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Zone microsoft.com · Checked 22 October 2026, 07:35 UTC · via 8.8.8.8
!Passed with warnings
26 passed 3 warnings 0 failed 2 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-05-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
2 May 1991
Last changed
29 January 2026
Expires
3 May 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
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 2027-05-03 #3
    The registration is valid until 2027-05-03 (192 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update 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

warn

ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
NS in the zone
ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
NameserverAddressesNetwork (AS)Glue
ns1-39.azure-dns.com150.171.10.39 2603:1061:0:10::27AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US150.171.10.39
ns2-39.azure-dns.net150.171.16.39 2620:1ec:8ec:10::27AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns3-39.azure-dns.org13.107.222.39 2a01:111:4000:10::27AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns4-39.azure-dns.info13.107.206.39 2620:1ec:bda:10::27AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1-39.azure-dns.com (glue 150.171.10.39, zone 150.171.10.39, 2603:1061:0:10::27). Update the glue at your registrar.
    #8
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 8 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 4 TLDs #12
    Nameserver names use the TLDs .com, .info, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1-39.azure-dns.com 150.171.10.39NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1-39.azure-dns.com 2603:1061:0:10::27NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns2-39.azure-dns.net 150.171.16.39NOERROR, 4 ms, authoritativenoyes / yesrefusedKnot DNS 3.1.2.1770717641.d6b376aff
ns2-39.azure-dns.net 2620:1ec:8ec:10::27NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns3-39.azure-dns.org 13.107.222.39NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns3-39.azure-dns.org 2a01:111:4000:10::27NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns4-39.azure-dns.info 13.107.206.39NOERROR, 4 ms, authoritativenoyes / yesrefusedKnot DNS 3.1.2.1770717641.d6b376aff
ns4-39.azure-dns.info 2620:1ec:bda:10::27NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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: ns2-39.azure-dns.net: "Knot DNS 3.1.2.1770717641.d6b376aff"; ns4-39.azure-dns.info: "Knot DNS 3.1.2.1770717641.d6b376aff". 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 1 · primary ns1-39.azure-dns.com

Found

Primary (MNAME)
ns1-39.azure-dns.com
Contact (RNAME)
azuredns-hostmaster.microsoft.com
Serial
1
Refresh / retry
3600 s / 300 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1-39.azure-dns.com (150.171.10.39)1
ns1-39.azure-dns.com (2603:1061:0:10::27)1
ns2-39.azure-dns.net (150.171.16.39)1
ns2-39.azure-dns.net (2620:1ec:8ec:10::27)1
ns3-39.azure-dns.org (13.107.222.39)1
ns3-39.azure-dns.org (2a01:111:4000:10::27)1
ns4-39.azure-dns.info (13.107.206.39)1
ns4-39.azure-dns.info (2620:1ec:bda:10::27)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 5m, expire 28d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1-39.azure-dns.com is one of the listed nameservers.
  • ✓ Contact azuredns-hostmaster@microsoft.com #25
    The SOA RNAME azuredns-hostmaster.microsoft.com means azuredns-hostmaster@microsoft.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

