theconversation.com

Checked 22 October 2026, 11:02 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 3 info

Registration

info

.com generic · 1API GmbH · expires 2027-05-29

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
1API GmbH
Registered
29 May 2003
Last changed
11 June 2026
Expires
29 May 2027
Status
client transfer prohibited
Registry nameservers
ns1.dnsimple-edge.com, ns1.dnsunlimited.com, ns2.dnsimple-edge.net, ns2.dnsunlimited.com, ns3.dnsimple-edge.io, ns3.dnsunlimited.com, ns4.dnsimple-edge.org, ns4.dnsunlimited.com, ns5.dnsunlimited.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 2027-05-29 #3
    The registration is valid until 2027-05-29 (219 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

pass

ns1.dnsimple-edge.com, ns1.dnsunlimited.com, ns2.dnsimple-edge.net, ns2.dnsunlimited.com, ns3.dnsimple-edge.io, ns3.dnsunlimited.com, ns4.dnsimple-edge.org, ns4.dnsunlimited.com, ns5.dnsunlimited.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.dnsimple-edge.com, ns1.dnsunlimited.com, ns2.dnsimple-edge.net, ns2.dnsunlimited.com, ns3.dnsimple-edge.io, ns3.dnsunlimited.com, ns4.dnsimple-edge.org, ns4.dnsunlimited.com, ns5.dnsunlimited.com
NS in the zone
ns1.dnsimple-edge.com, ns1.dnsunlimited.com, ns2.dnsimple-edge.net, ns2.dnsunlimited.com, ns3.dnsimple-edge.io, ns3.dnsunlimited.com, ns4.dnsimple-edge.org, ns4.dnsunlimited.com, ns5.dnsunlimited.com
NameserverAddressesNetwork (AS)Glue
ns1.dnsimple-edge.com199.247.152.53 2620:111:8004::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US199.247.152.53 2620:111:8004::53
ns1.dnsunlimited.com45.79.220.61 2600:3c02:e000:1b7::53AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG2600:3c02:e000:1b7::53 45.79.220.61
ns2.dnsimple-edge.net199.247.153.53 2620:111:8005::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns2.dnsunlimited.com45.79.180.129 2600:3c03:e000:435::53AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG2600:3c03:e000:435::53 45.79.180.129
ns3.dnsimple-edge.io199.247.154.53 2620:111:8006::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns3.dnsunlimited.com69.164.207.210 2600:3c00:e000:252::53AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG2600:3c00:e000:252::53 69.164.207.210
ns4.dnsimple-edge.org199.247.155.53 2620:111:8007::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns4.dnsunlimited.com66.175.221.62 2600:3c01:e000:430::53AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG2600:3c01:e000:430::53 66.175.221.62
ns5.dnsunlimited.com178.79.148.169 2a01:7e00:e000:428::53AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG178.79.148.169 2a01:7e00:e000:428::53

Checks

  • ✓ 9 nameservers #6
    Delegated to ns1.dnsimple-edge.com, ns1.dnsunlimited.com, ns2.dnsimple-edge.net, ns2.dnsunlimited.com, ns3.dnsimple-edge.io, ns3.dnsunlimited.com, ns4.dnsimple-edge.org, ns4.dnsunlimited.com, ns5.dnsunlimited.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 9 IPv4 /24s and 9 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS32771 (DNSIMPLE - DNSimple Corporation, US): 8 addresses; AS63949 (AKAMAI-LINODE-AP - Akamai Connected Cloud, SG): 10 addresses.
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .io, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

18 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dnsimple-edge.com 199.247.152.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns1.dnsimple-edge.com 2620:111:8004::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns1.dnsunlimited.com 45.79.220.61NOERROR, 108 ms, authoritativenoyes / yesrefused-
ns1.dnsunlimited.com 2600:3c02:e000:1b7::53NOERROR, 107 ms, authoritativenoyes / yesrefused-
ns2.dnsimple-edge.net 199.247.153.53NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns2.dnsimple-edge.net 2620:111:8005::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.dnsunlimited.com 45.79.180.129NOERROR, 91 ms, authoritativenoyes / yesrefused-
ns2.dnsunlimited.com 2600:3c03:e000:435::53NOERROR, 85 ms, authoritativenoyes / yesrefused-
ns3.dnsimple-edge.io 199.247.154.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns3.dnsimple-edge.io 2620:111:8006::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns3.dnsunlimited.com 69.164.207.210NOERROR, 128 ms, authoritativenoyes / yesrefused-
ns3.dnsunlimited.com 2600:3c00:e000:252::53NOERROR, 123 ms, authoritativenoyes / yesrefused-
ns4.dnsimple-edge.org 199.247.155.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns4.dnsimple-edge.org 2620:111:8007::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns4.dnsunlimited.com 66.175.221.62NOERROR, 164 ms, authoritativenoyes / yesrefused-
ns4.dnsunlimited.com 2600:3c01:e000:430::53NOERROR, 158 ms, authoritativenoyes / yesrefused-
ns5.dnsunlimited.com 178.79.148.169NOERROR, 17 ms, authoritativenoyes / yesrefused-
ns5.dnsunlimited.com 2a01:7e00:e000:428::53NOERROR, 17 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 18 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

