mercopress.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
✗Problems found
22 passed 3 warnings 1 failed 5 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2027-08-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
21 August 1996
Last changed
31 July 2026
Expires
20 August 2027
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.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 2027-08-20 #3
    The registration is valid until 2027-08-20 (301 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

ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com
NS in the zone
ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com, ns5.linode.com
NameserverAddressesNetwork (AS)Glue
ns1.linode.com92.123.94.2 2600:14c0:6::2AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL2600:14c0:6::2 92.123.94.2
ns2.linode.com92.123.94.3 2600:14c0:6::3AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL2600:14c0:6::3 92.123.94.3
ns3.linode.com92.123.95.3 2600:14c0:7::3AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL2600:14c0:7::3 92.123.95.3
ns4.linode.com92.123.95.4 2600:14c0:7::4AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL2600:14c0:7::4 92.123.95.4
ns5.linode.com (zone only)92.123.95.2 2600:14c0:7::2AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns5.linode.com. ns1.linode.com, ns2.linode.com, ns3.linode.com, ns4.linode.com, ns5.linode.com report NS ns1.linode.com ns2.linode.com ns3.linode.com ns4.linode.com ns5.linode.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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 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

fail

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.linode.com 92.123.94.2NOERROR, 3 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns1.linode.com 2600:14c0:6::2NOERROR, 16 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns2.linode.com 92.123.94.3NOERROR, 15 ms, authoritativenono / yesrefusedLinode.com DNS
ns2.linode.com 2600:14c0:6::3NOERROR, 16 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns3.linode.com 92.123.95.3NOERROR, 15 ms, authoritativenoyes / yesrefused-
ns3.linode.com 2600:14c0:7::3NOERROR, 16 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns4.linode.com 92.123.95.4NOERROR, 82 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns4.linode.com 2600:14c0:7::4NOERROR, 16 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns5.linode.com 92.123.95.2NOERROR, 85 ms, authoritativenoyes / yesrefusedLinode.com DNS
ns5.linode.com 2600:14c0:7::2NOERROR, 16 ms, authoritativenoyes / yesrefusedLinode.com DNS

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: ns1.linode.com: "Linode.com DNS"; ns2.linode.com: "Linode.com DNS"; ns3.linode.com: "Linode.com DNS"; ns4.linode.com: "Linode.com DNS"; ns5.linode.com: "Linode.com DNS".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns2.linode.com (92.123.94.3): read tcp 46.225.38.91:55634->92.123.94.3:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2021000016 · primary ns1.linode.com

Found

Primary (MNAME)
ns1.linode.com
Contact (RNAME)
gus.mercopress.com
Serial
2021000016
Refresh / retry
14400 s / 14400 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.linode.com (92.123.94.2)2021000016
ns1.linode.com (2600:14c0:6::2)2021000016
ns2.linode.com (92.123.94.3)2021000016
ns2.linode.com (2600:14c0:6::3)2021000016
ns3.linode.com (92.123.95.3)2021000016
ns3.linode.com (2600:14c0:7::3)2021000016
ns4.linode.com (92.123.95.4)2021000016
ns4.linode.com (2600:14c0:7::4)2021000016
ns5.linode.com (92.123.95.2)2021000016
ns5.linode.com (2600:14c0:7::2)2021000016

Checks

  • ✓ Serial 2021000016 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 4h should be shorter than refresh 4h. Current values: refresh 4h, retry 4h, expire 14d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.linode.com is one of the listed nameservers.
  • ✓ Contact gus@mercopress.com #25
    The SOA RNAME gus.mercopress.com means gus@mercopress.com.
  • ✓ Timestamp serial #26
    The serial 2021000016 is a Unix timestamp (2034-01-16 04:53 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

10 records at the apex

Found

Read from
92.123.94.2:53
TypeValueTTL
SOAns1.linode.com. gus.mercopress.com. 2021000016 14400 14400 1209600 8640086400
NSns4.linode.com.86400
NSns1.linode.com.86400
NSns3.linode.com.86400
NSns2.linode.com.86400
NSns5.linode.com.86400
A72.14.188.2013600
MX10 server179.dinamichosting.com.3600
TXT"v=spf1 +ip4:179.27.158.26 +ip4:190.0.132.244 +include:servers.mcsv.net ~all"86400
TXT"facebook-domain-verification=99fr1plkb82aehoxig60d9f7ls8zim"86400

Checks

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