sltrib.com

Checked 22 October 2026, 10:44 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · Network Solutions, LLC · expires 2031-03-02

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
1 March 1994
Last changed
1 January 2026
Expires
2 March 2031
Status
client transfer prohibited
Registry nameservers
ns.xmission.com, ns1.xmission.com, ns2.xmission.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 2031-03-02 #3
    The registration is valid until 2031-03-02 (1591 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns.xmission.com, ns1.xmission.com, ns2.xmission.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns.xmission.com, ns1.xmission.com, ns2.xmission.com
NS in the zone
ns.xmission.com, ns1.xmission.com, ns2.xmission.com, ns3.xmission.com
NameserverAddressesNetwork (AS)Glue
ns.xmission.com166.70.254.2 2607:fa18::11AS6315 XMISSION - XMission, L.C., US AS6315 XMISSION - XMission, L.C., US166.70.254.2 2607:fa18::11
ns1.xmission.com204.228.159.2 2607:fa18:0:a::aAS6315 XMISSION - XMission, L.C., US AS6315 XMISSION - XMission, L.C., US204.228.159.2 2607:fa18:0:a::a
ns2.xmission.com207.115.80.155 2001:560:4403:ca5c:aded:beef:deba:c1eAS18530 ISOMEDIA-1 - Isomedia, Inc., US AS18530 ISOMEDIA-1 - Isomedia, Inc., US2001:560:4403:ca5c:aded:beef:deba:c1e 207.115.80.155
ns3.xmission.com (zone only)178.104.102.15 2a01:4f8:1c18:23d7::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns.xmission.com, ns1.xmission.com, ns2.xmission.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns3.xmission.com. ns.xmission.com, ns1.xmission.com, ns2.xmission.com, ns3.xmission.com report NS ns.xmission.com ns1.xmission.com ns2.xmission.com ns3.xmission.com.
    #7
  • ✓ 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 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS18530 (ISOMEDIA-1 - Isomedia, Inc., US): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS6315 (XMISSION - XMission, L.C., US): 4 addresses.
  • 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.xmission.com 166.70.254.2NOERROR, 146 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.24.04.1-Ubuntu
ns.xmission.com 2607:fa18::11NOERROR, 168 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.24.04.1-Ubuntu
ns1.xmission.com 204.228.159.2NOERROR, 144 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.22.04.2-Ubuntu
ns1.xmission.com 2607:fa18:0:a::aNOERROR, 168 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.22.04.2-Ubuntu
ns2.xmission.com 207.115.80.155NOERROR, 158 ms, authoritativenoyes / yesrefused9.18.18-0ubuntu0.22.04.2-Ubuntu
ns2.xmission.com 2001:560:4403:ca5c:aded:beef:deba:c1eNOERROR, 146 ms, authoritativenoyes / yesrefused9.18.18-0ubuntu0.22.04.2-Ubuntu
ns3.xmission.com 178.104.102.15NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.30-1~deb13u1-Debian
ns3.xmission.com 2a01:4f8:1c18:23d7::1NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.30-1~deb13u1-Debian

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: ns.xmission.com: "9.18.30-0ubuntu0.24.04.1-Ubuntu"; ns1.xmission.com: "9.18.30-0ubuntu0.22.04.2-Ubuntu"; ns2.xmission.com: "9.18.18-0ubuntu0.22.04.2-Ubuntu"; ns3.xmission.com: "9.20.30-1~deb13u1-Debian". Hide or replace the version string.
    #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 2026102100 · primary ns.xmission.com

Found

Primary (MNAME)
ns.xmission.com
Contact (RNAME)
domains.xmission.com
Serial
2026102100
Refresh / retry
10800 s / 1800 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.xmission.com (166.70.254.2)2026102100
ns.xmission.com (2607:fa18::11)2026102100
ns1.xmission.com (204.228.159.2)2026102100
ns1.xmission.com (2607:fa18:0:a::a)2026102100
ns2.xmission.com (207.115.80.155)2026102100
ns2.xmission.com (2001:560:4403:ca5c:aded:beef:deba:c1e)2026102100
ns3.xmission.com (178.104.102.15)2026102100
ns3.xmission.com (2a01:4f8:1c18:23d7::1)2026102100

Checks

  • ✓ Serial 2026102100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.xmission.com is one of the listed nameservers.
  • ✓ Contact domains@xmission.com #25
    The SOA RNAME domains.xmission.com means domains@xmission.com.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

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

17 records at the apex

Found

Read from
166.70.254.2:53
TypeValueTTL
SOAns.xmission.com. domains.xmission.com. 2026102100 10800 1800 3600000 86400300
NSns3.xmission.com.300
NSns1.xmission.com.300
NSns.xmission.com.300
NSns2.xmission.com.300
A76.223.6.18300
A13.248.129.228300
MX10 alt4.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
TXT"mail.sltrib.com."300
TXT"Validity-Domain-Verification=Z+STTbvvLcYaP5dj4JDDL5AXzv4="300
TXT"v=spf1 ip4:13.110.6.208/28 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:35.184.254.92 ip4:104.196.182.217 ip4:104.196.215.101 ip4:104.198.207.207 ip4:35.203.94.235 ip4:35.203.3.51 include:spf.mandrillapp.com include:_spf.google.com inclu" "de:spf.client.mirabeltechnologies.com ip4:91.216.18.0/24 ip4:52.6.112.187 ~all"300
TXT"google-site-verification=nHYZSFG8tf-3BK_yykBHNynESO_y_IUFlHkocdGxBtg"300
TXT"yahoo-verification-key=4tG7Hfbd+ymfRk5acPjcu/WlLdeWb0WBMHQwDLd+wsI="300

Checks

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