unisys.com

Checked 22 October 2026, 11:15 UTC · via 8.8.8.8
!Passed with warnings
29 passed 1 warning 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2026-12-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
11 December 1986
Last changed
13 August 2025
Expires
10 December 2026
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1209.awsdns-23.org, ns-1785.awsdns-31.co.uk, ns-536.awsdns-03.net, ns-87.awsdns-10.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 2026-12-10 #3
    The registration is valid until 2026-12-10 (48 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1209.awsdns-23.org, ns-1785.awsdns-31.co.uk, ns-536.awsdns-03.net, ns-87.awsdns-10.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1209.awsdns-23.org, ns-1785.awsdns-31.co.uk, ns-536.awsdns-03.net, ns-87.awsdns-10.com
NS in the zone
ns-1209.awsdns-23.org, ns-1785.awsdns-31.co.uk, ns-536.awsdns-03.net, ns-87.awsdns-10.com
NameserverAddressesNetwork (AS)Glue
ns-1209.awsdns-23.org205.251.196.185 2600:9000:5304:b900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1785.awsdns-31.co.uk205.251.198.249 2600:9000:5306:f900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-536.awsdns-03.net205.251.194.24 2600:9000:5302:1800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-87.awsdns-10.com205.251.192.87 2600:9000:5300:5700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.87 2600:9000:5300:5700::1

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1209.awsdns-23.org, ns-1785.awsdns-31.co.uk, ns-536.awsdns-03.net, ns-87.awsdns-10.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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, 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
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1209.awsdns-23.org 205.251.196.185NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1209.awsdns-23.org 2600:9000:5304:b900::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1785.awsdns-31.co.uk 205.251.198.249NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1785.awsdns-31.co.uk 2600:9000:5306:f900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-536.awsdns-03.net 205.251.194.24NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-536.awsdns-03.net 2600:9000:5302:1800::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-87.awsdns-10.com 205.251.192.87NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-87.awsdns-10.com 2600:9000:5300:5700::1NOERROR, 9 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2026102204 · primary ns-1785.awsdns-31.co.uk

Found

Primary (MNAME)
ns-1785.awsdns-31.co.uk
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
2026102204
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1209.awsdns-23.org (205.251.196.185)2026102204
ns-1209.awsdns-23.org (2600:9000:5304:b900::1)2026102204
ns-1785.awsdns-31.co.uk (205.251.198.249)2026102204
ns-1785.awsdns-31.co.uk (2600:9000:5306:f900::1)2026102204
ns-536.awsdns-03.net (205.251.194.24)2026102204
ns-536.awsdns-03.net (2600:9000:5302:1800::1)2026102204
ns-87.awsdns-10.com (205.251.192.87)2026102204
ns-87.awsdns-10.com (2600:9000:5300:5700::1)2026102204

Checks

  • ✓ Serial 2026102204 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1785.awsdns-31.co.uk is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Date-based serial #26
    The serial 2026102204 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
22 October 2026

DNSKEY in the zone

Key tagRoleAlgorithm
52385ZSK (256)ECDSAP256SHA256 (13)
17393ZSK (256)ECDSAP256SHA256 (13)
10607KSK (257)ECDSAP256SHA256 (13)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 2h0m0s and created on demand; the current one was made at 2026-10-22 10:15 UTC and expires at 2026-10-22 12:20 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

info

40 records at the apex

Found

Read from
205.251.196.185:53
TypeValueTTL
SOAns-1785.awsdns-31.co.uk. awsdns-hostmaster.amazon.com. 2026102204 7200 900 1209600 86400300
NSns-1209.awsdns-23.org.172800
NSns-1785.awsdns-31.co.uk.172800
NSns-536.awsdns-03.net.172800
NSns-87.awsdns-10.com.172800
A217.114.94.2300
MX10 mxa-004a6501.gslb.pphosted.com.300
MX10 mxb-004a6501.gslb.pphosted.com.300
TXT"1p9popalp59muvb37kalgpje8q"60
TXT"233451p9popalp59muvb37kalgpje8q23"60
TXT"XrrBG4fWwW8cXF6nsuN2FlXqmw"60
TXT"_6lhqvcojwzyv8961u866x2jg2tzqe38"60
TXT"_kj5sb8pux1mhzyqqfk2jjdlmy0ej1vf"60
TXT"anthropic-domain-verification-dj1gf1=AFdUnkk2wOaVwyaEn7dkAMn99"60
TXT"apple-domain-verification=fkSUH1JLycSoXD4N"60
TXT"appspace-domain-verification=9b7f816fc78ff8ce4a9d3611dff5bc948cf2017b7d919054a5cc2ff24a56cf48"60
TXT"atlassian-domain-verification=18PI0nIufqK0atI2PZNQ7VxRZQPaDktVVitmXTksj8CtNtZffjQM2pG2R/KQBbRL"60
TXT"atlassian-domain-verification=ApqQ1isx3M6T8kSV9HIT4L6y62C0d6EOHjHRNOBFvE/Ub5Je46x06SD1yv/h0Iaw"60
TXT"bettercomp-verify=3d11b0d45c2968c9162728b581d2696780564361963204180167eadf7d7b7d0d"60
TXT"canva-site-verification=q78vBDaN11ymaQEJGpSlaA"60
TXT"citrix.mobile.ads.otp=6it5mlgqv9e20uy85bci7s"60
TXT"cloudflare-verify.unisys.com=272627761-387491209"60
TXT"dDVp+B9qdalpp25S5EGRjJKKh+TaFye6b70o/PfCCLzWSR7J6oQBve++SQGQNC4bKwxi6uK9Mnt7o970DaRI7w=="60
TXT"dell-technologies-domain-verification=unisys.com_d441d49a-af1c-4f4a-bc23-58ca01e01492_1773857993"60
TXT"docker-verification=f8af4f20-5ecf-445f-bd97-77b2b1275051"60
TXT"docusign=2d39b345-6c39-4b24-bccd-741c0a86a78e"60
TXT"docusign=5e21549e-136e-42d5-a4f1-04af54e0b4aa"60
TXT"fastly-domain-delegation-AvF86eDtBuvK11Q-20250206"60
TXT"google-gws-recovery-domain-verification=58857297"60
TXT"google-site-verification=Y4vXAyw3LwY-WZenCcQQ7XBOd-h6f5SttJhmny9-NYE"60
TXT"google-site-verification=ZJgA6T45IxxIyjT1pNcRNPnGxTEm1ceNEceDSxnAUCg"60
TXT"google-site-verification=ei5GozWezWwmfANlU7HPQlxf05mh-3ERfYTcsUmo3gk"60
TXT"ms-domain-verification=2509962e-b31d-43a5-9f1a-e5e652caf85b"60
TXT"msfpkey=6uolx0vuyhgz574acc1ltekdk"60
TXT"n/raNPnQwSqHrWFuU9GTnYS4dLpHX9x18nEz/UlpdCfs6wOyUeSQbTtj/XXwjlMy5KX/sooWq4+iWU+pifOlig=="60
TXT"neat-pulse-domain-verification-LXP7jwv=81b1fcaf-5906-45da-b820-2f56c7f6e6a6"60
TXT"nintex.621700c7f05a4b007007525a"60
TXT"onetrust-domain-verification=92d96181623847d9a5ce4b70607a6c06"60
TXT"twilio-domain-verification=b8a578dde6a1c4de9e9cfdfd0c26d595"60
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com include:spf.protection.outlook.com -all"60

Checks

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