ibm.com

Checked 22 October 2026, 09:14 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 6 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-03-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
19 March 1986
Last changed
16 March 2026
Expires
20 March 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net, dns4.p05.nsone.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 2027-03-20 #3
    The registration is valid until 2027-03-20 (148 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

dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net, dns4.p05.nsone.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net, dns4.p05.nsone.net
NS in the zone
dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net, dns4.p05.nsone.net
NameserverAddressesNetwork (AS)Glue
dns1.p05.nsone.net198.51.44.5 2620:4d:4000:6259:7:5:0:1AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns2.p05.nsone.net198.51.45.5 2a00:edc0:6259:7:5::2AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns3.p05.nsone.net198.51.44.69 2620:4d:4000:6259:7:5:0:3AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns4.p05.nsone.net198.51.45.69 2a00:edc0:6259:7:5::4AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net, dns4.p05.nsone.net.
  • ✓ 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 (AS62597 (NSONE - NSONE Inc, 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
  • i
    All nameserver names under .net
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.p05.nsone.net 198.51.44.5NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns1.p05.nsone.net 2620:4d:4000:6259:7:5:0:1NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p05.nsone.net 198.51.45.5NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p05.nsone.net 2a00:edc0:6259:7:5::2NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p05.nsone.net 198.51.44.69NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p05.nsone.net 2620:4d:4000:6259:7:5:0:3NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p05.nsone.net 198.51.45.69NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p05.nsone.net 2a00:edc0:6259:7:5::4NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns1.p05.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns2.p05.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns3.p05.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns4.p05.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9".
    #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 1790595960 · primary dns1.p05.nsone.net

Found

Primary (MNAME)
dns1.p05.nsone.net
Contact (RNAME)
hostmaster.nsone.net
Serial
1790595960
Refresh / retry
43200 s / 7200 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.p05.nsone.net (198.51.44.5)1790595960
dns1.p05.nsone.net (2620:4d:4000:6259:7:5:0:1)1790595960
dns2.p05.nsone.net (198.51.45.5)1790595960
dns2.p05.nsone.net (2a00:edc0:6259:7:5::2)1790595960
dns3.p05.nsone.net (198.51.44.69)1790595960
dns3.p05.nsone.net (2620:4d:4000:6259:7:5:0:3)1790595960
dns4.p05.nsone.net (198.51.45.69)1790595960
dns4.p05.nsone.net (2a00:edc0:6259:7:5::4)1790595960

Checks

  • ✓ Serial 1790595960 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.p05.nsone.net is one of the listed nameservers.
  • ✓ Contact hostmaster@nsone.net #25
    The SOA RNAME hostmaster.nsone.net means hostmaster@nsone.net.
  • ✓ Timestamp serial #26
    The serial 1790595960 is a Unix timestamp (2026-09-28 11:46 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

