wxfengxin.com

Checked 22 October 2026, 11:34 UTC · via 8.8.8.8
✗Problems found
22 passed 2 warnings 1 failed 6 info

Registration

info

.com generic · Dynadot Inc · expires 2027-06-07

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Dynadot Inc
Registered
7 June 2022
Last changed
18 July 2026
Expires
7 June 2027
Status
active
Registry nameservers
s1.xundns.com, s2.xundns.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 2027-06-07 #3
    The registration is valid until 2027-06-07 (227 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

s1.xundns.com, s2.xundns.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
s1.xundns.com, s2.xundns.com
NS in the zone
s1.xundns.com, s2.xundns.com
NameserverAddressesNetwork (AS)Glue
s1.xundns.com218.95.37.77 111.6.96.28 117.50.200.252 38.89.70.107 113.137.46.32 122.114.39.6 240e:cf:9000:13::17 240e:bf:b800:4300:0:2:1:8 2408:8621:0:42:e401:813:0:24 2409:8c44:1b00:601:1:1110:609:6028AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN AS23724 CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN AS63023 AS-GLOBALTELEHOST - GTHost, US AS134768 CHINANET-SHAANXI-CLOUD-BASE - CHINANET SHAANXI province Cloud Base network, CN AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN AS139201 CHINANET-Jiangxi-Jiujiang-IDC - Jiangxi Jiujiang IDC, CN AS134768 CHINANET-SHAANXI-CLOUD-BASE - CHINANET SHAANXI province Cloud Base network, CN AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN AS9808 CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN111.6.96.28 113.137.46.32 117.50.200.252 122.114.39.6 218.95.37.77 2408:8621:0:42:e401:813:0:24 2409:8c44:1b00:601:1:1110:609:6028 240e:bf:b800:4300:0:2:1:8 240e:cf:9000:13::17 38.89.70.107
s2.xundns.com169.197.142.81 42.236.74.175 61.163.30.167 210.16.160.201 42.240.163.164 2408:8722:1801:10:4:611:6303:167 240e:95d:3020:1e::52 2408:8720:806:204::24AS63023 AS-GLOBALTELEHOST - GTHost, US AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN AS146817 FXNET - Hubei Feixun Network Co., Ltd, CN AS58466 CT-Guangzhou-IDC - CHINANET Guangdong province network, CN AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN AS4134 CHINANET-BACKBONE - No.31,Jin-rong Street, CN AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN169.197.142.81 210.16.160.201 2408:8720:806:204::24 2408:8722:1801:10:4:611:6303:167 240e:95d:3020:1e::52 42.236.74.175 42.240.163.164 61.163.30.167

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: s1.xundns.com, s2.xundns.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 11 IPv4 /24s and 7 IPv6 /48s.
  • ✓ 9 autonomous systems #11
    The nameservers are spread over: AS134768 (CHINANET-SHAANXI-CLOUD-BASE - CHINANET SHAANXI province Cloud Base network, CN): 2 addresses; AS139201 (CHINANET-Jiangxi-Jiujiang-IDC - Jiangxi Jiujiang IDC, CN): 1 address; AS146817 (FXNET - Hubei Feixun Network Co., Ltd, CN): 1 address; AS23724 (CHINANET-IDC-BJ-AP - IDC, China Telecommunications Corporation, CN): 1 address; AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN): 2 addresses; AS4837 (CHINA169-Backbone - CHINA UNICOM China169 Backbone, CN): 6 addresses; AS58466 (CT-Guangzhou-IDC - CHINANET Guangdong province network, CN): 1 address; AS63023 (AS-GLOBALTELEHOST - GTHost, US): 2 addresses; AS9808 (CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd., CN): 2 addresses.
  • 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

