itb.ac.cn - robtex.com
itb.ac.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.hfcas.ac.cn ⭐ | ||||||
| NS | ns.aiofm.ac.cn ⚠️ Not in parent delegation | ||||||
| A | 202.127.201.1🇨🇳 CSTNET-AS-AP202.127.200.0/21 Route origin from CSTNET | ||||||
| PTR | ns.aiofm.ac.cn | ||||||
| NS | ns.hfcas.ac.cn | ||||||
| A | 2400:dd0d:1001:2060::3🇨🇳 CSTNET-AS-AP2400:dd0d:1001::/48 | ||||||
| A | 202.127.207.1🇨🇳 CSTNET-AS-AP202.127.200.0/21 Route origin from CSTNET | ||||||
| PTR | hfcas.ac.cn | ||||||
| PTR | ns.hfcas.ac.cn | ||||||
| MX | mx.cstnet.cn ⭐ | ||||||
| A | 159.226.251.12🇨🇳 CSTNET-AS-AP159.226.0.0/16 CSTNET's IP | ||||||
| PTR | mx.cstnet.cn | ||||||
| TXT | v=spf1 include:spf.mail.cstnet.cn -all | ||||||
| SOA | ns.hfcas.ac.cnhostmaster@hfcas.ac.cn serial=18 | ||||||
ac.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | c.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | cns.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | d.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | e.dns.cn ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2027268758 | ||||||
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●NSns.aiofm.ac.cn2026-04-30 → 2026-05-09 · 2 obs
● 2026-05-09 03:00:56
●NSns.hfcas.ac.cn2026-04-30 → 2026-05-09 · 2 obs
● 2026-05-09 03:00:56
●NSns1.hfcas.ac.cn2026-04-30 → 2026-05-09 · 2 obs
● 2026-05-09 03:00:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | b.dns.cn, c.dns.cn, e.dns.cn, a.dns.cn... | - |
| itb.ac.cn | ns.hfcas.ac.cn, ns1.hfcas.ac.cn | 2 records |
✅ Authoritative Response
Server:202.127.207.1
NS records: ns.hfcas.ac.cn, ns1.hfcas.ac.cn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for itb.ac.cn (unsigned zone)
⏱️ Timing
Total: 3593ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns.hfcas.ac.cn, ns1.hfcas.ac.cn... |
| MX | 1 | mx.cstnet.cn (pri: 0) |
| TXT | 1 | v=spf1 include:spf.mail.cstnet.cn -all |
| SOA | 1 | ns.hfcas.ac.cn hostmaster.hfcas.ac.cn |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns.hfcas.ac.cn, ns1.hfcas.ac.cn)
Analysis
Name Servers
itb.ac.cn is delegated to three name servers ns.aiofm.ac.cn, ns1.hfcas.ac.cn and ns.hfcas.ac.cn.
itb.ac.cn at least partially shares name servers with other domains, for instance iim.ac.cn, 207.127.202.in-addr.arpa, 205.127.202.in-addr.arpa, hmfl.ac.cn and 201.127.202.in-addr.arpa.
Host names with a single IP:
ns.aiofm.ac.cn points to 202.127.201.1.
Host names with two IPs:
ns.hfcas.ac.cn points to 2400:dd0d:1001:2060::3 and 202.127.207.1.
Mail Servers
itb.ac.cn is handled by a single mail server, mx.cstnet.cn.
itb.ac.cn shares the same mail server setup as other domains, for instance cspm.com.cn, ntsc.ac.cn, nmdc.cn, lreis.ac.cn and ms.ccb.ac.cn.
mx.cstnet.cn resolves to IP 159.226.251.12.