btdair.com - robtex.com
btdair.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 121.15.2.131🇨🇳 CHINANET-BACKBONE121.8.0.0/13 China Telecom Network | ||||||
| NS | ns3.01isp.com ⭐ ⚠️ Not in zone NS records | ||||||
| A | 42.240.142.46🇨🇳 CHINANET-Guangdong-GuangZhou-IDC42.240.128.0/20 Guangzhou IDC of ChinaUnicom | ||||||
| NS | ns4.01isp.net ⚠️ Not in zone NS records | ||||||
| A | 47.239.41.106🇭🇰 Alibaba-Cloud47.239.0.0/16 Proxy-registered route object | ||||||
| NS | ns7.01isp.com ⚠️ Not in parent delegation | ||||||
| A | 42.240.142.46🇨🇳 CHINANET-Guangdong-GuangZhou-IDC42.240.128.0/20 Guangzhou IDC of ChinaUnicom | ||||||
| NS | ns8.01isp.net ⚠️ Not in parent delegation | ||||||
| A | 47.239.41.106🇭🇰 Alibaba-Cloud47.239.0.0/16 Proxy-registered route object | ||||||
| MX | hzmx01.mxmail.netease.com ⭐ | ||||||
| A | 47.251.71.119🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object | ||||||
| A | 47.251.84.126🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object | ||||||
| MX | hzmx02.mxmail.netease.com(10) | ||||||
| A | 47.251.71.119🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object | ||||||
| A | 47.251.84.126🇺🇸 Alibaba-Cloud47.251.0.0/17 Proxy-registered route object | ||||||
| TXT | v=spf1 include:spf.163.com -all | ||||||
| SOA | ns3.01isp.comadmin@now.cn 2026-03-19 #1 | ||||||
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=1771291435 | ||||||
Same first word
btdair.com |
Similar names
DNS History
14 records (7 active, 7 former)
○NSf1g1ns1.dnspod.net2015-05-13 → 2016-02-05 · 4 obs
● 2016-02-05 09:39:04
○ 2016-05-03 16:55:26
○ 2026-03-23 04:04:42
○NSf1g1ns2.dnspod.net2015-05-13 → 2016-02-05 · 4 obs
● 2016-02-05 09:39:04
○ 2016-05-03 16:55:26
○ 2026-03-23 04:04:42
●NSns3.01isp.com2016-05-03 → 2026-03-23 · 3 obs
● 2016-05-03 16:55:26
● 2026-03-23 04:04:42
●NSns4.01isp.net2016-05-03 → 2026-03-23 · 3 obs
● 2016-05-03 16:55:26
● 2026-03-23 04:04:42
●NSns7.01isp.com2026-03-21 → 2026-03-23 · 3 obs
● 2026-03-21 04:33:30
● 2026-03-23 04:04:42
●NSns8.01isp.net2026-03-21 → 2026-03-23 · 3 obs
● 2026-03-21 04:33:30
● 2026-03-23 04:04:42
●MXhzmx01.mxmail.netease.com2018-12-23 → 2026-03-23 · 3 obs
● 2018-12-23 01:49:20
● 2026-03-23 04:04:42
●MXhzmx02.mxmail.netease.com2018-12-23 → 2026-03-23 · 3 obs
● 2018-12-23 01:49:20
● 2026-03-23 04:04:42
○MXmx03.corpmail.cn2015-05-13 → 2016-02-05 · 4 obs
● 2016-02-05 09:39:04
○ 2016-05-03 16:55:26
○ 2026-03-23 04:04:42
○A103.28.44.652015-05-13 → 2016-02-05 · 4 obs
● 2016-02-05 09:39:04
○ 2016-05-03 16:55:26
○ 2026-03-23 04:04:42
○A120.77.45.2382018-12-23 → 2018-12-23 · 4 obs
● 2018-12-23 01:49:20
○ 2026-03-21 04:33:30
○ 2026-03-23 04:04:42
●A121.15.2.1312026-03-21 → 2026-03-23 · 3 obs
● 2026-03-21 04:33:30
● 2026-03-23 04:04:42
○A121.201.20.1532016-05-03 → 2016-08-24 · 5 obs
● 2016-05-03 16:55:26
● 2016-08-24 14:55:44
○ 2016-12-21 23:45:12
○ 2026-03-23 04:04:42
○A121.201.51.322016-12-21 → 2016-12-21 · 4 obs
● 2016-12-21 23:45:12
○ 2018-12-23 01:49:20
○ 2026-03-23 04:04:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net, h.gtld-servers.net... | - |
| btdair.com | ns3.01isp.com, ns4.01isp.net | 1 record |
✅ Authoritative Response
Server:42.240.142.46
NS records: ns3.01isp.com, ns4.01isp.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for btdair.com (unsigned zone)
⏱️ Timing
Total: 1364ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 121.15.2.131 |
| NS | 2 | ns8.01isp.net, ns7.01isp.com |
| MX | 2 | hzmx01.mxmail.netease.com (pri: 5), hzmx02.mxmail.netease.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.163.com -all |
| SOA | 1 | ns3.01isp.com admin.now.cn |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns3.01isp.com)
Analysis
IP Addresses
btdair.com resolves to one IP number: 121.15.2.131.
Other host names such as btdexp.com and btd56.com share IP numbers with btdair.com.
Name Servers
btdair.com is delegated to four name servers: ns3.01isp.com, ns7.01isp.com, ns4.01isp.net and ns8.01isp.net.
btdair.com at least partially shares name servers with other domains, for instance yljx.com, acusy.com, goldfxi.com, ncc-edu.hk and nk.vc.
These name servers are commonly used alongside verification-30t7kid8.ns3.dan.hosting and ns4001.01isp.net.
Host names with a single IP:
ns3.01isp.com points to 42.240.142.46.
ns7.01isp.com points to 42.240.142.46.
ns4.01isp.net points to 47.239.41.106.
ns8.01isp.net points to 47.239.41.106.
Host names pointing to 42.240.142.46: ns3.01isp.com and ns7.01isp.com.
Host names pointing to 47.239.41.106: ns4.01isp.net and ns8.01isp.net.
Mail Servers
Two mail servers handle btdair.com: hzmx01.mxmail.netease.com and hzmx02.mxmail.netease.com.
btdair.com shares the same mail server setup as other domains, for instance srdpcba.com, xkpx.com, sowend.com, mail.chaosin.com and gbsystem.com.
btdair.com shares at least some mail servers with other domains, including guang-yuan.com, qzhuihua.com, songchuancar.com and fitpie.com.
Host names with two IP numbers:
hzmx01.mxmail.netease.com points to 47.251.71.119 and 47.251.84.126
hzmx02.mxmail.netease.com points to 47.251.71.119 and 47.251.84.126
Host names pointing to 47.251.71.119: hzmx01.mxmail.netease.com and hzmx02.mxmail.netease.com
Host names pointing to 47.251.84.126: hzmx01.mxmail.netease.com and hzmx02.mxmail.netease.com