irfs.cn - robtex.com
irfs.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns1.4cun.com ⚠️ Not in zone NS records | ||||||
| A | 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7🇨🇳 Alibaba-Cloud2408:4005::/33 | ||||||
| A | 61.172.183.74🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC | ||||||
| NS | dns2.51dns.top ⚠️ Not in zone NS records | ||||||
| A | 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7🇨🇳 Alibaba-Cloud2408:4005::/33 | ||||||
| A | 219.138.102.210🇨🇳 CHINATELECOM-HUBEI-YICHANG-IDC219.138.102.0/24 yichang | ||||||
cn
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.cn ⭐ | ||||||
| NS | b.dns.cn | ||||||
| NS | c.dns.cn | ||||||
| NS | d.dns.cn | ||||||
| NS | e.dns.cn | ||||||
| NS | ns.cernet.net ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2034660826 | ||||||
Same first word
Similar names
DNS History
12 records (2 active, 10 former)
●NSdns1.4cun.com2026-04-08 → 2026-04-12 · 3 obs
● 2026-04-08 21:41:14
● 2026-04-12 02:34:58
●NSdns2.51dns.top2026-04-08 → 2026-04-12 · 3 obs
● 2026-04-08 21:41:14
● 2026-04-12 02:34:58
○NSdns21.hichina.com2020-01-17 → 2020-01-17 · 4 obs
● 2020-01-17 03:57:50
○ 2021-01-01 00:41:22
○ 2026-04-12 02:34:58
○NSdns22.hichina.com2020-01-17 → 2020-01-17 · 4 obs
● 2020-01-17 03:57:50
○ 2021-01-01 00:41:22
○ 2026-04-12 02:34:58
○NSjm1.dns.com2021-01-01 → 2021-01-01 · 4 obs
● 2021-01-01 00:41:22
○ 2026-04-08 21:41:14
○ 2026-04-12 02:34:58
○NSjm2.dns.com2021-01-01 → 2021-01-01 · 4 obs
● 2021-01-01 00:41:22
○ 2026-04-08 21:41:14
○ 2026-04-12 02:34:58
○NSwww.irfs.cn2016-07-13 → 2017-02-20 · 4 obs
● 2017-02-20 15:28:42
○ 2020-01-17 03:57:50
○ 2026-04-12 02:34:58
○MXio.bouncemx.com2016-07-13 → 2016-07-13 · 3 obs
○ 2020-01-17 03:57:50
○ 2026-04-12 02:34:58
○A47.91.170.2222020-01-17 → 2020-01-17 · 4 obs
● 2020-01-17 03:57:50
○ 2021-01-01 00:41:22
○ 2026-04-12 02:34:58
○A70.39.84.2462017-02-20 → 2017-02-20 · 4 obs
● 2017-02-20 15:28:42
○ 2020-01-17 03:57:50
○ 2026-04-12 02:34:58
○A70.39.84.2472016-07-13 → 2016-07-13 · 3 obs
○ 2017-02-20 15:28:42
○ 2026-04-12 02:34:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| irfs.cn | dns1.4cun.com, dns2.51dns.top | - |
✅ Authoritative Response
Server:2408:4005:3dc:af00:a6be:339e:a1a0:ceb7
NS records: dns1.4cun.com, dns2.51dns.top
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for irfs.cn (unsigned zone)
⏱️ Timing
Total: 4263ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
irfs.cn is delegated to two name servers: dns1.4cun.com and dns2.51dns.top.
irfs.cn shares the same name server setup as other domains, for example odessa.cn, uidi.cn, ge03.cn, ihpu.cn and bmserver.cn.
irfs.cn at least partially shares name servers with other domains, for instance tcwdyb.com, gdfii.org, xoss.net, jjzjzx.com and shengwei.cc.
These name servers are often used with dns.4cun.com and dns2.4cun.com.
Host names with two IP numbers:
dns1.4cun.com points to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7 and 61.172.183.74.
dns2.51dns.top points to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7 and 219.138.102.210.
Names pointing to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7: dns1.4cun.com and dns2.51dns.top.