ss64.com

Checked 22 October 2026, 10:51 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · pair Networks, Inc. d/b/a pair Domains · expires 2027-11-07

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
pair Networks, Inc. d/b/a pair Domains
Registered
7 November 2000
Last changed
26 June 2026
Expires
7 November 2027
Status
client transfer prohibited
Registry nameservers
ns3.pairnic.com, ns4.pairnic.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 2027-11-07 #3
    The registration is valid until 2027-11-07 (381 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

info

ns3.pairnic.com, ns4.pairnic.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns3.pairnic.com, ns4.pairnic.com
NS in the zone
ns3.pairnic.com, ns4.pairnic.com
NameserverAddressesNetwork (AS)Glue
ns3.pairnic.com216.92.3.93 2607:f440::d85c:35dAS7859 PAIR-NETWORKS - pair Networks, US AS7859 PAIR-NETWORKS - pair Networks, US216.92.3.93 2607:f440::d85c:35d
ns4.pairnic.com216.146.192.245 2607:f441::d892:c0f5AS7859 PAIR-NETWORKS - pair Networks, US AS7859 PAIR-NETWORKS - pair Networks, US216.146.192.245 2607:f441::d892:c0f5

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.pairnic.com, ns4.pairnic.com.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS7859 (PAIR-NETWORKS - pair Networks, US): 4 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

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.pairnic.com 216.92.3.93NOERROR, 90 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.3
ns3.pairnic.com 2607:f440::d85c:35dNOERROR, 93 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.3
ns4.pairnic.com 216.146.192.245NOERROR, 124 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.3
ns4.pairnic.com 2607:f441::d892:c0f5NOERROR, 127 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.3

Checks

  • ✓ All respond #14
    All 4 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: ns3.pairnic.com: "PowerDNS Authoritative Server 4.5.3"; ns4.pairnic.com: "PowerDNS Authoritative Server 4.5.3". 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 2025092232 · primary ns3.pairnic.com

Found

Primary (MNAME)
ns3.pairnic.com
Contact (RNAME)
root.pair.com
Serial
2025092232
Refresh / retry
3600 s / 300 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns3.pairnic.com (216.92.3.93)2025092232
ns3.pairnic.com (2607:f440::d85c:35d)2025092232
ns4.pairnic.com (216.146.192.245)2025092232
ns4.pairnic.com (2607:f441::d892:c0f5)2025092232

Checks

  • ✓ Serial 2025092232 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 5m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.pairnic.com is one of the listed nameservers.
  • ✓ Contact root@pair.com #25
    The SOA RNAME root.pair.com means root@pair.com.
  • ✓ Date-based serial #26
    The serial 2025092232 follows the YYYYMMDDnn convention (2025-09-22).

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
216.92.3.93:53
TypeValueTTL
SOAns3.pairnic.com. root.pair.com. 2025092232 3600 300 604800 3600432000
NSNS4.PAIRNIC.com.432000
NSNS3.PAIRNIC.com.432000
A216.92.186.205432000
MX5 ALT2.ASPMX.L.GOOGLE.com.432000
MX1 ASPMX.L.GOOGLE.com.432000
MX10 ASPMX2.GOOGLEMAIL.com.432000
MX10 ASPMX3.GOOGLEMAIL.com.432000
MX5 ALT1.ASPMX.L.GOOGLE.com.432000
TXT"v=spf1 include:_spf.google.com ~all"432000

Checks

  • ✓ TTLs within range #32
    TTLs: A 5d, MX 5d, NS 5d. The NS TTL at the parent is 2d and in the zone 5d; 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