pass

69 records at the apex

Found

Read from
150.171.10.39:53
TypeValueTTL
SOAns1-39.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 3003600
NSns1-39.azure-dns.com.172800
NSns2-39.azure-dns.net.172800
NSns3-39.azure-dns.org.172800
NSns4-39.azure-dns.info.172800
A150.171.109.1013600
AAAA2603:1061:14:63::13600
MX10 microsoft-com.mail.protection.outlook.com.3600
TXT"d365mktkey=3uc1cf82cpv750lzk70v9bvf2"3600
TXT"facebook-domain-verification=fwzwhbbzwmg5fzgotc2go51olc3566"3600
TXT"google-site-verification=pjPOauSPcrfXOZS9jnPPa5axowcHGCDAl1_86dCqFpk"3600
TXT"fg2t0gov9424p2tdcuo94goe9j"3600
TXT"t7sebee51jrj7vm932k531hipa"3600
TXT"google-site-verification=M--CVfn_YwsV-2FGbCp_HFaEj23BmT0cTF4l8hXgpvM"3600
TXT"google-site-verification=GfDnTUdATPsK1230J0mXbfsYw-3A9BVMVaKSd4DcKgI"3600
TXT"d365mktkey=SxDf1EZxLvMwx6eEZUxzjFFgHoapF8DvtWEUjwq7ZTwx"3600
TXT"hubspot-developer-verification=OTQ5NGIwYWEtODNmZi00YWE1LTkyNmQtNDhjMDMxY2JjNDAx"3600
TXT"d365mktkey=QDa792dLCZhvaAOOCe2Hz6WTzmTssOp1snABhxWibhMx"3600
TXT"d365mktkey=6358r1b7e13hox60tl1uagv14"3600
TXT"google-site-verification=uFg3wr5PWsK8lV029RoXXBBUW0_E6qf1WEWVHhetkOY"3600
TXT"docusign=d5a3737c-c23c-4bd0-9095-d2ff621f2840"3600
TXT"d365mktkey=j2qHWq9BHdaa3ZXZH8x64daJZxEWsFa0dxDeilxDoYYx"3600
TXT"atlassian-domain-verification=xvoaqRfxSg3PnlVnR4xCSOlKyw1Aln0MMxRiKXnwWroFG7vI76TUC8xYb03MwMXv"3600
TXT"workplace-domain-verification=lK0QDLk73xymCYMKUXNpfKAT8TY5Mx"3600
TXT"google-site-verification=uhh5_jbxpcQgnb-A7gDIjlrr5Ef34lA2t2_BAveYpnk"3600
TXT"MS=ms79629062"3600
TXT"d365mktkey=3l6dste9txazu0Qd2zu4135PUB4E35txLxyzJxjkPbsx"3600
TXT"d365mktkey=wbU64GRacxVEQxwcLSQnx0zisXLYzgUbfvsufIqO9ZUx"3600
TXT"linear-domain-verification=iuq6saifcnbe"3600
TXT"d365mktkey=ZGFU0tlXPekPusNHPo5QQQWpVf0gic0xpuKroNy3NQEx"3600
TXT"d365mktkey=JlXV17lfZjyvWxNje1qiP390ACSKzTxo5mGqZ3V2BmYx"3600
TXT"d365mktkey=PNcDqkW71x8VOUhcE96aGM4l5PYX1gnlRl6ieXUl5eMx"3600
TXT"d365mktkey=Fu49WtSTeClkHtK7S14227RIVpGwwGrzEsO6RVs1I2Ax"3600
TXT"ms-domain-verification=25524f4b-1476-489c-a086-30f4c5016ecc"3600
TXT"ms-domain-verification=1c4e4677-e58f-4117-8d61-e5b2810388c2"3600
TXT"mixpanel-domain-verify=5803bc4c-5bb6-4ce1-8076-753800097373"3600
TXT"sitecore-domain-verification=1d46cb5467624e33a408d14324874088"3600
TXT"ms-domain-verification=478640ad-6524-43d5-86c4-a914804b9e93"3600
TXT"ms-domain-verification=561512fc-b4ba-4ac7-a946-e464c8f49f1b"3600
TXT"_zx2p8gpzv720db2aqmozy4jhwk2nl43"3600
TXT"airtable-verification=79a09e4a8013ff5737798ffb4ea88eee"3600
