unsplash.com

Checked 22 October 2026, 11:15 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 2013
Last changed
24 May 2026
Expires
29 May 2027
Status
client transfer prohibited
Registry nameservers
ns1.dnsimple-edge.com, ns2.dnsimple-edge.net, ns3.dnsimple-edge.io, ns4.dnsimple-edge.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 2027-05-29 #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

info

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

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.dnsimple-edge.com, ns2.dnsimple-edge.net, ns3.dnsimple-edge.io, ns4.dnsimple-edge.org
NS in the zone
ns1.dnsimple-edge.com, ns2.dnsimple-edge.net, ns3.dnsimple-edge.io, ns4.dnsimple-edge.org
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
ns2.dnsimple-edge.net199.247.153.53 2620:111:8005::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns3.dnsimple-edge.io199.247.154.53 2620:111:8006::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns4.dnsimple-edge.org199.247.155.53 2620:111:8007::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.dnsimple-edge.com, ns2.dnsimple-edge.net, ns3.dnsimple-edge.io, ns4.dnsimple-edge.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 (AS32771 (DNSIMPLE - DNSimple Corporation, 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 .com, .io, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 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-
ns2.dnsimple-edge.net 199.247.153.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.dnsimple-edge.net 2620:111:8005::53NOERROR, 13 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-
ns4.dnsimple-edge.org 199.247.155.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns4.dnsimple-edge.org 2620:111:8007::53NOERROR, 13 ms, authoritativenoyes / yesrefused-

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.
  • ✓ 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

pass

serial 1438279174 · primary ns1.dnsimple-edge.com

Found

Primary (MNAME)
ns1.dnsimple-edge.com
Contact (RNAME)
admin.dnsimple.com
Serial
1438279174
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)1438279174
ns1.dnsimple-edge.com (2620:111:8004::53)1438279174
ns2.dnsimple-edge.net (199.247.153.53)1438279174
ns2.dnsimple-edge.net (2620:111:8005::53)1438279174
ns3.dnsimple-edge.io (199.247.154.53)1438279174
ns3.dnsimple-edge.io (2620:111:8006::53)1438279174
ns4.dnsimple-edge.org (199.247.155.53)1438279174
ns4.dnsimple-edge.org (2620:111:8007::53)1438279174

Checks

  • ✓ Serial 1438279174 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.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dnsimple-edge.com is one of the listed nameservers.
  • ✓ Contact admin@dnsimple.com #25
    The SOA RNAME admin.dnsimple.com means admin@dnsimple.com.
  • ✓ Timestamp serial #26
    The serial 1438279174 is a Unix timestamp (2015-07-30 17:59 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

26 records at the apex

Found

Read from
199.247.152.53:53
TypeValueTTL
SOAns1.dnsimple-edge.com. admin.dnsimple.com. 1438279174 86400 7200 604800 3003600
NSns1.dnsimple-edge.com.3600
NSns2.dnsimple-edge.net.3600
NSns3.dnsimple-edge.io.3600
NSns4.dnsimple-edge.org.3600
A151.101.1.1813600
A151.101.65.1813600
A151.101.129.1813600
A151.101.193.1813600
MX1 aspmx.l.google.com.3600
MX5 alt1.aspmx.l.google.com.3600
MX5 alt2.aspmx.l.google.com.3600
MX10 alt3.aspmx.l.google.com.3600
MX10 alt4.aspmx.l.google.com.3600
TXT"globalsign-domain-verification=-Q7umwx2mj164XwLa0PsoUaWe2HBhta50GjggsT98f"60
TXT"globalsign-domain-verification=wvdz6fqNpGYoUxoyCbEUOYrkz-Z8Nh2zXAoS8lsLRh"60
TXT"google-site-verification=3TFVP5wlMKhkmagET_X87aHEIx1nSZK12fE0BayCk2g"60
TXT"google-site-verification=MN-leMC4Xzz1GBGsGz1Zy5cYXwGJgOEweJOP2N2nHA0"60
TXT"google-site-verification=MwxRROyKaRpaIYWdWIwrkQWm9SDphaKClz_EIZtH4xY"60
TXT"google-site-verification=QVsj0lPhtgD8IIhM78ng8Z1hethHUz_V8cVaFKmsnW4"60
TXT"status-page-domain-verification=1bbzrwmj14kg"600
TXT"_globalsign-domain-verification=-lBuNJDFRxDkLkNbYOLBU03PlWjnPqAzBPAVUokhAw"3600
TXT"google-site-verification=EC13_iy3v0VOGcAdYGFTWt5pnsr6MjMfrfEuiKVfTB0"3600
TXT"google-site-verification=c1KJeDIoCGbgTtiOwC0d0JttaMi4B8lqUoSo2ndCKRc"3600
TXT"mandrill_verify.pCDWMCTNVIlLI4sypuI4sQ"3600
TXT"v=spf1 include:nzx5d.s.dmarcdutydns.com ~include:nzx5d.a.dmarcdutydns.com include:_spf.google.com include:sendgrid.net include:smtp.groovehq.com include:mailgun.org -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, 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