`dockernb.com`

DNSSEC	⚠️ Not signed
A	103.218.240.200^{🇭🇰 UCLOUD-1103.218.240.0/24 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED FLAT/RM 603 6/F LAWS COMMERCIAL PLAZA 788 CHEUNG SHA WAN ROAD, KL,}
NS	`dns1.hichina.com` ⭐
		A	2408:4009:501::9^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.43^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.63^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.203^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.213^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.43^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.63^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.113^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.123^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns2.hichina.com`
		A	2408:4009:501::10^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.44^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.54^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.204^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.214^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.44^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.54^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.114^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.124^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
MX	`mx1.feishu.cn` ⭐
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.feishu.cn`⁽⁵⁾
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
MX	`mx3.feishu.cn`⁽¹⁰⁾
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`verification-code-site-App_feishu=a9rHyYgZtnjxZMmn6ddZ`
TXT	`v=spf1 +include:_netblocks.m.feishu.cn -all`
SOA	`dns1.hichina.com`hostmaster@hichina.com 2026-01-09 #13

`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=1774391212

Same first word

dockernb.com

Similar names

nordbeck.info

nordbeck.net

brockend.com

brockden.com

nordbeck.nl

dornbeck.de

DNS History

7 records (6 active, 1 former)

●NSdns1.hichina.com2019-12-17 → 2026-03-24 · 2 obs

● 2019-12-17 14:36:24
● 2026-03-24 22:30:04

●NSdns2.hichina.com2019-12-17 → 2026-03-24 · 2 obs

● 2019-12-17 14:36:24
● 2026-03-24 22:30:04

●MXmx1.feishu.cn2026-03-24 → 2026-03-24 · 1 obs

● 2026-03-24 22:30:04

●MXmx2.feishu.cn2026-03-24 → 2026-03-24 · 1 obs

● 2026-03-24 22:30:04

●MXmx3.feishu.cn2026-03-24 → 2026-03-24 · 1 obs

● 2026-03-24 22:30:04

●A103.218.240.2002026-03-24 → 2026-03-24 · 2 obs

○ 2019-12-17 14:36:24
● 2026-03-24 22:30:04

○A173.82.173.332019-12-17 → 2019-12-17 · 2 obs

● 2019-12-17 14:36:24
○ 2026-03-24 22:30:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
dockernb.com	dns2.hichina.com, dns1.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.44

NS records: dns2.hichina.com, dns1.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dockernb.com (unsigned zone)

⏱️ Timing

Total: 510ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.218.240.200`
NS	2	`dns2.hichina.com, dns1.hichina.com`
MX	3	`mx3.feishu.cn (pri: 10), mx2.feishu.cn (pri: 5)...`
TXT	2	`verification-code-site-App_feishu=a9rHyY, v=spf1 +include:_netblocks.m.feishu.cn -`
SOA	1	`dns1.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns2.hichina.com, dns2.hichina.com, dns2.hichina.com...)

Analysis

IP Addresses

dockernb.com points to an IP address: 103.218.240.200.

Name Servers

Two name servers dns1.hichina.com and dns2.hichina.com handle the delegation for dockernb.com.

dockernb.com shares the same name server setup as other domains, for instance ii45.com, toppower.com, dogbw.com, mypettoy.com and qianjiearts.com.

dockernb.com at least partially shares name servers with other domains, for instance net-safe.com.cn, gwjlb.com, magicwand.cn, bucaikuwang.com and hruai.com.

These name servers are commonly used with ns1.alidns.com and ns2.alidns.com.

Host names with nine IP numbers:

dns1.hichina.com points to: 2408:4009:501::9, 39.96.153.43, 39.96.153.63, 47.118.199.203, 47.118.199.213, 120.76.107.43, 120.76.107.63, 139.224.142.113 and 139.224.142.123.

dns2.hichina.com points to: 2408:4009:501::10, 39.96.153.44, 39.96.153.54, 47.118.199.204, 47.118.199.214, 120.76.107.44, 120.76.107.54, 139.224.142.114 and 139.224.142.124.

Mail Servers

Three mail servers handle dockernb.com: mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

dockernb.com shares at least partially some mail servers with other domains, for instance rtbmax.com, teamone.cn, decimalpoint.com.cn, ivytechate.com and tokit.com.