sw51.com - robtex.com
sw51.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 110.173.196.1🇨🇳 Alibaba-Cloud110.173.196.0/24 Alibaba (US) Technology Co., Ltd. | ||||||
| NS | dns1.4cun.com ⭐ | ||||||
| A | 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8🇨🇳 Alibaba-Cloud2408:4005::/33 | ||||||
| A | 61.172.183.74🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC | ||||||
| NS | dns.4cun.com ⚠️ Not in zone NS records | ||||||
| NS | dns2.51dns.top ⚠️ Not in zone NS records | ||||||
| A | 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8🇨🇳 Alibaba-Cloud2408:4005::/33 | ||||||
| A | 219.138.102.210🇨🇳 CHINATELECOM-HUBEI-YICHANG-IDC219.138.102.0/24 yichang | ||||||
| MX | mxdomain.qq.com ⭐ | ||||||
| TXT | v=spf1 include:spf.mail.qq.com ~all | ||||||
| SOA | dns.4cun.comadmin@sw51.com serial=1773823152 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1786484014 | ||||||
Subdomains
Same first word
sw51.com |
Similar names
DNS History
10 records (5 active, 5 former)
●NSdns.4cun.com2015-06-10 → 2026-08-11 · 3 obs
● 2015-06-10 10:28:22
● 2026-08-11 21:46:36
○NSdns.cnmsn.net2008-01-25 → 2008-01-25 · 3 obs
○ 2015-06-10 10:28:22
○ 2026-08-11 21:46:36
●NSdns1.4cun.com2026-05-23 → 2026-08-11 · 3 obs
● 2026-05-23 21:32:54
● 2026-08-11 21:46:36
○NSdns1.zgsj.com2008-01-25 → 2008-01-25 · 3 obs
○ 2015-06-10 10:28:22
○ 2026-08-11 21:46:36
●NSdns2.51dns.top2026-05-23 → 2026-08-11 · 3 obs
● 2026-05-23 21:32:54
● 2026-08-11 21:46:36
○NSdns2.zgsj.com2008-01-25 → 2008-01-25 · 3 obs
○ 2015-06-10 10:28:22
○ 2026-08-11 21:46:36
○MXmail.sw51.com2008-01-25 → 2008-01-25 · 3 obs
○ 2015-06-10 10:28:22
○ 2026-08-11 21:46:36
●MXmxdomain.qq.com2016-07-17 → 2026-08-11 · 3 obs
● 2016-07-17 18:59:30
● 2026-08-11 21:46:36
●A110.173.196.12015-06-10 → 2026-08-11 · 3 obs
● 2015-06-10 10:28:22
● 2026-08-11 21:46:36
○A60.190.222.2442008-01-25 → 2008-01-25 · 3 obs
○ 2015-06-10 10:28:22
○ 2026-08-11 21:46:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| sw51.com | dns1.4cun.com, dns2.51dns.top | 2 records |
✅ Authoritative Response
Server:61.172.183.74
NS records: dns1.4cun.com, dns2.51dns.top
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sw51.com (unsigned zone)
⏱️ Timing
Total: 1684ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 110.173.196.1 |
| MX | 1 | mxdomain.qq.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.mail.qq.com ~all |
| SOA | 1 | dns.4cun.com admin.sw51.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (dns1.4cun.com, dns1.4cun.com)
Analysis
Hierarchy
mail.sw51.com and www.sw51.com each fall under sw51.com as their parent domain.
IP Addresses
sw51.com resolves to just one IP address, 110.173.196.1.
Two other host names, along with ditan361.com, ynrubber.cn and gzyxcl.cn, also share IP numbers with sw51.com.
Name Servers
sw51.com has three name servers — dns1.4cun.com, dns.4cun.com and dns2.51dns.top.
sw51.com partially shares its NS delegation with several other domains, including longv.cn, tkfoot2.com, nictoronto.com and two others.
In DNS configurations, these name servers often share authority with dns3.4cun.com, dns4.51dns.top, dns2.4cun.com and 7 other name servers.
dns1.4cun.com has IP addresses 61.172.183.74 and 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8. dns2.51dns.top has IP addresses 219.138.102.210 and 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8. Note that 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8 appears in both.
The host names dns1.4cun.com and dns2.51dns.top both resolve to 2408:4005:3dc:af00:a6be:339e:a1a0:d2b8 IP addresses.
Mail Servers
The sole mail server for sw51.com is mxdomain.qq.com.
Among the domains sharing a mail server setup with sw51.com are cnsp.cn, vpsbu.com, emshost.net and two others.
There is at least a partial MX overlap between sw51.com and other domains, including esharetrade.com, 61qt.cn, mini3688.com and two others.
The mail servers mxn.mxhichina.com and mxw.mxhichina.com regularly co-occur with these mail servers.