`7daysoffice.com`

DNSSEC	⚠️ Not signed
A	121.41.89.116^{🇨🇳 Alibaba-Cloud121.40.0.0/15}
NS	`dns21.hichina.com` ⭐
		A	2408:4009:501::29^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.40^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.60^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
			PTR	`ip-39-96-153-60.defastlink.net`
		A	47.118.199.200^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
			PTR	`ip-47-118-199-200.defastlink.net`
		A	47.118.199.220^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
			PTR	`ip-47-118-199-220.defastlink.net`
		A	120.76.107.40^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.60^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
			PTR	`ip-120-76-107-60.defastlink.net`
		A	139.224.142.100^{🇨🇳 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,}
			PTR	`ip-139-224-142-100.defastlink.net`
		A	139.224.142.110^{🇨🇳 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,}
			PTR	`ip-139-224-142-110.defastlink.net`
NS	`dns22.hichina.com`
		A	2408:4009:501::30^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.38^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.61^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.198^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.222^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
			PTR	`ip-47-118-199-222.defastlink.net`
		A	120.76.107.38^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.61^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.98^{🇨🇳 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	139.224.142.108^{🇨🇳 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	`mxbiz1.qq.com` ⭐
MX	`mxbiz2.qq.com`⁽¹⁰⁾
TXT	`v=spf1 include:spf.mail.qq.com ~all`
SOA	`dns21.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`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=1776270227

Same first word

7daysoffice.com

DNS History

8 records (5 active, 3 former)

●NSdns21.hichina.com2015-05-09 → 2026-04-15 · 2 obs

● 2015-05-09 00:24:58
● 2026-04-15 16:47:14

●NSdns22.hichina.com2015-05-09 → 2026-04-15 · 2 obs

● 2015-05-09 00:24:58
● 2026-04-15 16:47:14

●MXmxbiz1.qq.com2026-04-07 → 2026-04-15 · 2 obs

● 2026-04-07 18:35:52
● 2026-04-15 16:47:14

●MXmxbiz2.qq.com2026-04-07 → 2026-04-15 · 2 obs

● 2026-04-07 18:35:52
● 2026-04-15 16:47:14

○A114.55.238.2532017-02-19 → 2020-01-19 · 5 obs

○ 2016-06-18 13:36:36
● 2017-02-19 23:19:24
● 2020-01-19 09:47:48
○ 2026-04-07 18:35:52
○ 2026-04-15 16:47:14

○A121.198.156.392015-05-09 → 2015-05-09 · 3 obs

● 2015-05-09 00:24:58
○ 2015-11-14 19:27:42
○ 2026-04-15 16:47:14

●A121.41.89.1162026-04-07 → 2026-04-15 · 3 obs

○ 2020-01-19 09:47:48
● 2026-04-07 18:35:52
● 2026-04-15 16:47:14

○A211.149.236.2262015-11-14 → 2016-06-18 · 5 obs

○ 2015-05-09 00:24:58
● 2015-11-14 19:27:42
● 2016-06-18 13:36:36
○ 2017-02-19 23:19:24
○ 2026-04-15 16:47:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
7daysoffice.com	dns21.hichina.com, dns22.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.40

NS records: dns21.hichina.com, dns22.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 7daysoffice.com (unsigned zone)

⏱️ Timing

Total: 538ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.41.89.116`
NS	2	`dns22.hichina.com, dns21.hichina.com`
MX	2	`mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10)`
TXT	1	`v=spf1 include:spf.mail.qq.com ~all`
SOA	1	`dns21.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns21.hichina.com, dns21.hichina.com, dns21.hichina.com...)

Analysis

IP Addresses

7daysoffice.com points to a single IP number: 121.41.89.116.

Name Servers

Delegation for 7daysoffice.com rests with two name servers, dns21.hichina.com and dns22.hichina.com.

7daysoffice.com shares the same name server setup as other domains, including jxstlsdyf.com, gtmmc.com, fdny.cn, mta.cn and cnrdm.com.

7daysoffice.com partially shares name servers with other domains; for instance opxz.cn, jobpulse.xyz and mycenter.cn.

These name servers are commonly used with expirens3.hichina.com and expirens4.hichina.com.

Host names with nine IP numbers:

dns21.hichina.com points to: 2408:4009:501::29, 39.96.153.40, 39.96.153.60, 47.118.199.200, 47.118.199.220, 120.76.107.40, 120.76.107.60, 139.224.142.100 and 139.224.142.110.

dns22.hichina.com points to: 2408:4009:501::30, 39.96.153.38, 39.96.153.61, 47.118.199.198, 47.118.199.222, 120.76.107.38, 120.76.107.61, 139.224.142.98 and 139.224.142.108.

Mail Servers

7daysoffice.com is handled by two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.

7daysoffice.com uses the same mail server configuration as other domains, such as pybh.org, dyyseo.com, chuanxi.com.cn, lizhan.com.cn and ioin.in.

7daysoffice.com shares mail servers with other domains at least in part, for instance farseasty.com, dnsv4.com, gzfyit.com, wtlog.com and asimom.com.

7daysoffice.com - robtex.com

7daysoffice.com

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