ainaishu.com

Checked 22 October 2026, 07:41 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · Shanghai Meicheng Technology Information Development Co., Ltd. · expires 2027-07-24

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Shanghai Meicheng Technology Information Development Co., Ltd.
Registered
24 July 2019
Last changed
31 May 2026
Expires
24 July 2027
Status
client transfer prohibited
Registry nameservers
a.ezdnscenter.com, b.ezdnscenter.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 2027-07-24 #3
    The registration is valid until 2027-07-24 (275 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

a.ezdnscenter.com, b.ezdnscenter.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a.ezdnscenter.com, b.ezdnscenter.com
NS in the zone
a.ezdnscenter.com, b.ezdnscenter.com
NameserverAddressesNetwork (AS)Glue
a.ezdnscenter.com218.98.111.140AS133775 CHINATELECOM-Fujian-Xiamen-IDC1 - Xiamen, CN218.98.111.140
b.ezdnscenter.com183.253.57.210 211.99.99.58AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN AS134763 CT-DongGuan-IDC - CHINANET Guangdong province network, CN183.253.57.210 211.99.99.58

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: a.ezdnscenter.com, b.ezdnscenter.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 3 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS133775 (CHINATELECOM-Fujian-Xiamen-IDC1 - Xiamen, CN): 1 address; AS134763 (CT-DongGuan-IDC - CHINANET Guangdong province network, CN): 1 address; AS9808 (CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN): 1 address.
  • 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

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a.ezdnscenter.com 218.98.111.140NOERROR, 199 ms, authoritativenoyes / yesrefused-
b.ezdnscenter.com 183.253.57.210NOERROR, 180 ms, authoritativenoyes / yesrefused-
b.ezdnscenter.com 211.99.99.58NOERROR, 194 ms, authoritativenoyes / yesrefused-

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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1792652288 · primary a.ezdnscenter.com

Found

Primary (MNAME)
a.ezdnscenter.com
Contact (RNAME)
dnsadmin.ezdnscenter.com
Serial
1792652288
Refresh / retry
3600 s / 300 s
Expire
1209600 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
a.ezdnscenter.com (218.98.111.140)1792652288
b.ezdnscenter.com (183.253.57.210)1792652288
b.ezdnscenter.com (211.99.99.58)1792652288

Checks

  • ✓ Serial 1792652288 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 5m, expire 14d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a.ezdnscenter.com is one of the listed nameservers.
  • ✓ Contact dnsadmin@ezdnscenter.com #25
    The SOA RNAME dnsadmin.ezdnscenter.com means dnsadmin@ezdnscenter.com.
  • ✓ Timestamp serial #26
    The serial 1792652288 is a Unix timestamp (2026-10-22 06:58 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

6 records at the apex

Found

Read from
218.98.111.140:53
TypeValueTTL
NSa.ezdnscenter.com.86400
NSb.ezdnscenter.com.86400
A121.4.8.168600
MX5 mxbiz1.qq.com.600
MX5 mxbiz2.qq.com.600
TXT"e2fa31b2c77ac0a6055b023d9c875d2484e5f41463283093f645f047be1dd7d1"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, 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