merckgroup.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
iAll checks passed
30 passed 0 warnings 0 failed 5 info

Registration

info

.com generic · Key-Systems GmbH · expires 2027-04-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Key-Systems GmbH
Registered
14 April 2000
Last changed
13 March 2026
Expires
14 April 2027
Status
client delete prohibited, client transfer prohibited
Registry nameservers
ns01.brandshelter.com, ns02.brandshelter.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 2027-04-14 #3
    The registration is valid until 2027-04-14 (174 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns01.brandshelter.com, ns02.brandshelter.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns01.brandshelter.com, ns02.brandshelter.net
NS in the zone
ns01.brandshelter.com, ns02.brandshelter.net
NameserverAddressesNetwork (AS)Glue
ns01.brandshelter.com193.227.117.15 2a04:2b00:14cc::15AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT193.227.117.15 2a04:2b00:14cc::15
ns02.brandshelter.net194.50.187.16 2a04:2b00:14dd::16AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.brandshelter.com, ns02.brandshelter.net.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ 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

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.brandshelter.com 193.227.117.15NOERROR, 18 ms, authoritativenoyes / yesrefusedreg-ber1
ns01.brandshelter.com 2a04:2b00:14cc::15NOERROR, 17 ms, authoritativenoyes / yesrefusedreg-ber1
ns02.brandshelter.net 194.50.187.16NOERROR, 13 ms, authoritativenoyes / yesrefusedreg-wie1
ns02.brandshelter.net 2a04:2b00:14dd::16NOERROR, 14 ms, authoritativenoyes / yesrefusedreg-wie1

Checks

  • ✓ All respond #14
    All 4 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns01.brandshelter.com: "reg-ber1"; ns02.brandshelter.net: "reg-wie1".
    #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 2026105066 · primary ns01.brandshelter.com

Found

Primary (MNAME)
ns01.brandshelter.com
Contact (RNAME)
tech.brandshelter.com
Serial
2026105066
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns01.brandshelter.com (193.227.117.15)2026105066
ns01.brandshelter.com (2a04:2b00:14cc::15)2026105066
ns02.brandshelter.net (194.50.187.16)2026105066
ns02.brandshelter.net (2a04:2b00:14dd::16)2026105066

Checks

  • ✓ Serial 2026105066 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.brandshelter.com is one of the listed nameservers.
  • ✓ Contact tech@brandshelter.com #25
    The SOA RNAME tech.brandshelter.com means tech@brandshelter.com.
  • ✓ Timestamp serial #26
    The serial 2026105066 is a Unix timestamp (2034-03-16 06:57 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
19199ECDSAP256SHA256 (13)SHA256 14F4335825689A2F…yes

DNSKEY in the zone

Key tagRoleAlgorithm
19199KSK (257)ECDSAP256SHA256 (13)
37461ZSK (256)ECDSAP256SHA256 (13)

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 19199 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

