oxygen.com

Checked 22 October 2026, 10:11 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-09-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
10 September 1998
Last changed
25 March 2026
Expires
9 September 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
pdns129.ultradns.biz, pdns129.ultradns.com, pdns129.ultradns.net, pdns129.ultradns.org
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 2027-09-09 #3
    The registration is valid until 2027-09-09 (321 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

info

pdns129.ultradns.biz, pdns129.ultradns.com, pdns129.ultradns.net, pdns129.ultradns.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
pdns129.ultradns.biz, pdns129.ultradns.com, pdns129.ultradns.net, pdns129.ultradns.org
NS in the zone
pdns129.ultradns.biz, pdns129.ultradns.com, pdns129.ultradns.net, pdns129.ultradns.org
NameserverAddressesNetwork (AS)Glue
pdns129.ultradns.biz156.154.66.129 2610:a1:1015::a5AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns129.ultradns.com156.154.64.129 2001:502:f3ff::a5AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US156.154.64.129 2001:502:f3ff::a5
pdns129.ultradns.net156.154.65.129 2610:a1:1014::a5AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns129.ultradns.org156.154.67.129 2001:502:4612::a5AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to pdns129.ultradns.biz, pdns129.ultradns.com, pdns129.ultradns.net, pdns129.ultradns.org.
  • ✓ 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 (AS12008 (VERCARA - Vercara, LLC, 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 .biz, .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
pdns129.ultradns.biz 156.154.66.129NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.biz 2610:a1:1015::a5NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.com 156.154.64.129NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.com 2001:502:f3ff::a5NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.net 156.154.65.129NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.net 2610:a1:1014::a5NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.org 156.154.67.129NOERROR, 37 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns129.ultradns.org 2001:502:4612::a5NOERROR, 49 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

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: pdns129.ultradns.biz: "UltraDNS Nameserver"; pdns129.ultradns.com: "UltraDNS Nameserver"; pdns129.ultradns.net: "UltraDNS Nameserver"; pdns129.ultradns.org: "UltraDNS Nameserver".
    #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

warn

serial 2014091967 · primary pdns129.ultradns.net

Found

Primary (MNAME)
pdns129.ultradns.net
Contact (RNAME)
domain\.admin.versantmedia.com
Serial
2014091967
Refresh / retry
900 s / 3600 s
Expire
2592000 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
pdns129.ultradns.biz (156.154.66.129)2014091967
pdns129.ultradns.biz (2610:a1:1015::a5)2014091967
pdns129.ultradns.com (156.154.64.129)2014091967
pdns129.ultradns.com (2001:502:f3ff::a5)2014091967
pdns129.ultradns.net (156.154.65.129)2014091967
pdns129.ultradns.net (2610:a1:1014::a5)2014091967
pdns129.ultradns.org (156.154.67.129)2014091967
pdns129.ultradns.org (2001:502:4612::a5)2014091967

Checks

  • ✓ Serial 2014091967 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 15m is outside 20m–1d; retry 1h should be shorter than refresh 15m. Current values: refresh 15m, retry 1h, expire 30d, negative TTL 15m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver pdns129.ultradns.net is one of the listed nameservers.
  • ✓ Contact domain.admin@versantmedia.com #25
    The SOA RNAME domain\.admin.versantmedia.com means domain.admin@versantmedia.com.
  • ✓ Date-based serial #26
    The serial 2014091967 follows the YYYYMMDDnn convention (2014-09-19).

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

info

22 records at the apex

Found

Read from
156.154.66.129:53
TypeValueTTL
SOApdns129.ultradns.net. domain\.admin.versantmedia.com. 2014091967 900 3600 2592000 90099
NSpdns129.ultradns.biz.86400
NSpdns129.ultradns.com.86400
NSpdns129.ultradns.net.86400
NSpdns129.ultradns.org.86400
A76.223.34.1247200
A13.248.160.1377200
MX10 mxa-00a17301.gslb.pphosted.com.7200
MX10 mxb-00a17301.gslb.pphosted.com.7200
MX20 mx0a-00a17301.pphosted.com.7200
MX20 mx0b-00a17301.pphosted.com.7200
TXT"MS=ms28948922"3600
TXT"_6y2s7e5162i2mpmraq5jozur3hzhqpe"3600
TXT"_pcrne00dgm6talakf0o9iplh8tetflg"3600
TXT"_x1iaktgovhab5diaekswfxn5c5xnwhw"3600
TXT"dropbox-domain-verification=s7cdtsm7ch0g"3600
TXT"amazonses:QLZnPD8EgurFfinE2vC1B87M5nDEkwX7Qf46DVuEQn4="3600
TXT"amazonses:pZq3IG2utBr37hF9Zqmaa+UZruRJlYdDs7XV0A+AH60="3600
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"3600
TXT"google-site-verification=FWPzgR2tNH-G_C9Reooy-HpIkwUxpt26CAz__8oPWd8"3600
TXT"google-site-verification=YiJIX6Icl0ZJb1FVBUevvBFvqXjCRnRMqS9Ej6IdOG8"3600
TXT"google-site-verification=lyZFf8dBuiMSXohV77iG21jD7GyQPSJk13EeDhlx4no"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, MX 2h, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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