soso.com

Checked 22 October 2026, 10:46 UTC · via 8.8.8.8
✗Problems found
22 passed 4 warnings 1 failed 4 info

Registration

info

.com generic · MarkMonitor Information Technology (Shanghai) Co., Ltd. · expires 2034-02-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Information Technology (Shanghai) Co., Ltd.
Registered
9 February 1998
Last changed
27 October 2025
Expires
8 February 2034
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.sogou.com, ns2.sogou.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 2034-02-08 #3
    The registration is valid until 2034-02-08 (2665 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.sogou.com, ns2.sogou.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.sogou.com, ns2.sogou.com
NS in the zone
ns1.sogou.com, ns2.sogou.com
NameserverAddressesNetwork (AS)Glue
ns1.sogou.com101.226.101.142AS4811 CHINANET-SHANGHAI-MAN - China Telecom (Group), CN101.226.101.142
ns2.sogou.com43.137.30.21AS45090 TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN43.137.30.21

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.sogou.com, ns2.sogou.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS45090 (TENCENT-NET-AP - Shenzhen Tencent Computer Systems Company Limited, CN): 1 address; AS4811 (CHINANET-SHANGHAI-MAN - China Telecom (Group), 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

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.sogou.com 101.226.101.142NOERROR, 160 ms, authoritativenoyes / norefused-
ns2.sogou.com 43.137.30.21NOERROR, 200 ms, authoritativenoyes / norefused-

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.
  • ✓ 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.
  • !
    No EDNS
    These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns1.sogou.com (101.226.101.142), ns2.sogou.com (43.137.30.21).
    #20
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 1788322722 · primary ns1.sogou.com

Found

Primary (MNAME)
ns1.sogou.com
Contact (RNAME)
dnsadmin.sogou-inc.com
Serial
1788322722
Refresh / retry
300 s / 180 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns1.sogou.com (101.226.101.142)1788322722
ns2.sogou.com (43.137.30.21)1788322722

Checks

  • ✓ Serial 1788322722 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 5m is outside 20m–1d; negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 5m, retry 3m, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.sogou.com is one of the listed nameservers.
  • ✓ Contact dnsadmin@sogou-inc.com #25
    The SOA RNAME dnsadmin.sogou-inc.com means dnsadmin@sogou-inc.com.
  • ✓ Timestamp serial #26
    The serial 1788322722 is a Unix timestamp (2026-09-02 04:18 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

fail

10 records at the apex

Found

Read from
101.226.101.142:53
TypeValueTTL
SOAns1.sogou.com. dnsadmin.sogou-inc.com. 1788322722 300 180 1209600 180600
NSns1.sogou.com.600
NSns2.sogou.com.600
MX5 mxbiz1.qq.com.7200
MX5 mxbiz2.qq.com.7200
TXT"hdtw3tf00m108l29bpzdg6zjfhw49jsv"7200
TXT"v=spf1 ip4:113.142.10.0/25 ~all"7200
TXT"globalsign-domain-verification=NEyp5UmEU6jZnKbGy_5zU2HGmjatSqcHTQSlut_C_B"7200
TXT"kfyv0pdl496nt736h02l4f1jzmwflcqb"7200
TXT"_i5si6qqzdqwld3pttxd6zxd00hf38mb"7200

Checks

  • ✓ TTLs within range #32
    TTLs: MX 2h, NS 10m. The NS TTL at the parent is 2d and in the zone 10m; resolvers may use either.
  • ✗
    CNAME at the apex
    The zone apex is a CNAME to sh2.general.proxy.sogou.com. A CNAME can't coexist with the SOA and NS records (RFC 1034); use your provider's ALIAS/flattening feature instead.
    #33
  • ✓ 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