iqilu.com

Checked 22 October 2026, 09:21 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 1 failed 5 info

Registration

info

.com generic · Bizcn.com, Inc. · expires 2034-02-27

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Bizcn.com, Inc.
Registered
27 February 2007
Last changed
26 March 2024
Expires
27 February 2034
Status
client transfer prohibited
Registry nameservers
ns4.iqilu.com, ns5.iqilu.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 2034-02-27 #3
    The registration is valid until 2034-02-27 (2684 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

ns4.iqilu.com, ns5.iqilu.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns4.iqilu.com, ns5.iqilu.com
NS in the zone
ns4.iqilu.com, ns5.iqilu.com
NameserverAddressesNetwork (AS)Glue
ns4.iqilu.com58.56.63.2AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN58.56.63.2
ns5.iqilu.com119.164.219.2AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN119.164.219.2

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns4.iqilu.com, ns5.iqilu.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: ns4.iqilu.com, ns5.iqilu.com.
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN): 1 address; AS4837 (CHINA169-Backbone - CHINA UNICOM China169 Backbone, 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

fail

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns4.iqilu.com 58.56.63.2NOERROR, 237 ms, authoritativenono / yesrefused-
ns5.iqilu.com 119.164.219.2NOERROR, 141 ms, authoritativenono / yesrefusednone

Checks

  • ✓ All respond #14
    All 2 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: ns5.iqilu.com: "none".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns4.iqilu.com (58.56.63.2): dial tcp 58.56.63.2:53: i/o timeout; ns5.iqilu.com (119.164.219.2): dial tcp 119.164.219.2:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026101703 · primary ns4.iqilu.com

Found

Primary (MNAME)
ns4.iqilu.com
Contact (RNAME)
support.iqilu.com
Serial
2026101703
Refresh / retry
10800 s / 1800 s
Expire
604800 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
ns4.iqilu.com (58.56.63.2)2026101703
ns5.iqilu.com (119.164.219.2)2026101703

Checks

  • ✓ Serial 2026101703 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 3h, retry 30m, expire 7d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns4.iqilu.com is one of the listed nameservers.
  • ✓ Contact support@iqilu.com #25
    The SOA RNAME support.iqilu.com means support@iqilu.com.
  • ✓ Date-based serial #26
    The serial 2026101703 follows the YYYYMMDDnn convention (2026-10-17).

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

8 records at the apex

Found

Read from
58.56.63.2:53
TypeValueTTL
SOAns4.iqilu.com. support.iqilu.com. 2026101703 10800 1800 604800 60172800
NSns4.iqilu.com.3600
NSns5.iqilu.com.3600
AAAA2408:8719:84ff:fd10::2330
MX10 mxbiz2.qq.com.600
MX5 mxbiz1.qq.com.600
TXT"google-site-verification=46PprZJvyB6Tl7qr-IjOnlujQbyueq-CIZONntgQsB8"300
TXT"_globalsign-domain-verification=S5yMpupaFwMImMMfyTf7SFc4vfrkHhLhL3BfOtxz7v"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: AAAA (30s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1h; 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