGzrf55u9hjkPdnFdmWxcMA=="300
TXT"apple-domain-verification=oFzVIFMg8yizAERG"300
TXT"onetrust-domain-verification=2b5ba24fcf8c4c76a9e9ed664fdb0200"300
TXT"g52qlo68f00s2vl6kqdcqsjrr1"300
TXT"cisco-ci-domain-verification=273c776eeb6c39cfcb114d41995dbf08d5ef7888e8e6a69584ea9ff77d4655a9"300
TXT"docker-verification=8df8f830-a9d4-4482-a707-24dedddcca6a"300
TXT"vbkgsls0700qvr66aoigogr4kr"300
TXT"xfJvFDwYiuRkANdMr+BuXZ9VVprV7kg7z2ef+JLrDSCMjLZPtw/q7jhBqCP0hnWQeX87Ja+LLoulxBRPAVoI9g=="300
TXT"v=spf1 exists:%{i}.spf.siemens.com include:spf.protection.outlook.com include:all.spf.avature.net include:mail.zendesk.com -all"300
TXT"n92t0eh06mok6qorj0hj5v5poe"300
TXT"facebook-domain-verification=w73k38t20g5cdo7apedgm2o48x6rr8"300
TXT"atlassian-domain-verification=ddahAPY7fy1Bqo0cZUtUUU03JhLmCYOGqgwfEex26Ucbrf8pYUB3hcjixMFtyb1I"300
TXT"atlassian-sending-domain-verification=d41e9244-8bea-422c-ab73-638158144ab5"300
TXT"balr97dij9f202iqifsv3rcqdd"300
TXT"google-site-verification=X8gG8wfqjgklsKMbyURORr8tt04XEPDsLDBQzyvmSUQ"300
TXT"atlassian-domain-verification=icjsJdhCva8jYj2OQ8GFkcDsWp0ixXreZq2KsyvxiSakEHncgS5loPRf9MbwAXst"300
TXT"asuid.trade-finance-survey-platform=EB8B5F174EB7830B34515F9CF6E87A2ADF52802ED41865771BF57125100F47D7"300
TXT"adobe-sign-verification=db607c489b31ea1d3e40f25d9e976e2a"300
TXT"amazonses:E8V+lV+QDJ+3ZSOIGflGs5r0V2I4ZdRmK30FINPjrqo="300
TXT"google-site-verification=wnZTqqhJkDGUaZs267-1lC3TNl7mxR-ralIoFcYB5oQ"300
TXT"hcp-domain-verification=460ef05d7108cff9d9a5958020468695311836b3066bec6d220cc0a488f20800"300
TXT"3vepbhksbrj1rgkmbsu99edatj"300
TXT"DomainVerification=3GOSNKKXM4GMF3TJXTZ916HK5R0LM0ZLPI4UM96VINH50CDMQHWU62I6Z5JYV8AI"300
TXT"atlassian-domain-verification=P0uHwbJeN95ur9Oj095AY1sKOD5cy34MLWaaQuQvEqxP0r5OyYeLcHKOQuOsZcBl"300
TXT"apple-domain-verification=LLjpes1fLAPtUo9u"300
TXT"atlassian-domain-verification=op2vv14QjFlJ1bVo6EZokipeON7DNvW38jh9gwyy8GHSmn05j5FxNNn0gQP7V2r/"300
TXT"qa4a7nkbvk2eskf95249g8osnm"300
TXT" _o7w3wzppun2d7306lekd2trktohoxaz"300
TXT"bluebeam-verification=bvn1me3odw2zcnh4k3wju10ruwfhiq"300
TXT"evtqblmhjr4qj24ivduunlutd3"300
TXT"openai-domain-verification=dv-UgvgF0vIaG8dQwPGC6ySf5QX"300
TXT"figma-domain-verification=949d2d11dd8c7e89ac6090bb4658ee77931cae61fab1f36ffead6b34e5ddea49-1727687415"300
TXT"00DOz00000DRbs1=1TBOz0000000LUH; 00D7x00000QL27t=1TB7x0000000Iub; 00DD10000001Ymq=1TBOv0000000me9; 00DD30000001Uzv=1TBOv0000000mhN; 00DO100000HNMu8=1TBO10000000Jty; 00DHu000002uBt8=1TBPs0000000AH8"300
TXT"google-site-verification=Mjkm9E3bUvhpoOI40x-Sz6mKW1ymubuqmtVBCvJZIAk"300
TXT"d365mktkey=5v0mrfwg7vdqyfbl39zfs8izs"300
TXT"infoblox-domain-mastery=8b6102614021a9ab78902be969d370b36f17451c11d46a3221b628a120487e4017"300
TXT"9d7tjvuaeecdan2nsc8qg122vb"300
TXT"d365mktkey=WUujKcQe9HmhxPuxXavB93xj0h95NwSA9g1z7agDeCAx"300
TXT"MS=ms15950903"300
TXT"d365mktkey=RPp9b0ySQ2Kayj88aOXQgWzhzCB7FvaEEGZ7YuNIeuAx"300
TXT"apple-domain-verification=hpYfu3OMSoaGYddz"300
TXT"65801qsqu4tv9qko1p0kftl9pf"300
TXT"s78jr911na85vkeqg3mh8p10hh"300
TXT"johngh70e92k0den0ruuna2u94"300
TXT"amazonses:V0id9QaER/A2VlXzNbVzuKxP092x8goVy8leNWsrmqw="300
TXT"apple-domain-verification=fhQV75F8g0MzmWfS"300
TXT"apple-domain-verification=AhqbLT2JFuKF9OwC"300
TXT"2t6sv99hino8jpsckq6kvnackj"300
TXT"88dq0un6jh8urfcn7c76moc91o"300
TXT"jtkfd5dnjcffv1k8ncj3gip9el"300
TXT"atlassian-sending-domain-verification=9f382ec2-5d8a-46d2-9d4a-d6876fd7117a"300
TXT"00D0900000B2BL0=1TBQF0000000HdZ"300
TXT"00D7Q000000J8E4=1TBOf00000001NV"300
TXT"pendo-domain-verification=BBWBGgaHNz9FJBbkmfPFi1WqauA"300
TXT"mUXf3POXp0E8hFxxjg6rIUxzANLs122deDIzbndySQolRh4e6knjssYyNTXNQH75AdvVTVEfmtie8eY61NIxlQ=="300
TXT"2gvejei35pvelu4n3o2qlqjpsp"300
TXT"Wbroopervfun3vp52re59pu9mn4"300
TXT"00DVZ0000037zhl=1TBVZ0000000Q7Q;00DVa000001Bs9N=1TBVa00000004wV;00DD30000001WId=1TBOv0000000mmF;00DWJ000004Qo8X=1TBWJ00000005Sj;00DDx0000002Eeu=1TBWJ0000000422;00DDz000001qe8i=1TBOt0000000JvW"300
TXT"paloaltonetworks-site-verification=12ddf3f63b63b77fef4a76b63aa223de77fca6e768fe4cecbe8fcc78c48f7cbf"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, 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.
  • 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