nybooks.com

Checked 22 October 2026, 10:04 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 warnings 0 failed 7 info

Registration

info

.com generic · Domain.com - Network Solutions, LLC · expires 2027-02-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Domain.com - Network Solutions, LLC
Registered
4 October 1996
Last changed
12 January 2026
Expires
1 February 2027
Status
client transfer prohibited
Registry nameservers
ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.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 2027-02-01 #3
    The registration is valid until 2027-02-01 (101 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

ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com
NS in the zone
ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com, ns4.dnsmadeeasy.com
NameserverAddressesNetwork (AS)Glue
ns0.dnsmadeeasy.com208.94.148.2 2600:1800::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.148.2 2600:1800::1
ns1.dnsmadeeasy.com208.80.124.2 2600:1801:1::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.124.2 2600:1801:1::1
ns2.dnsmadeeasy.com208.80.126.2 2600:1802:2::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.126.2 2600:1802:2::1
ns3.dnsmadeeasy.com208.80.125.2 2600:1801:3::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.125.2 2600:1801:3::1
ns4.dnsmadeeasy.com (zone only)208.80.127.2 2600:1802:4::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns4.dnsmadeeasy.com. ns0.dnsmadeeasy.com, ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com, ns4.dnsmadeeasy.com report NS ns0.dnsmadeeasy.com ns1.dnsmadeeasy.com ns2.dnsmadeeasy.com ns3.dnsmadeeasy.com ns4.dnsmadeeasy.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 5 IPv4 /24s and 5 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16552 (DIGICERT - Tiggee LLC, US): 10 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

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.dnsmadeeasy.com 208.94.148.2NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns0.dnsmadeeasy.com 2600:1800::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns1.dnsmadeeasy.com 208.80.124.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns1.dnsmadeeasy.com 2600:1801:1::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns2.dnsmadeeasy.com 208.80.126.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns2.dnsmadeeasy.com 2600:1802:2::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns3.dnsmadeeasy.com 208.80.125.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns3.dnsmadeeasy.com 2600:1801:3::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns4.dnsmadeeasy.com 208.80.127.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns4.dnsmadeeasy.com 2600:1802:4::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

Checks

  • ✓ All respond #14
    All 10 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: ns0.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns1.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns2.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns3.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns4.dnsmadeeasy.com: "DNS Made Easy Anycast".
    #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

warn

serial 2009010118 · primary ns10.digicertdns.com

Found

Primary (MNAME)
ns10.digicertdns.com
Contact (RNAME)
dns.digicertdns.com
Serial
2009010118
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns0.dnsmadeeasy.com (208.94.148.2)2009010118
ns0.dnsmadeeasy.com (2600:1800::1)2009010118
ns1.dnsmadeeasy.com (208.80.124.2)2009010118
ns1.dnsmadeeasy.com (2600:1801:1::1)2009010118
ns2.dnsmadeeasy.com (208.80.126.2)2009010118
ns2.dnsmadeeasy.com (2600:1802:2::1)2009010118
ns3.dnsmadeeasy.com (208.80.125.2)2009010118
ns3.dnsmadeeasy.com (2600:1801:3::1)2009010118
ns4.dnsmadeeasy.com (208.80.127.2)2009010118
ns4.dnsmadeeasy.com (2600:1802:4::1)2009010118

Checks

  • ✓ Serial 2009010118 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 1h, expire 14d, negative TTL 3m.
    #23
  • i
    Hidden master
    The primary nameserver ns10.digicertdns.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 dns@digicertdns.com #25
    The SOA RNAME dns.digicertdns.com means dns@digicertdns.com.
  • ✓ Date-based serial #26
    The serial 2009010118 follows the YYYYMMDDnn convention (2009-01-01).

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

18 records at the apex

Found

Read from
208.94.148.2:53
TypeValueTTL
SOAns10.digicertdns.com. dns.digicertdns.com. 2009010118 43200 3600 1209600 18086400
NSns0.dnsmadeeasy.com.86400
NSns1.dnsmadeeasy.com.86400
NSns2.dnsmadeeasy.com.86400
NSns3.dnsmadeeasy.com.86400
NSns4.dnsmadeeasy.com.86400
A192.0.66.176600
MX0 nybooks-com.mail.protection.outlook.com.3600
TXT"fastly-domain-delegation-p9dmgesde4piitar3hof-581394-2023-03-10"1800
TXT"v=spf1 a mx ip4:199.33.226.0/24 ip4:12.15.39.200/29 include:spf.protection.outlook.com include:_spf.createsend.com include:shops.shopify.com include:amazonses.com include:51780890.spf05.hubspotemail.net -all"1800
TXT"ZOOM_verify_tyRtSXBX7pdMTeSb9aiK8Q"1800
TXT"apple-domain-verification=2aG8yMeZIiD9PXyG"1800
TXT"MS=ms29237962"1800
TXT"facebook-domain-verification=05iqz3nhod4vfcjjun14ll99g9a30z"1800
TXT"facebook-domain-verification=d4fpoioj1i85uqjm47zggk01qztyyu"1800
TXT"7gea1it23uf6dslke3rufje0bu"1800
TXT"google-site-verification=j5eT_lYY9gU40bJzZDbiGLUuPA_Ak-iyxmQZ4Zd-Dpc"1800
TXT"google-site-verification=-F_3oVS0SjGgsasQDSyzoTsW2Wz6vYWKb9HyU5lDsgQ"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 1h, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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