lexmark.com

Checked 22 October 2026, 09:35 UTC · via 8.8.8.8
!Passed with warnings
29 passed 1 warning 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-01-13

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
14 January 1992
Last changed
9 January 2026
Expires
13 January 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.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 2027-01-13 #3
    The registration is valid until 2027-01-13 (82 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.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net
NS in the zone
dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net
NameserverAddressesNetwork (AS)Glue
dns1.p01.nsone.net198.51.44.1 2620:4d:4000:6259:7:1:0:1AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns2.p01.nsone.net198.51.45.1 2a00:edc0:6259:7:1::2AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns3.p01.nsone.net198.51.44.65 2620:4d:4000:6259:7:1:0:3AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns4.p01.nsone.net198.51.45.65 2a00:edc0:6259:7:1::4AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.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.p01.nsone.net 198.51.44.1NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns1.p01.nsone.net 2620:4d:4000:6259:7:1:0:1NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p01.nsone.net 198.51.45.1NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p01.nsone.net 2a00:edc0:6259:7:1::2NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p01.nsone.net 198.51.44.65NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p01.nsone.net 2620:4d:4000:6259:7:1:0:3NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p01.nsone.net 198.51.45.65NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p01.nsone.net 2a00:edc0:6259:7:1::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.p01.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns2.p01.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns3.p01.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns4.p01.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 1655394017 · primary dns1.p01.nsone.net

Found

Primary (MNAME)
dns1.p01.nsone.net
Contact (RNAME)
hostmaster.nsone.net
Serial
1655394017
Refresh / retry
83000 s / 10000 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.p01.nsone.net (198.51.44.1)1655394017
dns1.p01.nsone.net (2620:4d:4000:6259:7:1:0:1)1655394017
dns2.p01.nsone.net (198.51.45.1)1655394017
dns2.p01.nsone.net (2a00:edc0:6259:7:1::2)1655394017
dns3.p01.nsone.net (198.51.44.65)1655394017
dns3.p01.nsone.net (2620:4d:4000:6259:7:1:0:3)1655394017
dns4.p01.nsone.net (198.51.45.65)1655394017
dns4.p01.nsone.net (2a00:edc0:6259:7:1::4)1655394017

Checks

  • ✓ Serial 1655394017 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 23h3m20s, retry 2h46m40s, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.p01.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 1655394017 is a Unix timestamp (2022-06-16 15:40 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
23 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
48553ECDSAP256SHA256 (13)SHA256 C1F39653A2140A9F…yes

DNSKEY in the zone

Key tagRoleAlgorithm
48553KSK (257)ECDSAP256SHA256 (13)
12196ZSK (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 48553 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 26h0m0s and created on demand; the current one was made at 2026-10-22 08:35 UTC and expires at 2026-10-23 10:35 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

42 records at the apex

Found

Read from
198.51.44.1:53
TypeValueTTL
SOAdns1.p01.nsone.net. hostmaster.nsone.net. 1655394017 83000 10000 1209600 36003600
NSdns1.p01.nsone.net.21600
NSdns2.p01.nsone.net.21600
NSdns3.p01.nsone.net.21600
NSdns4.p01.nsone.net.21600
A184.25.51.4011
A184.25.51.4911
AAAA2a02:26f0:1700:15::b856:fb9b20
AAAA2a02:26f0:1700:15::b856:fb9d20
MX1 lexmark-com.mail.protection.outlook.com.86400
TXT"v=spf1 redirect=_spf.lexmark.com"3600
TXT"adobe-idp-site-verification=df7e23af-2214-4236-bad7-e2014582ee6e"3600
TXT"MS=ms41336784"3600
TXT"MS=E7D8548A4401D79DEC9BDA80BF2CA7B315489F73"3600
TXT"google-site-verification=2Do5RglXmu3yHBMWtxtHfuxzbJShuClBjB7P3G6Xtc4"3600
TXT"google-site-verification=pSXW3iqUbbG1lFK_dIQozsu25oX4trjS3QEGPFqrhzE"3600
TXT"adobe-sign-verification=546af84291ad1bb9ba346219ad5cb326"3600
TXT"apple-domain-verification=p2zxFex5GDmfXk4D"3600
TXT"google-site-verification=iJh53LT2G69YjXYqv0JHPthTvJdOqCGZJNnXBDVHEGg"3600
TXT"onetrust-domain-verification=7c115b404c104d5ba461583227666f6e"3600
TXT"atlassian-domain-verification=1IShFiKR8u4CyPXMozHifRV0hOdXzs3HYvg/ZbYd9ukZMCYztSHJnmeafe46NDSw"3600
TXT"miro-verification=0434ba0a9d1d13308b7becb55a34f4f6cd561a75"3600
TXT"facebook-domain-verification=u7q5m90pi7eou9wkwbgoli9x3fc26g"3600
TXT"google-site-verification=USb6mI0hXk3nBXqN22-RTBGpbbds0cc8MM3cDMm-8wk"3600
TXT"docker-verification=05febd14-9d58-4ced-9352-1f5e8de85bdc"3600
TXT"google-site-verification=KhfCEEJ5agh5b0fxccKV33da-9DAm2IJKFaEsrsmig4"3600
TXT"zoho-verification=zb35756448.zmverify.zoho.com"3600
TXT"google-site-verification=dGiYCjxFEwNF77x1m7eH5Xzaz1InycbJxUTR9ngeyX8"3600
TXT"vmware-cloud-verification-1c2a52f8-1d7e-467e-a7ae-fa93155d49ae"3600
TXT"_34047px5yqk0fvm92imyhi8wdhy2kp8"3600
TXT"_aa44mwqlio3m1xdrlnxz0m7v9jn1c57"3600
TXT"_fwuh35xy5phxdz1b2zts3oernbatamo"3600
TXT"_msqgy6rxju3mj05pr3ogjnbdrbe5etk"3600
TXT"wiz-domain-verification=eda24e34e1d928db49db341850caf7870cf6b4235855bdc7677e8b3cf71ad84c"3600
TXT"infoblox-domain-mastery=d9a3f44f9e0bb3154dc878f967c25f45088a7fcdab8bbd44c3a9ccffb662c607dc"3600
TXT"anthropic-domain-verification-pvfew0=kSbHfCVFEbMsLX0jE2QJ2nPkM"3600
TXT"jamf-site-verification=t83lM4KXUw6vFlVdTwxBEA"3600
TXT"_mdyznirh8fbinah5mbn748uzl1gd856"3600
CAA0 issue "digicert.com"86400
CAA0 issue "amazonaws.com"86400
CAA0 iodef "mailto:hostmaster@lexmark.com"86400
CAA0 issue "letsencrypt.org"86400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (11s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 6h; resolvers may use either.
    #32
  • ✓ 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: digicert.com, amazonaws.com, letsencrypt.org.