simplebooklet.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 7 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2027-07-25

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
25 July 2010
Last changed
26 July 2026
Expires
25 July 2027
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns.sourcedns.com, ns1.sourcedns.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 2027-07-25 #3
    The registration is valid until 2027-07-25 (275 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew 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

warn

ns.sourcedns.com, ns1.sourcedns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns.sourcedns.com, ns1.sourcedns.com
NS in the zone
ns.sourcedns.com, ns1.sourcedns.com
NameserverAddressesNetwork (AS)Glue
ns.sourcedns.com69.16.222.254 2607:fad0:0:8917::aAS32244 LIQUIDWEB - Liquid Web, L.L.C, US AS32244 LIQUIDWEB - Liquid Web, L.L.C, US69.16.222.254
ns1.sourcedns.com69.16.223.254 2607:fad0:0:8927::aAS32244 LIQUIDWEB - Liquid Web, L.L.C, US AS32244 LIQUIDWEB - Liquid Web, L.L.C, US69.16.223.254

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.sourcedns.com, ns1.sourcedns.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns.sourcedns.com (glue 69.16.222.254, zone 69.16.222.254, 2607:fad0:0:8917::a); ns1.sourcedns.com (glue 69.16.223.254, zone 69.16.223.254, 2607:fad0:0:8927::a). Update the glue at your registrar.
    #8
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • i
    One address family in one network
    all IPv6 addresses are in 2607:fad0::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS32244 (LIQUIDWEB - Liquid Web, L.L.C, US): 4 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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.sourcedns.com 69.16.222.254NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns.sourcedns.com 2607:fad0:0:8917::aNOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.sourcedns.com 69.16.223.254NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.sourcedns.com 2607:fad0:0:8927::aNOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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 2026091701 · primary ns.sourcedns.com

Found

Primary (MNAME)
ns.sourcedns.com
Contact (RNAME)
admin.sourcedns.com
Serial
2026091701
Refresh / retry
28800 s / 7200 s
Expire
3600000 s
Negative TTL
14400 s

Serial per nameserver

NameserverSerial
ns.sourcedns.com (69.16.222.254)2026091701
ns.sourcedns.com (2607:fad0:0:8917::a)2026091701
ns1.sourcedns.com (69.16.223.254)2026091701
ns1.sourcedns.com (2607:fad0:0:8927::a)2026091701

Checks

  • ✓ Serial 2026091701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 1000h, negative TTL 4h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.sourcedns.com is one of the listed nameservers.
  • ✓ Contact admin@sourcedns.com #25
    The SOA RNAME admin.sourcedns.com means admin@sourcedns.com.
  • ✓ Date-based serial #26
    The serial 2026091701 follows the YYYYMMDDnn convention (2026-09-17).

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

14 records at the apex

Found

Read from
69.16.222.254:53
TypeValueTTL
SOAns.sourcedns.com. admin.sourcedns.com. 2026091701 28800 7200 3600000 1440072000
NSns1.sourcedns.com.72000
NSns.sourcedns.com.72000
A72.52.250.19300
MX5 alt2.aspmx.l.google.com.72000
MX10 aspmx2.googlemail.com.72000
MX5 alt1.aspmx.l.google.com.72000
MX1 aspmx.l.google.com.72000
MX10 aspmx3.googlemail.com.72000
TXT"_globalsign-domain-verification=mIEAIKndyhqvTrs8os_3sATYZyv5sw65dTGDDF3Jgy"3600
TXT"v=DMARC1; p=none; pct=100; rua=mailto:no-reply@simplebooklet.com"300
TXT"google-site-verification=sJ8-fRdKgyHbPMAJasA1-zecZNocQiO-BrIS1E7yZhg"100
TXT"v=spf1 mx a ip4:72.52.250.19 include:spf.braintreegateway.com include:aspmx.googlemail.com include:sendgrid.net ~all"300
TXT"MS=ms89809447"1200

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 20h, NS 20h. The NS TTL at the parent is 2d and in the zone 20h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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