study-hall.cn - robtex.com

study-hall.cn

DNSSEC⚠️ Not signed

cn

DNSSEC🔒 Signed (DS record present)
NSa.dns.cn ⭐
NSb.dns.cn
NSc.dns.cn
NSd.dns.cn
NSe.dns.cn
NSns.cernet.net ⚠️ Not in parent delegation
SOAa.dns.cnroot@cnnic.cn serial=2035149846

DNS History

6 records (0 active, 6 former)

2020202120222023202420252026NSdm1.longmingdns.comdm2.longmingdns.comns4.dnsdun.comns4.dnsdun.netA156.235.129.217192.186.43.100
○NSdm1.longmingdns.com2026-02-20 → 2026-03-15 · 5 obs
○ 2019-04-01 02:52:38
● 2026-02-20 16:16:58
● 2026-03-15 14:49:10
○ 2026-04-18 02:03:04
○ 2026-08-06 21:30:22
○NSdm2.longmingdns.com2026-02-20 → 2026-03-15 · 5 obs
○ 2019-04-01 02:52:38
● 2026-02-20 16:16:58
● 2026-03-15 14:49:10
○ 2026-04-18 02:03:04
○ 2026-08-06 21:30:22
○NSns4.dnsdun.com2019-04-01 → 2019-04-01 · 3 obs
● 2019-04-01 02:52:38
○ 2026-02-20 16:16:58
○ 2026-08-06 21:30:22
○NSns4.dnsdun.net2019-04-01 → 2019-04-01 · 3 obs
● 2019-04-01 02:52:38
○ 2026-02-20 16:16:58
○ 2026-08-06 21:30:22
○A156.235.129.2172026-02-20 → 2026-03-15 · 5 obs
○ 2019-04-01 02:52:38
● 2026-02-20 16:16:58
● 2026-03-15 14:49:10
○ 2026-04-18 02:03:04
○ 2026-08-06 21:30:22
○A192.186.43.1002019-04-01 → 2019-04-01 · 3 obs
● 2019-04-01 02:52:38
○ 2026-02-20 16:16:58
○ 2026-08-06 21:30:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cne.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn...-

✅ Authoritative Response

Server:203.119.27.1

NS records: e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn, b.dns.cn

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 3621ms | Queries: -

📄 Records

TypeCountSample Data