info

serial 1427610271 · primary axfr.dnsimple.com

Found

Primary (MNAME)
axfr.dnsimple.com
Contact (RNAME)
admin.dnsimple.com
Serial
1427610271
Refresh / retry
86400 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.dnsimple-edge.com (199.247.152.53)1427610271
ns1.dnsimple-edge.com (2620:111:8004::53)1427610271
ns1.dnsunlimited.com (45.79.220.61)1427610271
ns1.dnsunlimited.com (2600:3c02:e000:1b7::53)1427610271
ns2.dnsimple-edge.net (199.247.153.53)1427610271
ns2.dnsimple-edge.net (2620:111:8005::53)1427610271
ns2.dnsunlimited.com (45.79.180.129)1427610271
ns2.dnsunlimited.com (2600:3c03:e000:435::53)1427610271
ns3.dnsimple-edge.io (199.247.154.53)1427610271
ns3.dnsimple-edge.io (2620:111:8006::53)1427610271
ns3.dnsunlimited.com (69.164.207.210)1427610271
ns3.dnsunlimited.com (2600:3c00:e000:252::53)1427610271
ns4.dnsimple-edge.org (199.247.155.53)1427610271
ns4.dnsimple-edge.org (2620:111:8007::53)1427610271
ns4.dnsunlimited.com (66.175.221.62)1427610271
ns4.dnsunlimited.com (2600:3c01:e000:430::53)1427610271
ns5.dnsunlimited.com (178.79.148.169)1427610271
ns5.dnsunlimited.com (2a01:7e00:e000:428::53)1427610271

Checks

  • ✓ Serial 1427610271 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 7d, negative TTL 5m.
  • i
    Hidden master
    The primary nameserver axfr.dnsimple.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact admin@dnsimple.com #25
    The SOA RNAME admin.dnsimple.com means admin@dnsimple.com.
  • ✓ Timestamp serial #26
    The serial 1427610271 is a Unix timestamp (2015-03-29 06:24 UTC).

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

34 records at the apex

Found

Read from
199.247.152.53:53
TypeValueTTL
SOAaxfr.dnsimple.com. admin.dnsimple.com. 1427610271 86400 7200 604800 3003600
NSns1.dnsimple-edge.com.3600
NSns1.dnsunlimited.com.3600
NSns2.dnsimple-edge.net.3600
NSns2.dnsunlimited.com.3600
NSns3.dnsimple-edge.io.3600
NSns3.dnsunlimited.com.3600
NSns4.dnsimple-edge.org.3600
NSns4.dnsunlimited.com.3600
NSns5.dnsunlimited.com.3600
A151.101.2.13228800
A151.101.66.13228800
A151.101.130.13228800
A151.101.194.13228800
MX1 aspmx.l.google.com.28800
MX5 alt1.aspmx.l.google.com.28800
MX5 alt2.aspmx.l.google.com.28800
MX10 alt3.aspmx.l.google.com.28800
MX10 alt4.aspmx.l.google.com.28800
TXT"MS=ms37265398"3600
TXT"airtable-verification=8e02fcd1848b05d74ddd6dcc2a68033e"3600
TXT"anthropic-domain-verification-mkdhms=4dAgmCfdis0Cj39yveHNEDULj"3600
TXT"apple-domain-verification=WkMT4MJWjWcC3csbzo4R7AbUZrneLNY8q0f-CEvQVx0"3600
TXT"apple-domain-verification=uL1NfC5eZbnNS5tR"3600
TXT"atlassian-domain-verification=gyeGKvuGtcVsT6g58QJ89G7Bhzguj7jCXWBIpmxCaunkiOPNzlww0a1aTfLjYz/b"3600
TXT"canva-site-verification=Nj-Dsc0AEOP995BTs5wNDw"3600
TXT"cursor-domain-verification-eqdfv5=mZgiJJbJNCOyiYihdtJp9cpPg"3600
TXT"facebook-domain-verification=l382f2v2i1nfui3f9jbe5qld3rw0sn"3600
TXT"google-site-verification=I4BlH49DCiuGk2QNXZ4-nOEyAf2wEjw0h1ac82P_L-M"3600
TXT"google-site-verification=SZ8cH6X7qBl3jqP1tnJQcWxmU9RbB96EtF0IGvlH52M"3600
TXT"slack-domain-verification=xUFyQGptIuaQbvz9gupfRkniC06SlIx4cJR12oHf"3600
TXT"stripe-verification=B50ABDD36E5F58827640B20817D99EE3262800925AFF6EE19E11832682C1095B"3600
TXT"v=spf1 include:_spf.google.com include:_spf.salesforce.com ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:203.55.21.29 ip4:143.55.234.128 include:sendgrid.net include:helpscoutemail.com -all"3600
TXT"yahoo-verification-key=VhMDNOl55POK3UqlvBDMqDKhivmULCdZfSu1NulpU/c="3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, MX 8h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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