phdcomics.com

Checked 22 October 2026, 10:13 UTC · via 8.8.8.8
!Passed with warnings
20 passed 6 warnings 0 failed 5 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2027-06-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
4 June 2002
Last changed
6 May 2026
Expires
4 June 2027
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns1.dreamhost.com, ns2.dreamhost.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 2027-06-04 #3
    The registration is valid until 2027-06-04 (224 days).
  • ✓ Transfer locked #4
    Registry status: 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.dreamhost.com, ns2.dreamhost.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.dreamhost.com, ns2.dreamhost.com
NS in the zone
ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com
NameserverAddressesNetwork (AS)Glue
ns1.dreamhost.com162.159.26.14AS13335 CLOUDFLARENET - Cloudflare, Inc., US162.159.26.14
ns2.dreamhost.com162.159.26.81AS13335 CLOUDFLARENET - Cloudflare, Inc., US162.159.26.81
ns3.dreamhost.com (zone only)162.159.27.84AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.dreamhost.com, ns2.dreamhost.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns3.dreamhost.com. ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com report NS ns1.dreamhost.com ns2.dreamhost.com ns3.dreamhost.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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 3 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

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dreamhost.com 162.159.26.14NOERROR, 93 ms, authoritativenoyes / yesrefused2026.10.8
ns2.dreamhost.com 162.159.26.81NOERROR, 95 ms, authoritativenoyes / yesrefused2026.10.8
ns3.dreamhost.com 162.159.27.84NOERROR, 93 ms, authoritativenoyes / yesrefused2026.10.8

Checks

  • ✓ All respond #14
    All 3 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.dreamhost.com: "2026.10.8"; ns2.dreamhost.com: "2026.10.8"; ns3.dreamhost.com: "2026.10.8". 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

warn

serial 2026091403 · primary ns1.dreamhost.com

Found

Primary (MNAME)
ns1.dreamhost.com
Contact (RNAME)
hostmaster.dreamhost.com
Serial
2026091403
Refresh / retry
17259 s / 600 s
Expire
1814400 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
ns1.dreamhost.com (162.159.26.14)2026091403
ns2.dreamhost.com (162.159.26.81)2026091403
ns3.dreamhost.com (162.159.27.84)2026091403

Checks

  • ✓ Serial 2026091403 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 4h47m39s, retry 10m, expire 21d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dreamhost.com is one of the listed nameservers.
  • ✓ Contact hostmaster@dreamhost.com #25
    The SOA RNAME hostmaster.dreamhost.com means hostmaster@dreamhost.com.
  • ✓ Date-based serial #26
    The serial 2026091403 follows the YYYYMMDDnn convention (2026-09-14).

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

warn

10 records at the apex

Found

Read from
162.159.26.14:53
TypeValueTTL
SOAns1.dreamhost.com. hostmaster.dreamhost.com. 2026091403 17259 600 1814400 6060
NSns2.dreamhost.com.14400
NSns3.dreamhost.com.14400
NSns1.dreamhost.com.14400
A64.90.39.24560
MX0 alt1.aspmx.l.google.com.60
MX0 alt2.aspmx.l.google.com.60
MX0 aspmx.l.google.com.60
MX0 aspmx2.googlemail.com.60
MX0 aspmx3.googlemail.com.60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 4h; resolvers may use either.
    #32
  • ✓ 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