irtb.cn - robtex.com
irtb.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 177.211.7.121🇧🇷 UNSPECIFIED160.0.0.0/3 | ||||||
| NS | ns1.nowcndns.com ⭐ | ||||||
| A | 1.193.216.204🇨🇳 CHINANET-Henan-Luoyang-IDC1.193.216.0/24 Chinatelecom HeNan Province Network | ||||||
| A | 218.98.111.129🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| A | 218.98.111.138🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| NS | ns2.nowcndns.com | ||||||
| A | 61.158.128.11🇨🇳 CHINA169-Backbone61.158.128.0/17 CNC Group CHINA169 Henan Province Network | ||||||
| PTR | 11.128.158.61.ha.cnc | ||||||
| A | 183.253.57.202🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route) | ||||||
| A | 211.99.99.38🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object | ||||||
| SOA | ns1.nowcndns.comadmin@nowcndns.com serial=1774691565 | ||||||
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=2034659955 | ||||||
Same first word
Similar names
DNS History
11 records (3 active, 8 former)
○NSf1g1ns1.dnspod.net2015-12-05 → 2016-06-29 · 4 obs
● 2015-12-05 19:27:28
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
○NSf1g1ns2.dnspod.net2015-12-05 → 2016-06-29 · 4 obs
● 2015-12-05 19:27:28
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
○NSns1.dnsfang.com2017-03-18 → 2020-01-08 · 5 obs
○ 2016-06-29 06:39:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
●NSns1.nowcndns.com2026-03-30 → 2026-04-11 · 3 obs
○ 2020-01-08 17:17:46
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
○NSns2.dnsfang.com2017-03-18 → 2020-01-08 · 5 obs
○ 2016-06-29 06:39:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
●NSns2.nowcndns.com2026-03-30 → 2026-04-11 · 3 obs
○ 2020-01-08 17:17:46
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
○A104.203.68.162016-06-29 → 2016-06-29 · 4 obs
○ 2016-04-18 12:11:52
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
● 2016-06-29 06:39:54
○ 2017-03-18 04:47:54
○ 2026-04-11 19:33:54
○A172.240.93.352015-12-05 → 2016-01-07 · 4 obs
● 2015-12-05 19:27:28
● 2016-01-07 12:47:00
○ 2016-04-08 10:24:26
○ 2026-04-11 19:33:54
● 2016-01-07 12:47:00
○ 2016-04-08 10:24:26
○ 2026-04-11 19:33:54
●A177.211.7.1212026-03-30 → 2026-04-11 · 3 obs
○ 2020-01-08 17:17:46
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
● 2026-03-30 22:16:42
● 2026-04-11 19:33:54
○A23.224.244.1732017-03-18 → 2020-01-08 · 5 obs
○ 2016-06-29 06:39:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
● 2017-03-18 04:47:54
● 2020-01-08 17:17:46
○ 2026-03-30 22:16:42
○ 2026-04-11 19:33:54
○A69.197.188.1322016-04-08 → 2016-04-18 · 5 obs
○ 2016-01-07 12:47:00
● 2016-04-08 10:24:26
● 2016-04-18 12:11:52
○ 2016-06-29 06:39:54
○ 2026-04-11 19:33:54
● 2016-04-08 10:24:26
● 2016-04-18 12:11:52
○ 2016-06-29 06:39:54
○ 2026-04-11 19:33:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, c.dns.cn, b.dns.cn, d.dns.cn... | - |
| irtb.cn | ns1.nowcndns.com, ns2.nowcndns.com | - |
✅ Authoritative Response
Server:211.99.99.38
NS records: ns1.nowcndns.com, ns2.nowcndns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for irtb.cn (unsigned zone)
⏱️ Timing
Total: 1765ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 177.211.7.121 |
| NS | 2 | ns1.nowcndns.com, ns2.nowcndns.com |
| SOA | 1 | ns1.nowcndns.com admin.nowcndns.com |
Analysis
IP Addresses
irtb.cn resolves to a single IP: 177.211.7.121.
Other host names including san45.cn, breastbone.cn and hjeo.cn share IP numbers with irtb.cn.
Name Servers
irtb.cn has two name servers: ns1.nowcndns.com and ns2.nowcndns.com.
irtb.cn shares the same name server setup as other domains, for example sihaiyaoye.cn, itbb580.com.cn, jmht.com.cn, bogiz.cn and piannuan.cn.
Host names with three IP numbers: ns1.nowcndns.com points to 1.193.216.204, 218.98.111.129 and 218.98.111.138; ns2.nowcndns.com points to 61.158.128.11, 183.253.57.202 and 211.99.99.38.