std.com

Checked 22 October 2026, 10:51 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 1 failed 5 info

Registration

info

.com generic · Network Solutions, LLC · expires 2027-06-13

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
14 June 1989
Last changed
10 June 2026
Expires
13 June 2027
Status
client transfer prohibited
Registry nameservers
dns.std.com, dns.theworld.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 2027-06-13 #3
    The registration is valid until 2027-06-13 (233 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

dns.std.com, dns.theworld.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns.std.com, dns.theworld.com
NS in the zone
dns.std.com, dns.theworld.com
NameserverAddressesNetwork (AS)Glue
dns.std.com192.74.137.5AS19406 TWRS-MA - Towerstream I, Inc., US192.74.137.5
dns.theworld.com192.74.137.112AS19406 TWRS-MA - Towerstream I, Inc., US192.74.137.112

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns.std.com, dns.theworld.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns.std.com.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 192.74.137.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS19406 (TWRS-MA - Towerstream I, Inc., US): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.std.com 192.74.137.5NOERROR, 135 ms, authoritativenoyes / yesrefusedTheWorld.since1989
dns.theworld.com 192.74.137.112NOERROR, 132 ms, authoritativeOPENyes / yesrefuseddnsmasq-2.90

Checks

  • ✓ All respond #14
    All 2 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✗
    Open recursion
    These nameservers resolve names for anyone, which makes them usable for DNS amplification attacks and cache poisoning: dns.theworld.com (192.74.137.112). Disable recursion on authoritative servers.
    #16
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns.theworld.com: "dnsmasq-2.90". Hide or replace the version string.
    #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 2026092101 · primary dns.std.com

Found

Primary (MNAME)
dns.std.com
Contact (RNAME)
netadmin.world.std.com
Serial
2026092101
Refresh / retry
21600 s / 3600 s
Expire
604800 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
dns.std.com (192.74.137.5)2026092101
dns.theworld.com (192.74.137.112)2026092101

Checks

  • ✓ Serial 2026092101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 7d, negative TTL 2h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.std.com is one of the listed nameservers.
  • ✓ Contact netadmin@world.std.com #25
    The SOA RNAME netadmin.world.std.com means netadmin@world.std.com.
  • ✓ Date-based serial #26
    The serial 2026092101 follows the YYYYMMDDnn convention (2026-09-21).

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

7 records at the apex

Found

Read from
192.74.137.5:53
TypeValueTTL
SOAdns.std.com. netadmin.world.std.com. 2026092101 21600 3600 604800 72003600
NSdns.std.com.3600
NSdns.theworld.com.3600
A192.74.137.53600
MX10 smtp.TheWorld.com.3600
TXT"google-site-verification=jwnm1vxS63mtdIYbV3XgChdqy7jQNUFJ-M8N8hptV4M"3600
TXT"v=spf1 mx ip4:192.74.137.145 ip4:192.74.137.146 ip4:192.74.137.147 ip4:192.74.137.148 ip4:192.74.137.5 ip4:192.74.137.101 ~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