21cn.co - robtex.com
21cn.co
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.cnolnic.net ⚠️ Not in zone NS records | ||||||
| A | 240c:4082:0:5d80::2🇨🇳 Baidu240c:4082::/32 | ||||||
| A | 106.13.136.254🇨🇳 Baidu106.13.128.0/19 AS38365 | ||||||
| A | 182.61.7.97🇨🇳 Baidu182.61.0.0/19 | ||||||
| NS | ns2.cnolnic.net ⚠️ Not in zone NS records | ||||||
| A | 240c:4081:8000:1702::3🇨🇳 Baidu240c:4081::/32 | ||||||
| A | 106.12.41.177🇨🇳 Baidu106.12.32.0/19 | ||||||
| A | 180.76.132.69🇨🇳 Baidu180.76.128.0/19 | ||||||
co
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.registrydns.co | ||||||
| NS | b.registrydns.co | ||||||
| NS | c.registrydns.co | ||||||
| NS | d.registrydns.co | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=1759707967 | ||||||
Same first word
Similar names
nc21.com.ua |
c21n.jp |
cn21.com |
n1c2.com |
c21n.com |
c12n.com |
12cn.cn |
n21c.com |
nc21.jp |
n1c2.net |
cn21.com.cn |
12nc.com.ua |
nc12.com |
nc21.com |
DNS History
14 records (2 active, 12 former)
○NSdns1.name-services.com2015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○NSdns2.name-services.com2015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○NSdns3.name-services.com2015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○NSdns4.name-services.com2015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○NSdns5.name-services.com2015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○NSns1.bodis.com2021-02-28 → 2021-08-31 · 5 obs
○ 2016-12-30 22:00:08
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
●NSns1.cnolnic.net2026-07-01 → 2026-07-17 · 3 obs
○ 2021-08-31 09:44:52
● 2026-07-01 21:37:06
● 2026-07-17 08:06:48
● 2026-07-01 21:37:06
● 2026-07-17 08:06:48
○NSns2.bodis.com2021-02-28 → 2021-08-31 · 5 obs
○ 2016-12-30 22:00:08
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
●NSns2.cnolnic.net2026-07-01 → 2026-07-17 · 3 obs
○ 2021-08-31 09:44:52
● 2026-07-01 21:37:06
● 2026-07-17 08:06:48
● 2026-07-01 21:37:06
● 2026-07-17 08:06:48
○MXmx76.m2bp.com2021-02-28 → 2021-08-31 · 4 obs
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
○MXmx76.mb1p.com2021-02-28 → 2021-08-31 · 4 obs
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
○A123.254.106.452015-08-17 → 2016-12-30 · 4 obs
● 2015-08-17 07:57:12
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
● 2016-12-30 22:00:08
○ 2021-02-28 11:16:22
○ 2026-07-17 08:06:48
○A199.59.242.1532021-02-28 → 2021-08-31 · 5 obs
○ 2016-12-30 22:00:08
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
● 2021-02-28 11:16:22
● 2021-08-31 09:44:52
○ 2026-07-01 21:37:06
○ 2026-07-17 08:06:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| co | a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co | - |
| 21cn.co | ns1.cnolnic.net, ns2.cnolnic.net | - |
✅ Authoritative Response
Server:106.12.41.177
NS records: ns1.cnolnic.net, ns2.cnolnic.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21cn.co (unsigned zone)
⏱️ Timing
Total: 1039ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.cnolnic.net, ns2.cnolnic.net |
| CNAME | 1 | xh.cs.le.cn |
| SOA | 1 | ns1.cnolnic.net root.cnolnic.net |
Analysis
Name Servers
DNS delegation for 21cn.co points to two name servers: ns1.cnolnic.net and ns2.cnolnic.net.
21cn.co uses the same name servers as several other domains — among them web132-160.bbj.vh.cnolnic.org, jrge.cn, bfgu.cn and two more.
ns1.cnolnic.net and ns2.cnolnic.net each resolve to three IP addresses. ns1.cnolnic.net resolves to 106.13.136.254, 182.61.7.97 and 240c:4082:0:5d80::2. ns2.cnolnic.net resolves to 106.12.41.177, 180.76.132.69 and 240c:4081:8000:1702::3.