102 records at the apex

Found

Read from
193.227.117.15:53
TypeValueTTL
SOAns01.brandshelter.com. tech.brandshelter.com. 2026105066 10800 3600 604800 300300
NSns02.brandshelter.net.300
NSns01.brandshelter.com.300
A185.123.52.1993600
AAAA2a10:ec6:1:3:185:123:52:1993600
MX10 mxa-005f4802.gslb.pphosted.com.3600
MX10 mxb-005f4802.gslb.pphosted.com.3600
TXT"globalsign-domain-verification=3298e7c1bab12b0a5dacc215120385d0"86400
TXT"00Ddb0000016GXl=1TBdb00000006QP"86400
TXT"edb73892-df13-46bb-a7d4-650d2e9cec00"86400
TXT"S8AwAdAJdEhugQ_4W1NRGPzA9FURn9xx5z1m37_EXgM"86400
TXT"nvvrpj5fqt19k9cmsy6b8m14t82y3q57"86400
TXT"QgmU5rLmZMakjrpK7Uuz/JPHvwzVuzVKH8ZnSDbyjEa/L0KoxWGU87Lih5G3JVsGdue4sAwg2l5MRiRvys1q2Q=="86400
TXT"A9720D10DE6A932EAB6D6C0B909310490F05D416457E2AC31D31505DDD9A995E"86400
TXT"MS=ms62942673"86400
TXT"jrtm7m3637l39grnq43lwfm374mcl35z"86400
TXT"_globalsign-domain-verification=odg-rQ8uU32r6uo_qSyXfoIb6eyWABBt30zxwYeiEn"86400
TXT"globalsign-domain-verification=6ca93d469130a0366e5dd17d34db15a8"86400
TXT"onetrust-domain-verification=6d96d7bc639e44a0a186a442cd560d66"86400
TXT"globalsign-domain-verification=FF8F9F13C2E42F0676F997DFD8526151"86400
TXT"google-site-verification=ArEy3TTnGpS0pMU52cpK3bhDLRjUwc8P8ZqqCy8FAzA"86400
TXT"_u9k9eaitii9w66df194d90x6c8gqb31"86400
TXT"autodesk-domain-verification=EsvmxOoXKZw6-wBEveg9"86400
TXT"_globalsign-domain-verification=F-CGhhfC61qW3Qhgm_SCKTLjBJtroPWJhEtrCeygYX"86400
TXT"globalsign-domain-verification=672B70B35819FF88F0F97C5A4AFDFD5F"86400
TXT"facebook-domain-verification=qfna1fh2x8cirb1g5fek6lqtk8cx0s"86400
TXT"google-site-verification=1TInUk3q8IiYAyhwTXE4QiWEEXG-TZaM-y1nMmQ43J4"86400
TXT"onetrust-domain-verification=df3b22339f9e4bd59265953e9f56e231"86400
TXT"00D9Q00000MVUoL=1TB9Q0000000MAF"86400
TXT"_globalsign-domain-verification=UoYyt8bwvt_C1RCW3yDfaf1UDSgfxd4sYFvN7Gt0Wc"86400
TXT"google-site-verification=13j5RsWWSpUnDKeT6-M64VqNiDlbQ08CXhH7uyeSI8E"86400
TXT"adobe-sign-verification=b7280aee1fe7429cad642dbf1aa66"86400
TXT"google-site-verification=NL_bb-K_-v6UUgaFiQtbvybpsfawMw98VZV8VW77b9E"86400
TXT"v=spf1 include:cjzkgd0qut.powerspf.com ~all"86400
TXT"docusign=e1bcb1ae-4106-49c0-83f9-999a0bdd5266"86400
TXT"onetrust-domain-verification=9e170fe17c1547f5b608582be3fcf295"86400
TXT"atlassian-domain-verification=Y8KJQuiENhdtAaornCixPGyTpEXzg0bZFfxkXpjq3FdBTGSdKMuFJLTLdhWwCWZc"86400
TXT"e078e04182ec4c7fbd399d3139dea525"86400
TXT"globalsign-domain-verification=CADAD14B587E1CBB8174EDF095C0E337"86400
TXT"adobe-sign-verification=c3c24c96844549ebf6e5a1e83e17f2a"86400
TXT"logmein-verification-code=e27b831a-18b6-437e-896c-1814dddb15da"86400
TXT"_vwu83koapwauumracv4z1ncnp7r2u9v"86400
TXT"pldsbv4zv1qntzymn2jdsvbx6h24wtkb"86400
TXT"mandrill_verify.LjoS5f6s9D9YkLNiVTKNMQ"86400
TXT"jamf-site-verification=Ma_t8FMf8i67qBrsw0DR0Q"86400
TXT"docusign=1f3be22e-e491-4725-9e15-86809fa5c222"86400
TXT"MS=ms98109651"86400
TXT"clbljp0f4yb3753vy8dpg1kh9h78m2cj"86400
TXT"cisco-ci-domain-verification=391b1d75823008b7fb71b8331d36b79e07f409c00dfd46ed2489691a0a63a21c"86400
TXT"_globalsign-domain-verification=bBnDLgw0Trfq4xFVgiX1A-ekV6aAp6iohTI-q3CFy-"86400
TXT"google-site-verification=EZ21rZ1jZWDiw1r67bfS5aCZWNl3Gw_vZ8yQXNQ5kQo"86400
TXT"canva-site-verification=GZwH7RbnnHKjjMfr7dXb4g"86400
TXT"_globalsign-domain-verification=znEvPlkQ5EYCk2GgzdDm59LWjwT_Yb-2nooItM5F9J"86400