warn

61 records at the apex

Found

Read from
198.51.44.5:53
TypeValueTTL
SOAdns1.p05.nsone.net. hostmaster.nsone.net. 1790595960 43200 7200 604800 360086400
NSdns1.p05.nsone.net.3600
NSdns2.p05.nsone.net.3600
NSdns3.p05.nsone.net.3600
NSdns4.p05.nsone.net.3600
A184.31.91.1325
AAAA2a02:26f0:480:5b1::383113
AAAA2a02:26f0:480:582::383113
MX5 mx0a-001b2d05.pphosted.com.3600
MX5 mx0b-001b2d05.pphosted.com.3600
TXT"MS=ms61389031"1800
TXT"00D3h000004YkeYEAS"1800
TXT"00d00000000hedieay"1800
TXT"00d50000000c9mweay"1800
TXT"00df40000004784eaa"1800
TXT"40a21f5affe343c6b37e0a5af80dcd93"1800
TXT"yandex-verification: 5f458b477256c50c"1800
TXT"_github-challenge-ibm.ibm.com=2613e984bc"1800
TXT"apple-domain-verification=M3o953J0rN1B0P2a"1800
TXT"google-gws-recovery-domain-verification=42135076"1800
TXT"google-gws-recovery-domain-verification=48225137"1800
TXT"amazonses:79ShwQazteb+WkCt8e297sAC2mwZVRditsrzaoxiHjU="1800
TXT"docker-verification=7c4d4e40-e7ee-4183-94c2-db97d0873269"1800
TXT"docker-verification=846278f4-7e2c-4586-ae26-e1a9f0f0aecd"1800
TXT"mongodb-site-verification=3d0wR0KvanH3yTbll0sXEJ0QGBQffOkv"1800
TXT"mongodb-site-verification=gEevYaKFpagtLmrYxomtpE2QmYwnd29i"1800
TXT"smartsheet-site-validation=I-lI3gCPdvKbKQ6KTki96Ream6Yjs1gU"1800
TXT"onetrust-domain-verification=e7e09cedfb9b4ff386f1274e4c214d55"1800
TXT"adobe-idp-site-verification=5f8adca7-512f-44e1-a5b2-b62c5e3763f2"1800
TXT"google-site-verification=I-empodMpM7n5Px1doUgIaOKHKeIMXXf6k8Ea5ENyO4"1800
TXT"google-site-verification=Jck8mLbYYfCnrmi_nRy4MG2fbUN3UGhC29KdspGLd9Y"1800
TXT"google-site-verification=aH5jG_abrxRKeKZKOrX9CuXlXdFSCQxVkmAVoYwzNcc"1800
TXT"google-site-verification=tzdngH5fWH-k8uQoDVovOFJQZTwaGtDOP6S2cQlOvCs"1800
TXT"h1-domain-verification=m9jGKLYa5hDdU5AHUfK9jrBmWVhx3h9t9ztfDFMaxZfgChvk"1800
TXT"intersight=cfe6f48b59e7428442b9aab04765ca0953e01c480a685ca5cf6939ef9e505532"1800
TXT"Dynatrace-site-verification=76b6b299-fe43-4f31-889b-a8a467193478__8q74sg9dg5udjppn95utrb8bct"1800
TXT"atlassian-domain-verification=WAjTH82C5Zx475WLKAA2nrdlsoA/kN0ej9igrLrED4h15KMHPOm+A5H3GndKAxDC"1800
TXT"atlassian-domain-verification=a32Aj0uoXQRh6QseDFFrlufYlkbeSdok7az3sY0DQNVXpW1Iqj8zlsuXFZgHMojH"1800
TXT"DomainVerification=CYICZMSWT62KDTQWZ1YCKKU763NN36BQJ4TD5BV606K3FLDUR3UOJE58E30FTIVL"1800
TXT"mongodb-site-verification=Gcqpap80hVonXfV2VnYC6AlEr2Z9vvf3"1800
TXT"ms-domain-verification=1adbc779-89ce-47cf-8167-c4e4a3b4a6aa"1800
TXT"figma-domain-verification=6db9259c4472f3e5ba44c7ae284b4f4b8aa0268c0797659a5e1a28ccfe912ddf-1741206863"1800
TXT"atlassian-domain-verification=79ZnqmRPyDwm6b99GAF3ymzBmjtRZU9oCfgMwVMAUGlrPPenDc6esgO62jafAXUI"1800
TXT"intersight=1439768961d2f6d736c38b947d235947681cd817abea13eab3daee9ecbdc6c3d"1800
TXT"asv=e8bb80eeac60e62a4dd07f03d1d36829"1800
TXT"_analyst_ng_validation=f6702989-83f3-42b8-be39-19cf8f1c33f5"1800
TXT"ms-domain-verification=bedcd06e-7e1c-4906-9b6a-b4a1095fa4ed"1800
TXT"smartsheet-site-validation=TaCpXPZ-qFfOgfHXuMrfF8_d6GZjICNl"1800
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all"1800
TXT"jamf-site-verification=CN4bHigc1ZnD6ZQX_2c6XQ"1800
TXT"anthropic-domain-verification-ym2t7s=RPDdVAMpzgbooX0kxhqstuM2D"1800
TXT"atlassian-sending-domain-verification=79afa9af-6e0f-47e6-b636-2786f8772f66"1800
TXT"00D10000000biEb=1TBQ80000000b2n"1800
TXT"figma-domain-verification=b8b3862b529816383e0e7ec9ad2757f8f7b4a0f4da290136796f1aa36d558841-1785230801"1800
TXT"wework-site-verification=hhWLSbG4qiaKhsXU"1800
TXT"google-site-verification=ewe2QcP5aMj3DKuSfxscZME5wip4EpoTxCXPNvr0-J0"1800
TXT"facebook-domain-verification=7w4exj2revwpv5u708s6bji5j6tswy"1800
TXT"coursera-domain-verification=To0Ej5CrewXrC0FcCjVxXG1lTcLLJQjvrW2gdUt8rCxFxTGMdA0vA54nUlgLfbyO"1800
TXT"coursera-domain-verification=bz3rkMKt9OsiG09FQT5PlvATkPnm2HJINXArQXYjHweyVbQJXYe2rn0zSAd39gMi"1800
TXT"figma-domain-verification=bd98b636892b35b24256b111b9ab2d2221541cb27c1f3d0e5435fdbf22fdcc6c-1790738651"1800
TXT"verification_token=xVF82aSJI1ni919jo4Ill3F3o"1800

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (5s), AAAA (13s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
    #32
  • ✓ 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
  • 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