xerox.com

Checked 22 October 2026, 11:34 UTC · via 8.8.8.8
✗Problems found
26 passed 4 warnings 1 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-01-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
9 January 1986
Last changed
16 July 2025
Expires
8 January 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
adrastea.xerox.com, ash.xerox.com, carme.xerox.com, gum.xerox.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 2027-01-08 #3
    The registration is valid until 2027-01-08 (77 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

adrastea.xerox.com, ash.xerox.com, carme.xerox.com, gum.xerox.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
adrastea.xerox.com, ash.xerox.com, carme.xerox.com, gum.xerox.com
NS in the zone
adrastea.xerox.com, ash.xerox.com, athena.xerox.com, betelgeuse.xerox.com, carme.xerox.com, curly.xerox.com, gum.xerox.com, shemp.xerox.com
NameserverAddressesNetwork (AS)Glue
adrastea.xerox.com13.13.138.33AS22390 XEROX-WB - XEROX CORPORATION, US13.13.138.33
ash.xerox.com13.8.138.10AS26662 XEROX-WV - XEROX CORPORATION, US13.8.138.10
athena.xerox.com (zone only)13.16.138.10AS26662 XEROX-WV - XEROX CORPORATION, US-
betelgeuse.xerox.com (zone only)13.20.138.10AS7046 RFC2270-UUNET-CUSTOMER - Verizon Business, US-
carme.xerox.com13.13.138.34AS22390 XEROX-WB - XEROX CORPORATION, US13.13.138.34
curly.xerox.com (zone only)13.13.138.12AS22390 XEROX-WB - XEROX CORPORATION, US-
gum.xerox.com13.8.138.11AS26662 XEROX-WV - XEROX CORPORATION, US13.8.138.11
shemp.xerox.com (zone only)13.8.138.8AS26662 XEROX-WV - XEROX CORPORATION, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to adrastea.xerox.com, ash.xerox.com, carme.xerox.com, gum.xerox.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: athena.xerox.com, betelgeuse.xerox.com, curly.xerox.com, shemp.xerox.com. adrastea.xerox.com, ash.xerox.com, athena.xerox.com, betelgeuse.xerox.com, carme.xerox.com, curly.xerox.com, gum.xerox.com, shemp.xerox.com report NS adrastea.xerox.com ash.xerox.com athena.xerox.com betelgeuse.xerox.com carme.xerox.com curly.xerox.com gum.xerox.com shemp.xerox.com.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: adrastea.xerox.com, ash.xerox.com, carme.xerox.com, gum.xerox.com.
  • ✓ 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 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS22390 (XEROX-WB - XEROX CORPORATION, US): 3 addresses; AS26662 (XEROX-WV - XEROX CORPORATION, US): 4 addresses; AS7046 (RFC2270-UUNET-CUSTOMER - Verizon Business, US): 1 address.
  • i
    All nameserver names under .com
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
adrastea.xerox.com 13.13.138.33NOERROR, 136 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
ash.xerox.com 13.8.138.10NOERROR, 176 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
athena.xerox.com 13.16.138.10NOERROR, 17 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
betelgeuse.xerox.com 13.20.138.10NOERROR, 26 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
carme.xerox.com 13.13.138.34NOERROR, 196 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
curly.xerox.com 13.13.138.12NOERROR, 139 ms, authoritativenono / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
gum.xerox.com 13.8.138.11NOERROR, 175 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14
shemp.xerox.com 13.8.138.8NOERROR, 175 ms, authoritativenono / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.14

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: adrastea.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; ash.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; athena.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; betelgeuse.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; carme.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; curly.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; gum.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14"; shemp.xerox.com: "9.11.36-RedHat-9.11.36-16.el8_10.14". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: curly.xerox.com (13.13.138.12): dial tcp 13.13.138.12:53: connect: connection refused; shemp.xerox.com (13.8.138.8): dial tcp 13.8.138.8:53: connect: connection refused.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2017042855 · primary adrastea.xerox.com

Found

Primary (MNAME)
adrastea.xerox.com
Contact (RNAME)
hostmaster.xerox.com
Serial
2017042855
Refresh / retry
3600 s / 900 s
Expire
360000 s
Negative TTL
14400 s

