intensedebate.com

Checked 22 October 2026, 09:21 UTC · via 8.8.8.8
!Passed with warnings
26 passed 1 warning 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-01-26

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
26 January 2006
Last changed
25 December 2025
Expires
26 January 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns1.automattic.com, ns2.automattic.com, ns3.automattic.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 2028-01-26 #3
    The registration is valid until 2028-01-26 (460 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

ns1.automattic.com, ns2.automattic.com, ns3.automattic.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.automattic.com, ns2.automattic.com, ns3.automattic.com
NS in the zone
ns1.automattic.com, ns2.automattic.com, ns3.automattic.com
NameserverAddressesNetwork (AS)Glue
ns1.automattic.com198.181.116.5 2a04:fa87:ffff::c6b5:7405AS2635 AUTOMATTIC - Automattic, Inc, US AS2635 AUTOMATTIC - Automattic, Inc, US198.181.116.5 2a04:fa87:ffff::c6b5:7405
ns2.automattic.com198.181.117.5 2a04:fa87:ffff::c6b5:7505AS2635 AUTOMATTIC - Automattic, Inc, US AS2635 AUTOMATTIC - Automattic, Inc, US198.181.117.5 2a04:fa87:ffff::c6b5:7505
ns3.automattic.com192.0.74.5 2620:115:c00f::c000:4a05AS2635 AUTOMATTIC - Automattic, Inc, US AS2635 AUTOMATTIC - Automattic, Inc, US192.0.74.5 2620:115:c00f::c000:4a05

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.automattic.com, ns2.automattic.com, ns3.automattic.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 3 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2635 (AUTOMATTIC - Automattic, Inc, US): 6 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 .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

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.automattic.com 198.181.116.5NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1.automattic.com 2a04:fa87:ffff::c6b5:7405NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.automattic.com 198.181.117.5NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.automattic.com 2a04:fa87:ffff::c6b5:7505NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.automattic.com 192.0.74.5NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.automattic.com 2620:115:c00f::c000:4a05NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 6 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: ns1.automattic.com: "Served by PowerDNS - https://www.powerdns.com/"; ns2.automattic.com: "Served by PowerDNS - https://www.powerdns.com/"; ns3.automattic.com: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2022042004 · primary ns1.automattic.com

Found

Primary (MNAME)
ns1.automattic.com
Contact (RNAME)
hostmaster.automattic.com
Serial
2022042004
Refresh / retry
14400 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.automattic.com (198.181.116.5)2022042004
ns1.automattic.com (2a04:fa87:ffff::c6b5:7405)2022042004
ns2.automattic.com (198.181.117.5)2022042004
ns2.automattic.com (2a04:fa87:ffff::c6b5:7505)2022042004
ns3.automattic.com (192.0.74.5)2022042004
ns3.automattic.com (2620:115:c00f::c000:4a05)2022042004

Checks

  • ✓ Serial 2022042004 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.automattic.com is one of the listed nameservers.
  • ✓ Contact hostmaster@automattic.com #25
    The SOA RNAME hostmaster.automattic.com means hostmaster@automattic.com.
  • ✓ Date-based serial #26
    The serial 2022042004 follows the YYYYMMDDnn convention (2022-04-20).

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

pass

10 records at the apex

Found

Read from
198.181.116.5:53
TypeValueTTL
SOAns1.automattic.com. hostmaster.automattic.com. 2022042004 14400 7200 604800 30014400
NSns3.automattic.com.14400
NSns1.automattic.com.14400
NSns2.automattic.com.14400
A192.0.123.246300
A192.0.123.247300
MX10 mx1.dfw.automattic.com.3600
MX10 mx2.ams.automattic.com.3600
TXT"v=spf1 include:_spf.automattic.com include:mail.zendesk.com -all"300
CAA0 issue "letsencrypt.org;validationmethods=dns-01;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/36334489"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.