fail

17 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
s1.xundns.com 218.95.37.77no responsenono / no--
s1.xundns.com 111.6.96.28NOERROR, 164 ms, authoritativenoyes / yesrefused-
s1.xundns.com 117.50.200.252NOERROR, 157 ms, authoritativenoyes / yesrefused-
s1.xundns.com 38.89.70.107NOERROR, 162 ms, authoritativenoyes / yesrefused-
s1.xundns.com 113.137.46.32NOERROR, 218 ms, authoritativenoyes / yesrefused-
s1.xundns.com 122.114.39.6NOERROR, 217 ms, authoritativenoyes / yesrefused-
s1.xundns.com 240e:cf:9000:13::17NOERROR, 216 ms, authoritativenoyes / yesrefused-
s1.xundns.com 240e:bf:b800:4300:0:2:1:8NOERROR, 173 ms, authoritativenoyes / yesrefused-
s1.xundns.com 2408:8621:0:42:e401:813:0:24NOERROR, 228 ms, authoritativenoyes / yesrefused-
s1.xundns.com 2409:8c44:1b00:601:1:1110:609:6028NOERROR, 223 ms, authoritativenoyes / yesrefused-
s2.xundns.com 169.197.142.81NOERROR, 144 ms, authoritativenoyes / yesrefused-
s2.xundns.com 42.236.74.175NOERROR, 150 ms, authoritativenoyes / yesrefused-
s2.xundns.com 61.163.30.167NOERROR, 199 ms, authoritativenoyes / yesrefused-
s2.xundns.com 210.16.160.201NOERROR, 222 ms, authoritativenoyes / yesrefused-
s2.xundns.com 42.240.163.164NOERROR, 176 ms, authoritativenoyes / yesrefused-
s2.xundns.com 2408:8722:1801:10:4:611:6303:167NOERROR, 144 ms, authoritativenoyes / yesrefused-
s2.xundns.com 240e:95d:3020:1e::52NOERROR, 239 ms, authoritativenoyes / yesrefused-
s2.xundns.com 2408:8720:806:204::24NOERROR, 200 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: s1.xundns.com (218.95.37.77): read udp 46.225.38.91:44701->218.95.37.77:53: i/o timeout.
    #14
  • ✓ 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

warn

serial 437896 · primary s1.xundns.com

Found

Primary (MNAME)
s1.xundns.com
Contact (RNAME)
nsadmin.xundns.com
Serial
437896
Refresh / retry
3600 s / 600 s
Expire
86400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
s1.xundns.com (111.6.96.28)437896
s1.xundns.com (117.50.200.252)437896
s1.xundns.com (38.89.70.107)437896
s1.xundns.com (113.137.46.32)437896
s1.xundns.com (122.114.39.6)437896
s1.xundns.com (240e:cf:9000:13::17)437896
s1.xundns.com (240e:bf:b800:4300:0:2:1:8)437896
s1.xundns.com (2408:8621:0:42:e401:813:0:24)437896
s1.xundns.com (2409:8c44:1b00:601:1:1110:609:6028)437896
s2.xundns.com (169.197.142.81)437896
s2.xundns.com (42.236.74.175)437896
s2.xundns.com (61.163.30.167)437896
s2.xundns.com (210.16.160.201)437896
s2.xundns.com (42.240.163.164)437896
s2.xundns.com (2408:8722:1801:10:4:611:6303:167)437896
s2.xundns.com (240e:95d:3020:1e::52)437896
s2.xundns.com (2408:8720:806:204::24)437896

Checks

  • ✓ Serial 437896 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 10m, expire 1d, negative TTL 10m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver s1.xundns.com is one of the listed nameservers.
  • ✓ Contact nsadmin@xundns.com #25
    The SOA RNAME nsadmin.xundns.com means nsadmin@xundns.com.
  • ✓ Counter serial #26
    The serial 437896 is a plain counter.

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

3 records at the apex

Found

Read from
111.6.96.28:53
TypeValueTTL
SOAs1.xundns.com. nsadmin.xundns.com. 437896 3600 600 86400 6007200
NSs1.xundns.com.7200
NSs2.xundns.com.7200

Checks

  • ✓ TTLs within range #32
    TTLs: NS 2h. The NS TTL at the parent is 2d and in the zone 2h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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