Serial per nameserver

NameserverSerial
adrastea.xerox.com (13.13.138.33)2017042855
ash.xerox.com (13.8.138.10)2017042855
athena.xerox.com (13.16.138.10)2017042855
betelgeuse.xerox.com (13.20.138.10)2017042855
carme.xerox.com (13.13.138.34)2017042855
curly.xerox.com (13.13.138.12)2017042855
gum.xerox.com (13.8.138.11)2017042855
shemp.xerox.com (13.8.138.8)2017042855

Checks

  • ✓ Serial 2017042855 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    expire 100h is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 15m, expire 100h, negative TTL 4h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver adrastea.xerox.com is one of the listed nameservers.
  • ✓ Contact hostmaster@xerox.com #25
    The SOA RNAME hostmaster.xerox.com means hostmaster@xerox.com.
  • ✓ Date-based serial #26
    The serial 2017042855 follows the YYYYMMDDnn convention (2017-04-28).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
1 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
51724RSASHA256 (8)SHA256 62967CD0C76A3ECA…yes

DNSKEY in the zone

Key tagRoleAlgorithm
36420ZSK (256)RSASHA256 (8)
51724KSK (257)RSASHA256 (8)

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 51724 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-01 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-01 07:33 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

53 records at the apex

Found

Read from
13.13.138.33:53
TypeValueTTL
SOAadrastea.xerox.com. hostmaster.xerox.com. 2017042855 3600 900 360000 1440086400
NSgum.xerox.com.14400
NScurly.xerox.com.14400
NScarme.xerox.com.14400
NSadrastea.xerox.com.14400
NSathena.xerox.com.14400
NSshemp.xerox.com.14400
NSash.xerox.com.14400
NSbetelgeuse.xerox.com.14400
A13.8.148.11300
A13.13.40.11300
MX50 mx1.xerox.iphmx.com.14400
MX50 mx2.xerox.iphmx.com.14400
TXT"wiz-domain-verification=50e8c15c260630d8612c9652843dd010325682cd653cf0d996bceaf517798c4a"300
TXT"atlassian-domain-verification=xNjY3El5LXbHIIFbfZKQaBxidFMyigI0zC9hFFF72Bqc7gEndCemG9Tmkuv2AisI"300
TXT"monday-com-verification=RTIiflOQpEiCwByU2cwHWjvvaCVVwNjprLV1vSDuM-U"300
TXT"verification_token=U5QWH8sSeEsYDr93aMcfMPd3I"300
TXT"docker-verification=01eb9b68-48f6-4fef-983c-c1ca8a7c166c"300
TXT"google-site-verification=_TXJIUt1VESW6hNVUMWXjP6LY2Rhm3KXDqG622PjcsQ"300
TXT"MS=ms69937247"300
TXT"intersight=ab5bad26a3b47cb1a8858f74bb8e398f9deb26626e16e98590ee40f5952f11f3"300
TXT"jamf-site-verification=xUbrpqTTnKUBPaPLkO01zw"300
TXT"adobe-sign-verification=eca014782328d616b400ba2dc33ee480"300
TXT"atlassian-domain-verification=iHnC7jWGpEexY0C6pniDayOYavXl51LXTWY8Qz2GS8ZA02Y7crYUu7y8Gy2WLcWK"300
TXT"google-site-verification=i70agOHhpDybanmNYjbgvtz68pnSNAVNhCoq8sOnPDA"300
TXT"pandadoc-domain-verification=GTffXF2BZ7C9TzT2TMPfVR"300
