`bjstudy.cn`

DNSSEC	⚠️ Not signed
A	38.177.173.221^{🇺🇸 AS39847838.177.128.0/18 PEG TECH INC PT-82}
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.com`admin@nowcndns.com serial=1773478149

`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.cn`root@cnnic.cn serial=2034590749

Same first word

bjstudy.com.cn

bjstudy.cn

Similar names

jbstudy.kr

justbyd.com

DNS History

12 records (3 active, 9 former)

●NSns1.nowcndns.com2026-02-24 → 2026-03-26 · 3 obs

○ 2017-06-20 09:19:02
● 2026-02-24 04:51:20
● 2026-03-26 22:07:16

●NSns2.nowcndns.com2026-02-24 → 2026-03-26 · 3 obs

○ 2017-06-20 09:19:02
● 2026-02-24 04:51:20
● 2026-03-26 22:07:16

○NSwww.bjstudy.cn2015-08-16 → 2017-06-20 · 4 obs

● 2015-08-16 17:38:04
● 2017-06-20 09:19:02
○ 2026-02-24 04:51:20
○ 2026-03-26 22:07:16

○MXio.bouncemx.com2015-11-29 → 2016-12-01 · 4 obs

● 2015-11-29 12:02:50
● 2016-12-01 20:21:26
○ 2017-06-20 09:19:02
○ 2026-03-26 22:07:16

○A38.173.27.2102026-02-24 → 2026-02-24 · 4 obs

○ 2017-06-20 09:19:02
● 2026-02-24 04:51:20
○ 2026-03-26 22:07:14
○ 2026-03-26 22:07:16

●A38.177.173.2212026-03-26 → 2026-03-26 · 3 obs

○ 2026-02-24 04:51:20
● 2026-03-26 22:07:14
● 2026-03-26 22:07:16

○A70.39.84.2302015-08-16 → 2016-03-29 · 4 obs

● 2015-08-16 17:38:04
● 2016-03-29 15:46:54
○ 2016-09-10 22:54:06
○ 2026-03-26 22:07:16

○A70.39.84.2312016-11-26 → 2016-11-26 · 4 obs

○ 2016-09-10 22:54:06
● 2016-11-26 07:37:40
○ 2016-12-01 20:21:26
○ 2026-03-26 22:07:16

○A70.39.84.2342015-11-29 → 2015-11-29 · 4 obs

○ 2015-08-16 17:38:04
● 2015-11-29 12:02:50
○ 2015-12-22 17:49:44
○ 2026-03-26 22:07:16

○A70.39.84.2352015-12-22 → 2015-12-22 · 4 obs

○ 2015-11-29 12:02:50
● 2015-12-22 17:49:44
○ 2016-03-29 15:46:54
○ 2026-03-26 22:07:16

○A70.39.84.2412016-09-10 → 2016-12-01 · 6 obs

○ 2016-03-29 15:46:54
● 2016-09-10 22:54:06
○ 2016-11-26 07:37:40
● 2016-12-01 20:21:26
○ 2017-06-20 09:19:02
○ 2026-03-26 22:07:16

○CNAMEb.dcoin.co2015-08-16 → 2017-06-20 · 4 obs

● 2015-08-16 17:38:04
● 2017-06-20 09:19:02
○ 2026-02-24 04:51:20
○ 2026-03-26 22:07:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
bjstudy.cn	ns1.nowcndns.com, ns2.nowcndns.com	-

✅ Authoritative Response

Server:61.158.128.11

NS records: ns1.nowcndns.com, ns2.nowcndns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bjstudy.cn (unsigned zone)

⏱️ Timing

Total: 1805ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`38.177.173.221`
NS	2	`ns1.nowcndns.com, ns2.nowcndns.com`
SOA	1	`ns1.nowcndns.com admin.nowcndns.com`

Analysis

IP Addresses

bjstudy.cn points to IP number 38.177.173.221.

For instance, other host names greenok.cn, alicosts.cn, eu136.cn, pc34.cn and cyzsks.cn share IP numbers with bjstudy.cn.

Name Servers

bjstudy.cn is delegated to two name servers: ns1.nowcndns.com and ns2.nowcndns.com.

bjstudy.cn uses the same name server setup as other domains such as lckmhg.cn, dnapd.cn, id355.cn, eeln.cn and zyjyw.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.

bjstudy.cn - robtex.com

bjstudy.cn

cn