TXT"1password-site-verification=35ZTURTFFFDC5BW7GFQKRJ77QM"3600
TXT"d365mktkey=8fEQahTresJms7tZGxGFr94T1zDz36oCbUt1LJc99mox"3600
TXT"d365mktkey=heYmJ57sWrwMjCgIG1xRwTREJrQokUIDtBcNfGuxoWQx"3600
TXT"ms-domain-verification=d6545068-89f7-4432-b947-0b137e8a9fe3"3600
TXT"hcp-domain-verification=3ce174a8b9fba88909633ab13eb1d81ce0123454745d66e500052ed84b7248a1"3600
TXT"v=MCPv1; k=ecdsap384; p=As/XxnDWZFxFwHvRZj+HbG5/ImtAeabLkiOWu1h7wCJQFAR216E9HoYQ5Hy6o7StoQ=="3600
TXT"v=MCPv1; k=ecdsap384; p=AoHTKEi2W8L2P8cf9CoDicIxYiuttTkwtIeFOqYCewBGoRZiiF+9/92saUkIDERGAA=="3600
TXT"v=spf1 include:_spf-a.microsoft.com include:_spf-b.microsoft.com include:_spf-c.microsoft.com include:_spf-ssg-a.msft.net include:_spf1-meo.microsoft.com -all"3600
TXT"ms-domain-verification=65f91178-9dfb-41cd-929d-08d1a38ed607"3600
TXT"v=MCPv1; k=ecdsap384; p=Asc8WWov6gsmCCzn4CSrwRuJIh5SqvaitKz/LlTW+SD54lLC52wzcnWhlTI416p2vw=="3600
TXT"liveramp-site-verification=kxcV8fDH_FUNUZQEcAO6lwgim47f_hNLgMP4VG0PF_Q"3600
TXT"v=MCPv1; k=ecdsap384; p=AqXeTHJ/1FCYeuvJ8dc1B+X3uHaa7m2W0s31vzL4opnrJlSaBdtbWTY8Ti5WiZnu9Q=="3600
TXT"v=MCPv1; k=ecdsap384; p=An4mJIFLRys9h1EvjX18SJs5p1uEF5MHcs2JJLYPrI48C5Qt9FpaZEM0sQTV4JvNYw=="3600
TXT"v=MCPv1; k=ecdsap384; p=A/Mf6IKdZzcHfBvpiVz9rkdPTIcCP5IbRDdEkeP3PgXEXF3mNjorahOwaYlMINBF5A=="3600
TXT"v=MCPv1; k=ecdsap384; p=A8qndBCDJGtFF2+3v/IPIMmM0SaVcrJBoSue7rKob6sUeK7QGeFuWkrtvze3AiqUDA=="3600
TXT"zoom-domain-verification=ZOOM_verify_e97a3d385acb4c47b9b924609a280524"3600
TXT"anthropic-domain-verification-phksss=GZrrKDUR4klRLFCvxyOvqcNGE"3600
TXT"v=MCPv1; k=ecdsap384; p=Azw9+u4M8RoH+bxJidKAZzGDmsPkzY1N4cO7rB/uC5x1RBoNfMyBlH/ott0lpo4pOQ=="3600
TXT"dobtdihqagnr18hea8uv1h1mvq"3600
TXT"atlassian-domain-verification=Sn5AwyIdVgkaRaJA/IKj7ZFMnWeCBnppa9bXGLuJvsakRHH4lYoBxS8g7GVlud9M"3600
TXT"openai-domain-verification=dv-sFtCvKOlWoe31gpoSvs7cqsP"3600
TXT"hpe-greenlake-domain-verification=495143304a3330533363357a57684f6335556f316f55654675523541464d3954"3600
TXT"v=MCPv1; k=ecdsap384; p=A5JeyhIFWFj4/epHJwt29GRUSrFwGSwXhrhDMAUSklMhfXjI7gi/ekY/fQSWToZdCw=="3600
TXT"v=MCPv1; k=ecdsap384; p=A/78JIxAOlNwq8f0T/l50w7zhwQFpEuB8/Jz9CafdXNX7ewOluYpS/EEcSmLgxsHXg=="3600
TXT"docker-verification=b912d2f3-8614-4591-962b-9e07dbf7c047"3600
TXT"_ij59qjkrntjw3gpjplj3or17mo3xxvt"3600
TXT"google-site-verification=jwrHU99GU8HSXlRFeywLDZmVawD2DWVCebQ41shKK0M"3600
CAA0 contactemail "caarecordaware@microsoft.com"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1h, NS 2d.
  • ✓ 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: .