bctb.edu.cn - robtex.com
bctb.edu.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.bctb.edu.cn ⭐ | ||||||
| NS | ns2.bctb.edu.cn | ||||||
| MX | mxbiz1.qq.com ⭐ | ||||||
| MX | mxbiz2.qq.com(10) | ||||||
| TXT | v=spf1 include:spf.mail.qq.com ~all | ||||||
| SOA | ns1.bctb.edu.cnliqi@bctb.edu.cn serial=1777340159 | ||||||
edu.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns2.edu.cn ⭐ | ||||||
| NS | dns.edu.cn | ||||||
| NS | dns3.edu.cn | ||||||
| NS | ns2.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | ns4.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | ns5.cernet.net ⚠️ Not in parent delegation | ||||||
| SOA | dns.edu.cnhostmaster@net.edu.cn 2026-05-12 #15 | ||||||
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●NSns1.bctb.edu.cn2026-03-30 → 2026-05-12 · 2 obs
● 2026-03-30 19:53:50
● 2026-05-12 14:27:26
● 2026-05-12 14:27:26
●NSns2.bctb.edu.cn2026-03-30 → 2026-05-12 · 2 obs
● 2026-03-30 19:53:50
● 2026-05-12 14:27:26
● 2026-05-12 14:27:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| edu.cn | dns.edu.cn, ns2.cernet.net, ns4.cernet.net, ns5.cernet.net... | 6 records |
| bctb.edu.cn | ns2.bctb.edu.cn, ns1.bctb.edu.cn | 4 records |
✅ Authoritative Response
Server:42.247.55.101
NS records: ns2.bctb.edu.cn, ns1.bctb.edu.cn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for bctb.edu.cn (unsigned zone)
⏱️ Timing
Total: 2794ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.bctb.edu.cn, ns2.bctb.edu.cn |
| MX | 2 | mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.mail.qq.com ~all |
| SOA | 1 | ns1.bctb.edu.cn liqi.bctb.edu.cn |
📌 Glue Records Collected
Total: 10
In-bailiwick: 10 (dns.edu.cn, dns.edu.cn, dns2.edu.cn...)
Analysis
Name Servers
Two name servers ns1.bctb.edu.cn and ns2.bctb.edu.cn handle the delegation for bctb.edu.cn.
Mail Servers
Two mail servers handle bctb.edu.cn: mxbiz1.qq.com and mxbiz2.qq.com.
bctb.edu.cn shares the same mail server setup as other domains, including bridata.com, sinochair.com, yunsijia.com, fugland.com and unitlink.cn.
bctb.edu.cn shares some mail servers with other domains, at least partially, for instance foamproducts.cn, china-crane.com, az.klxjz.cn and youngm.cn.