TXT"globalsign-domain-verification=c5c1ef19b1097b55b222810090ec3932"86400
TXT"globalsign-domain-verification=05E24A395B5B1221E38F1034987DCB7B"86400
TXT"MS=ms92399868"86400
TXT"Dynatrace-site-verification=4060b726-03ec-41e8-9d39-91c39593e25d__i15mvqponp6lbar9fh9uqmh9u0"86400
TXT"adobe-sign-verification=4919ecb8a46726e116702cec78889c47"86400
TXT"globalsign-domain-verification=508FCEDC361F491765090794770DB3F7"86400
TXT"globalsign-domain-verification=90CC33AE3470F9C0FF2041168FA11026"86400
TXT"google-site-verification=ORXjfTkNUh65Kt0RLBRtDjVNJaDtO-2CQaJgyc4FJvM"86400
TXT"9DAA-6F09-B37E-475C-29C3-85C2-F292-E971"86400
TXT"facebook-domain-verification=6jat9gc0vmlyzsn6s0ar3yrtb0ki4j"86400
TXT"C60728AD0F404D5E0679CEC2C18D062E2E142EAF91E8A7EA2EA19BFB6448BA0E"86400
TXT"tq1679fk9lmdt222kjx1dk03k3l68c6g"86400
TXT"zoom=9401602"86400
TXT"_5a5lk6fbbublepopvlstnkhv6g6jt2a"86400
TXT"docusign=1ea199cb-851f-486b-8a77-d129151bd593"86400
TXT"adobe-idp-site-verification=92a8d3a722c314cb549145e06142f6b0becfe8932c5ee6c34d955702de2aedfd"86400
TXT"successfactors-site-verification=MmZkZmQ5OGJiYzJkMzk2NWRmNGY1OTE5MjFmN2Q2ZDYyMzI1MGY1OTZkYmQwNTM4MTg5MjVmYjJmMWU2Mjg4Mw=="86400
TXT"globalsign-domain-verification=642D3019DCA4453AD934A81F6EA1B0C1"86400
TXT"workplace-domain-verification=uo07d6dF2zyVnJcdj3T9fMRPnGBPxV"86400
TXT"access-domain-verification=87665deda7e0c029b72f98b1750fbc8a3ebce060e893d2a46e0f0281b5186ddf"86400
TXT"mailru-verification: 20faead2ec98a0cf"86400
TXT"openai-domain-verification=dv-vgIkNvgXj44dFo6EZf0xB3h8"86400
TXT"google-site-verification=zfv9RdHx_HzDwkubNbiTHC7QSNb_Td0Y9kWzPm5it_Q"86400
TXT"_globalsign-domain-verification=3DA9lo0aKynv8l9sh5xz2fku4v1daaysBfW-4ajvvo"86400
TXT"google-site-verification=SC4cXBvy8UFQW9P9nLp6upJbCwL9c664xK_ICKsNtK8"86400
TXT"facebook-domain-verification=v7hk9c1ec476vknpo9ntm282gq2ljv"86400
TXT"globalsign-domain-verification=C9A17B03D82D35FCE5A050A52EB124E3"86400
TXT"brevo-code:2b2fb4709ea953dd68210af08faa0eae"86400
TXT"adobe-sign-verification=507110f471619599ccd70d7829daa9cf"86400
TXT"_qeapzxdelh7xfhnlqcuywo7ygi7hifv"86400
TXT"globalsign-domain-verification=8D67ED29473AF8D486369FE92B8ADF8F"86400
TXT"_globalsign-domain-verification=mxLOQfk5kfpkwXkneyRdH4GMqoK1UkKsexyFzL3rQi"86400
TXT"f5160d77b1vvj3rkqcsq5fcchm79f15n"86400
TXT"_jdbybyvr1xgl0seggeaulr1rjblrynz"86400
TXT"b9cf0cf9740e49479bf26080c6439ba3"86400
TXT"smartsheet-site-validation=hCCdBOlfnX4svq1d8ZNEUP2QKAJUsuCc"86400
TXT"successfactors-site-verification=OGQyOWMyNWFhMjFiYWMyN2M0NzFmYTU3ZTcyZDU4YTVhMmY1MDg0ZmUzZWUzNGY5OTM5YWVjZjFlN2M1M2VhMw=="86400
TXT"globalsign-domain-verification=2736548945a6dc1ade02982712fdaf31"86400
CAA0 issuewild "amazon.com"3600
CAA0 issue "entrust.net"3600
CAA0 issue "digicert.com"3600
CAA0 issue "globalsign.com"3600
CAA0 issuewild "globalsign.com"3600
CAA0 issuewild "digicert.com"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "godaddy.com"3600
CAA0 issue "amazon.com"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "entrust.net"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1h, 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.
  • 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
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, entrust.net, digicert.com, globalsign.com, letsencrypt.org, godaddy.com.