yy.com

Checked 22 October 2026, 11:42 UTC · via 8.8.8.8
!Passed with warnings
19 passed 6 warnings 0 failed 6 info

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2030-01-19

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered
18 January 1994
Last changed
17 May 2024
Expires
19 January 2030
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.yylivens.com, ns2.yylivens.com, ns3.yylivens.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 2030-01-19 #3
    The registration is valid until 2030-01-19 (1184 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns1.yylivens.com, ns2.yylivens.com, ns3.yylivens.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.yylivens.com, ns2.yylivens.com, ns3.yylivens.com
NS in the zone
ns1.yylivens.com, ns2.yylivens.com, ns3.yylivens.com
NameserverAddressesNetwork (AS)Glue
ns1.yylivens.com47.242.206.15AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN106.38.197.63 122.193.201.47 123.125.184.158 183.36.121.122 47.243.114.166 58.215.180.47 58.251.123.250
ns2.yylivens.com47.242.206.15AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN106.38.197.63 122.193.201.47 123.125.184.158 183.36.121.122 47.243.114.166 58.215.180.47 58.251.123.250
ns3.yylivens.com47.242.206.15AS45102 ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN106.38.197.63 122.193.201.47 123.125.184.158 183.36.121.122 47.243.114.166 58.215.180.47 58.251.123.250

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.yylivens.com, ns2.yylivens.com, ns3.yylivens.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1.yylivens.com (glue 106.38.197.63, 122.193.201.47, 123.125.184.158, 183.36.121.122, 47.243.114.166, 58.215.180.47, 58.251.123.250, zone 47.242.206.15); ns2.yylivens.com (glue 106.38.197.63, 122.193.201.47, 123.125.184.158, 183.36.121.122, 47.243.114.166, 58.215.180.47, 58.251.123.250, zone 47.242.206.15); ns3.yylivens.com (glue 106.38.197.63, 122.193.201.47, 123.125.184.158, 183.36.121.122, 47.243.114.166, 58.215.180.47, 58.251.123.250, zone 47.242.206.15). Update the glue at your registrar.
    #8
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 47.242.206.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS45102 (ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd., CN): 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

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.yylivens.com 47.242.206.15NOERROR, 284 ms, authoritativenoyes / yesrefuseddw server.
ns2.yylivens.com 47.242.206.15NOERROR, 290 ms, authoritativenoyes / yesrefuseddw server.
ns3.yylivens.com 47.242.206.15NOERROR, 219 ms, authoritativenoyes / yesrefuseddw server.

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.yylivens.com: "dw server."; ns2.yylivens.com: "dw server."; ns3.yylivens.com: "dw server.".
    #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 2012599901 · primary ns1.yylivens.com

Found

Primary (MNAME)
ns1.yylivens.com
Contact (RNAME)
dns.yy.com
Serial
2012599901
Refresh / retry
900 s / 180 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns1.yylivens.com (47.242.206.15)2012599901
ns2.yylivens.com (47.242.206.15)2012599901
ns3.yylivens.com (47.242.206.15)2012599901

Checks

  • ✓ Serial 2012599901 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 15m is outside 20m–1d; negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 15m, retry 3m, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.yylivens.com is one of the listed nameservers.
  • ✓ Contact dns@yy.com #25
    The SOA RNAME dns.yy.com means dns@yy.com.
  • ✓ Timestamp serial #26
    The serial 2012599901 is a Unix timestamp (2033-10-10 23:31 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

warn

16 records at the apex

Found

Read from
47.242.206.15:53
TypeValueTTL
SOAns1.yylivens.com. dns.yy.com. 2012599901 900 180 1209600 180120
NSns2.yylivens.com.120
NSns3.yylivens.com.120
NSns1.yylivens.com.120
A125.94.240.8260
A221.228.202.16960
MX20 mail.yy.com.120
TXT"z33bl54ts1bmkmn917bnkd507qtwtd0f"120
TXT"slkv5dtbcm687rrjg4p17z3rzx8xls24"120
TXT"d2j6pdyjp89lmjqwlc00894tqnm32g7z"120
TXT"c031ctflmv9zptspdg1m98hxlb99z12k"120
TXT"google-site-verification=-Qe84VGUYURp5LoRaarJFQVQIPywf848rQMk9y3Vh3Q"120
TXT"7g72q0ydhb9v9hcjxltrc6ks5sj655x7"120
TXT"v=spf1 ip4:113.108.82.190 ip4:163.177.75.126 ip4:183.62.105.211 ip4:157.255.231.131 ip4:125.94.240.85 ip4:163.177.159.150 ip4:121.11.218.253 ip4:121.11.218.254 ip4:27.45.164.10 ip4:27.45.164.11 ip4:125.94.240.3 ip4:27.45.165.188 include:spf.yy.com -all"120
TXT"whwn1wqdhw9slhx5fhntzyt4t0dktq1m"120
TXT"yyj1ksy41lsvgczcbgdd26gcc887zlbd"120

Checks

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