TXT"cisco-ci-domain-verification=5189f93c6104ca078b704b53bbda5c79ee635e479431967841b7f1ceed59577e"300
TXT"globalsign-domain-verification=404484575de68de025ead67e61bdd594"300
TXT"docusign=0cd50753-4abe-44e3-81df-9607b303ed1f"300
TXT"jamf-site-verification=06aiArdDOtB10ORj1dSClQ"300
TXT"webexdomainverification.4C675B8BD27DB136E053AB06FC0A3F65=f46c9f8f-27fe-4399-a063-46798885439c"300
TXT"globalsign-domain-verification=91E33A0C7638872C1CF950E2A564F01F"300
TXT"docusign-c1f086c5-10f1-4fa7-8a6d-fca5512d732f"300
TXT"umacf5dltsUy81OlT14W8R76dh5dLxGs/B3p3YRVQGsuDXbu/pIu9MWmZ9TJgM9tWwYaPwl8Ndrf6Hqqed4Lew=="300
TXT"anthropic-domain-verification-ycnhc1=M4WbPIfzdxZQGlSdvEzF93s5d"300
TXT"amazonses:BbvpRIWAvvVQijs0zvbkm5hWu9pJ9sRS/R3fnguzUp4="300
TXT"6ZpwCG3DkW/sI5iW0PrECx4iSQF1Yj2rC2USrsT7LaZ0wVbb70bfJXyLDVRZEDRwMRPij/duzfFcwX9EjJ1Ylw=="300
TXT"google-site-verification=gIiGv288UuyOWc6MRrRJNI9ZX96wxqBbsdxIv3gAGZQ"300
TXT"google-site-verification=bijxfKyc1IiAEC6I-Y6EfLH8zV0-iCu7oyDsbakUUcI"300
TXT"google-site-verification=Ggk7Rg_jFyfh5yiNssP4KvydqZZIYntXYGsDmCyHUQg"300
TXT"webexdomainverification.LS2L=3821c6b9-1edb-4162-9305-cf6fac2d2d9a"300
TXT"globalsign-domain-verification=cce2fca7f88257f0e256f0c3ef70177f"300
TXT"webexdomainverification.4C675B8BD27FB136E053AB06FC0A3F65=e072993c-c14a-4a6f-8942-47788297c063"300
TXT"google-site-verification=SqEDLxkH1C2tIoVfcgUK5IPPplF7H9Q4PDXSLBQ_mSY"300
TXT"CKIOJONMZT._autotask.xerox.com"300
TXT"apple-domain-verification=yGDgIeYqDyfSbtrX"300
TXT"google-site-verification=FTZ_4d8T6qx3IXTiRaK4xnIRRe3k23DJhm802IUTlhM"300
TXT"h1-domain-verification=u798srhkHsguWuuKJ9jEF7jaY8rMRvo1jEGp3jAG83kBZdZN"300
TXT"google-site-verification=AG7vu8mYz2Mjd2OxV2jMmHRT5RLlI3vfZ4Pwzx_eXyo"300
TXT"webexdomainverification.4d2abde4da5011c7e053ad06fc0ab17f=1023409a-d0d8-4e32-aa93-c802970feb53"300
TXT"v=spf1 include:_iphmx.xerox.com include:_iphmx2.xerox.com include:spf.protection.outlook.com include:spf.constantcontact.com include:_spf.salesforce.com include:nw026.com include:mail.zendesk.com include:autotask.net " "ip4:141.193.184.64/26 ip4:141.193.185.128/25 ip4:18.208.124.128/25 ip4:141.193.184.128/25 ip4:141.193.185.64/26 ip4:158.247.16.0/20 ip4:3.93.157.0/24 ip4:216.139.64.0/19 ip4:108.179.144.0/20 ip4:54.174.60.0/23 ip4:143.244.80.0/20 ip4:54.174.59.0/24 " "ip4:54.174.63.0/24 ip4:3.210.190.0/24 ip4:141.193.184.32/27 ip4:54.174.52.0/24 ip4:139.180.17.0/24 ip4:141.193.185.32/27 ip4:54.174.57.0/24 ~all"300
TXT"Dynatrace-site-verification=2c111e48-3773-4f10-bacd-ef1aac74947b__pqs79pq5uhf5sf2mm83lal92o6"300
TXT"google-site-verification=6XsB1W-0Zx4r_yjEzo7NYJ6EbSkrsOMucak3mRPj2P4"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 4h, NS 4h. The NS TTL at the parent is 2d and in the zone 4h; resolvers may use either.
  • ✓ 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