`gcb001.com`

DNSSEC	⚠️ Not signed
A	156.250.77.211^{🇿🇦 HKIDC-AS-AP156.250.64.0/18 Shenzhen Jizhan Technology Co., Ltd.}
NS	`ns1.julydns.com` ⭐ ⚠️ Not in parent delegation
		A	47.97.51.45^{🇨🇳 Alibaba-Cloud47.96.0.0/15 Aliyun Computing Co., LTD}
			PTR	`ip-47-97-51-45.defastlink.net`
NS	`ns1.judns.com` ⚠️ Not in zone NS records
		A	47.97.51.45^{🇨🇳 Alibaba-Cloud47.96.0.0/15 Aliyun Computing Co., LTD}
			PTR	`ip-47-97-51-45.defastlink.net`
NS	`ns2.judns.com` ⚠️ Not in zone NS records
		A	162.159.27.251^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-162-159-27-251.defastlink.net`
NS	`ns2.julydns.com` ⚠️ Not in parent delegation
		A	162.159.48.223^{Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-162-159-48-223.defastlink.net`
SOA	`ns1.julydns.com`master@jmdns.com serial=1769696808

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Same first word

gcb001.com

DNS History

12 records (5 active, 7 former)

○NSjuming.dnsdun.com2016-07-11 → 2016-07-20 · 5 obs

○ 2015-08-05 08:44:54
● 2016-07-11 02:55:48
● 2016-07-20 01:06:10
○ 2020-01-19 13:30:52
○ 2026-03-23 05:35:34

○NSjuming.dnsdun.net2016-07-11 → 2016-07-20 · 5 obs

○ 2015-08-05 08:44:54
● 2016-07-11 02:55:48
● 2016-07-20 01:06:10
○ 2020-01-19 13:30:52
○ 2026-03-23 05:35:34

○NSns1.51dns.com2015-08-05 → 2015-08-05 · 3 obs

● 2015-08-05 08:44:54
○ 2016-07-11 02:55:48
○ 2026-03-23 05:35:34

●NSns1.judns.com2026-03-13 → 2026-03-23 · 3 obs

○ 2020-01-19 13:30:52
● 2026-03-13 03:29:40
● 2026-03-23 05:35:34

●NSns1.julydns.com2026-03-13 → 2026-03-23 · 3 obs

○ 2020-01-19 13:30:52
● 2026-03-13 03:29:40
● 2026-03-23 05:35:34

●NSns2.judns.com2026-03-13 → 2026-03-23 · 3 obs

○ 2020-01-19 13:30:52
● 2026-03-13 03:29:40
● 2026-03-23 05:35:34

●NSns2.julydns.com2026-03-13 → 2026-03-23 · 3 obs

○ 2020-01-19 13:30:52
● 2026-03-13 03:29:40
● 2026-03-23 05:35:34

○NSns4.dnsdun.com2020-01-19 → 2020-01-19 · 4 obs

○ 2016-07-20 01:06:10
● 2020-01-19 13:30:52
○ 2026-03-13 03:29:40
○ 2026-03-23 05:35:34

○NSns4.dnsdun.net2020-01-19 → 2020-01-19 · 4 obs

○ 2016-07-20 01:06:10
● 2020-01-19 13:30:52
○ 2026-03-13 03:29:40
○ 2026-03-23 05:35:34

○A107.148.8.1112016-07-20 → 2016-07-20 · 4 obs

○ 2015-08-05 08:44:54
● 2016-07-20 01:06:10
○ 2020-01-19 13:30:52
○ 2026-03-23 05:35:34

●A156.250.77.2112026-03-13 → 2026-03-23 · 3 obs

○ 2020-01-19 13:30:52
● 2026-03-13 03:29:40
● 2026-03-23 05:35:34

○A216.172.131.842015-08-05 → 2015-08-05 · 3 obs

● 2015-08-05 08:44:54
○ 2026-03-13 03:29:40
○ 2026-03-23 05:35:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
gcb001.com	ns1.judns.com, ns2.judns.com	2 records

✅ Authoritative Response

Server:162.159.27.251

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gcb001.com (unsigned zone)

⏱️ Timing

Total: 345ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`156.250.77.211`
NS	2	`ns1.julydns.com, ns2.julydns.com`
SOA	1	`ns1.julydns.com master.jmdns.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.judns.com, ns2.judns.com)

Analysis

IP Addresses

gcb001.com points to a single IP number: 156.250.77.211.

Other host names such as mobile.sdyhw.cn, try.sdyhw.cn and sdyhw.cn share IP numbers with gcb001.com.

Name Servers

gcb001.com is delegated to four name servers: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.

gcb001.com at least partially shares name servers with other domains, for instance crosswith.com, llm168.com, fjayt.com, yaomaima.com and codegiri.com.