merckmanuals.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
iAll checks passed
26 passed 0 warnings 0 failed 5 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-02-16

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
16 February 2000
Last changed
15 January 2026
Expires
16 February 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.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 2028-02-16 #3
    The registration is valid until 2028-02-16 (482 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.com
NS in the zone
dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.com
NameserverAddressesNetwork (AS)Glue
dns1.p03.nsone.net198.51.44.3 2620:4d:4000:6259:7:3:0:1AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns2.p03.nsone.net198.51.45.3 2a00:edc0:6259:7:3::2AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns3.p03.nsone.net198.51.44.67 2620:4d:4000:6259:7:3:0:3AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns4.p03.nsone.net198.51.45.67 2a00:edc0:6259:7:3::4AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
ns01.msddns.com45.54.26.1AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US45.54.26.1
ns02.msddns.com45.54.26.65AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US45.54.26.65
ns03.msddns.com45.54.26.129AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US45.54.26.129
ns04.msddns.com45.54.26.193AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US45.54.26.193

Checks

  • ✓ 8 nameservers #6
    Delegated to dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net, ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS62597 (NSONE - NSONE Inc, US): 8 addresses; AS63911 (NETACTUATE-AS-AP - NetActuate, Inc, US): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns01.msddns.com, ns02.msddns.com, ns03.msddns.com, ns04.msddns.com.
    #13

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.p03.nsone.net 198.51.44.3NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns1.p03.nsone.net 2620:4d:4000:6259:7:3:0:1NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p03.nsone.net 198.51.45.3NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p03.nsone.net 2a00:edc0:6259:7:3::2NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p03.nsone.net 198.51.44.67NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p03.nsone.net 2620:4d:4000:6259:7:3:0:3NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p03.nsone.net 198.51.45.67NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p03.nsone.net 2a00:edc0:6259:7:3::4NOERROR, 3 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns01.msddns.com 45.54.26.1NOERROR, 11 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns02.msddns.com 45.54.26.65NOERROR, 9 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns03.msddns.com 45.54.26.129NOERROR, 10 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns04.msddns.com 45.54.26.193NOERROR, 9 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9

Checks

  • ✓ All respond #14
    All 12 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: dns1.p03.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns2.p03.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns3.p03.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns4.p03.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; ns01.msddns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns02.msddns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns03.msddns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns04.msddns.com: "19dd46e347df36b70933bf2be8023258586586a9".
    #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

pass

serial 1743015182 · primary dns1.p03.nsone.net

Found

Primary (MNAME)
dns1.p03.nsone.net
Contact (RNAME)
hostmaster.nsone.net
Serial
1743015182
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.p03.nsone.net (198.51.44.3)1743015182
dns1.p03.nsone.net (2620:4d:4000:6259:7:3:0:1)1743015182
dns2.p03.nsone.net (198.51.45.3)1743015182
dns2.p03.nsone.net (2a00:edc0:6259:7:3::2)1743015182
dns3.p03.nsone.net (198.51.44.67)1743015182
dns3.p03.nsone.net (2620:4d:4000:6259:7:3:0:3)1743015182
dns4.p03.nsone.net (198.51.45.67)1743015182
dns4.p03.nsone.net (2a00:edc0:6259:7:3::4)1743015182
ns01.msddns.com (45.54.26.1)1743015182
ns02.msddns.com (45.54.26.65)1743015182
ns03.msddns.com (45.54.26.129)1743015182
ns04.msddns.com (45.54.26.193)1743015182

Checks

  • ✓ Serial 1743015182 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.p03.nsone.net is one of the listed nameservers.
  • ✓ Contact hostmaster@nsone.net #25
    The SOA RNAME hostmaster.nsone.net means hostmaster@nsone.net.
  • ✓ Timestamp serial #26
    The serial 1743015182 is a Unix timestamp (2025-03-26 18:53 UTC).

DNSSEC

info

DNS query for merckmanuals.com failed: read udp 46.225.38.91:41519->8.8.8.8:53: i/o timeout

Checks

  • i
    Could not be checked
    The DNSSEC lookup failed, so this could not be checked: DNS query for merckmanuals.com failed: read udp 46.225.38.91:41519->8.8.8.8:53: i/o timeout
    #27

Records

info

17 records at the apex

Found

Read from
198.51.44.3:53
TypeValueTTL
SOAdns1.p03.nsone.net. hostmaster.nsone.net. 1743015182 43200 7200 1209600 36003600
NSdns1.p03.nsone.net.3600
NSdns2.p03.nsone.net.3600
NSdns3.p03.nsone.net.3600
NSdns4.p03.nsone.net.3600
NSns01.msddns.com.3600
NSns02.msddns.com.3600
NSns03.msddns.com.3600
NSns04.msddns.com.3600
A166.117.53.1723600
A3.33.166.1973600
TXT"v=spf1 -all"3600
TXT"MS=ms79134086"3600
TXT"YLTgwCZhCT2Zty_kX9y5jsrKfI25KyDZoNg_nDMZy4E"3600
TXT"facebook-domain-verification=b9xccepqmc7hbxtsbpt83dk6wb8inf"3600
TXT"google-site-verification=YLTgwCZhCT2Zty_kX9y5jsrKfI25KyDZoNg_nDMZy4E"3600
TXT"google-site-verification=z3f91tBhNW1CHTQGJL1YFbkR982996VQ3Ez07cGUkgc"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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