`rtopt.com`

DNSSEC	⚠️ Not signed
A	8.220.197.193^{🇰🇷 Alibaba-Cloud8.220.192.0/19 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
NS	`dns3.hichina.com` ⭐
		A	2408:4009:501::11^{🇨🇳 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	`dns4.hichina.com`
		A	2408:4009:501::12^{🇨🇳 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	`v=spf1 +include:_netblocks.m.feishu.cn -all`
TXT	`verification-code-site-App_feishu=mnzmw3n3j0QZ5r40aWR9`
SOA	`dns3.hichina.com`hostmaster@hichina.com 2026-05-28 #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=1785585437

Same first word

rtopt.com

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DNS History

15 records (6 active, 9 former)

●NSdns3.hichina.com2026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

●NSdns4.hichina.com2026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

○NSns438.pair.com2008-03-14 → 2017-04-05 · 4 obs

● 2008-03-14 21:15:56
● 2017-04-05 19:23:28
○ 2020-03-10 03:29:28
○ 2026-08-01 12:00:14

○NSns5.ns0.com2008-03-14 → 2017-04-05 · 4 obs

● 2008-03-14 21:15:56
● 2017-04-05 19:23:28
○ 2020-03-10 03:29:28
○ 2026-08-01 12:00:14

○NSvipd811.earth.orderbox-dns.com2020-03-10 → 2020-03-10 · 4 obs

○ 2017-04-05 19:23:28
● 2020-03-10 03:29:28
○ 2026-05-22 15:31:10
○ 2026-08-01 12:00:14

○NSvipd811.mars.orderbox-dns.com2020-03-10 → 2020-03-10 · 4 obs

○ 2017-04-05 19:23:28
● 2020-03-10 03:29:28
○ 2026-05-22 15:31:10
○ 2026-08-01 12:00:14

○NSvipd811.mercury.orderbox-dns.com2020-03-10 → 2020-03-10 · 4 obs

○ 2017-04-05 19:23:28
● 2020-03-10 03:29:28
○ 2026-05-22 15:31:10
○ 2026-08-01 12:00:14

○NSvipd811.venus.orderbox-dns.com2020-03-10 → 2020-03-10 · 4 obs

○ 2017-04-05 19:23:28
● 2020-03-10 03:29:28
○ 2026-05-22 15:31:10
○ 2026-08-01 12:00:14

○MXmailwash40.pair.com2008-03-14 → 2017-04-05 · 4 obs

● 2008-03-14 21:15:56
● 2017-04-05 19:23:28
○ 2020-03-10 03:29:28
○ 2026-08-01 12:00:14

●MXmx1.feishu.cn2026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

●MXmx2.feishu.cn2026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

●MXmx3.feishu.cn2026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

○A104.252.161.62020-03-10 → 2020-03-10 · 4 obs

○ 2017-04-05 19:23:28
● 2020-03-10 03:29:28
○ 2026-05-22 15:31:10
○ 2026-08-01 12:00:14

○A66.39.133.922008-03-14 → 2017-04-05 · 4 obs

● 2008-03-14 21:15:56
● 2017-04-05 19:23:28
○ 2020-03-10 03:29:28
○ 2026-08-01 12:00:14

●A8.220.197.1932026-05-22 → 2026-08-01 · 3 obs

○ 2020-03-10 03:29:28
● 2026-05-22 15:31:10
● 2026-08-01 12:00:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
rtopt.com	dns3.hichina.com, dns4.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.44

NS records: dns3.hichina.com, dns4.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtopt.com (unsigned zone)

⏱️ Timing

Total: 619ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`8.220.197.193`
NS	2	`dns3.hichina.com, dns4.hichina.com`
MX	3	`mx2.feishu.cn (pri: 5), mx3.feishu.cn (pri: 10)...`
TXT	2	`v=spf1 +include:_netblocks.m.feishu.cn -, verification-code-site-App_feishu=mnzmw3`
SOA	1	`dns3.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns3.hichina.com, dns3.hichina.com, dns3.hichina.com...)

Analysis

IP Addresses

rtopt.com points to a single IP number: 8.220.197.193.

Name Servers

rtopt.com uses two name servers for its delegation: dns3.hichina.com and dns4.hichina.com.

rtopt.com shares its name server setup with other domains, including co-qn.cn, yql88.com, bazshd.com and two others.

Some of rtopt.com's name servers are also used by other domains, including yeowan.com, diyhub.net, inteladorn.com and 688.cn.

These name servers are regularly seen alongside expirens3.hichina.com and expirens4.hichina.com as name servers.

Host names with 9 IP numbers:

Hostname dns3.hichina.com directs to 39.96.153.43, 39.96.153.63 and 47.118.199.203 along with 6 other IP addresses.

Hostname dns4.hichina.com directs to 39.96.153.44, 39.96.153.54 and 47.118.199.204 along with 6 other IP addresses.

Mail Servers

rtopt.com uses three mail servers — mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

rtopt.com shares mail servers — at least in part — with other domains, including inbit.cn, ppmtdate.com, dataarctech.com and two others.

These mail servers are frequently seen alongside the mail servers mxbiz1.qq.com.

Host names with three IP numbers:

The hostname mx3.feishu.cn directs to 52.220.106.220, 101.126.58.225 and 122.14.229.0.

Host names with two IP numbers:

mx2.feishu.cn directs traffic to 101.126.58.225 and 122.14.229.0.

Host names pointing to a single IP address:

mx1.feishu.cn has the IP address 52.220.106.220.

Both mx3.feishu.cn and mx1.feishu.cn resolve to 52.220.106.220 IP addresses each.

Both mx3.feishu.cn and mx2.feishu.cn resolve to 101.126.58.225 IP addresses each.

Both mx3.feishu.cn and mx2.feishu.cn resolve to 122.14.229.0 IP addresses each.

rtopt.com - robtex.com

rtopt.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`rtopt.com`

`com`