`system-instruments.com`

DNSSEC	⚠️ Not signed
A	116.255.246.124^{🇨🇳 CHINA169-Backbone116.255.128.0/17 CNC Group CHINA169 Henan Province Network Addresses from CNNIC(GIANT)}
NS	`ns1.sfn.cn` ⭐
		A	111.63.77.29^{🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route)}
NS	`ns2.sfn.cn`
		A	101.37.119.99^{🇨🇳 Alibaba-Cloud101.37.0.0/17}
		A	111.63.77.30^{🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route)}
MX	`mx650.now.net.cn` ⭐
		A	59.111.193.62^{🇨🇳 NETEASECN59.111.192.0/23}
TXT	`v=spf1include:speedmail.cn -all`
SOA	`ns1.sfn.cn`root@ns1.sfn.cn 2026-03-25 #16

`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=1774431112

Same first word

system-instruments.com

DNS History

9 records (4 active, 5 former)

●NSns1.sfn.cn2016-11-23 → 2026-03-25 · 3 obs

○ 2016-04-28 03:14:24
● 2016-11-23 17:58:38
● 2026-03-25 09:49:44

●NSns2.sfn.cn2016-11-23 → 2026-03-25 · 3 obs

○ 2016-04-28 03:14:24
● 2016-11-23 17:58:38
● 2026-03-25 09:49:44

○NSns57.worldnic.com2015-06-29 → 2016-04-28 · 4 obs

● 2015-06-29 16:01:24
● 2016-04-28 03:14:24
○ 2016-11-23 17:58:38
○ 2026-03-25 09:49:44

○NSns58.worldnic.com2015-06-29 → 2016-04-28 · 4 obs

● 2015-06-29 16:01:24
● 2016-04-28 03:14:24
○ 2016-11-23 17:58:38
○ 2026-03-25 09:49:44

○MXmx605.now.net.cn2017-07-01 → 2017-07-01 · 4 obs

○ 2016-11-23 17:58:38
● 2017-07-01 19:58:48
○ 2026-02-18 18:35:44
○ 2026-03-25 09:49:44

○MXmx620.now.net.cn2015-06-29 → 2016-11-23 · 4 obs

● 2015-06-29 16:01:24
● 2016-11-23 17:58:38
○ 2017-07-01 19:58:48
○ 2026-03-25 09:49:44

●MXmx650.now.net.cn2026-02-18 → 2026-03-25 · 3 obs

○ 2017-07-01 19:58:48
● 2026-02-18 18:35:44
● 2026-03-25 09:49:44

●A116.255.246.1242026-02-18 → 2026-03-25 · 3 obs

○ 2017-07-01 19:58:48
● 2026-02-18 18:35:44
● 2026-03-25 09:49:44

○A119.146.223.1442015-06-29 → 2017-07-01 · 4 obs

● 2015-06-29 16:01:24
● 2017-07-01 19:58:48
○ 2026-02-18 18:35:44
○ 2026-03-25 09:49:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
system-instruments.com	ns1.sfn.cn, ns2.sfn.cn	-

✅ Authoritative Response

Server:101.37.119.99

NS records: ns1.sfn.cn, ns2.sfn.cn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for system-instruments.com (unsigned zone)

⏱️ Timing

Total: 1459ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`116.255.246.124`
NS	2	`ns1.sfn.cn, ns2.sfn.cn`
MX	1	`mx650.now.net.cn (pri: 5)`
TXT	1	`v=spf1include:speedmail.cn -all`
SOA	1	`ns1.sfn.cn root.ns1.sfn.cn`

Analysis

IP Addresses

system-instruments.com points to an IP address: 116.255.246.124.

Other host names, for instance asaki.cn and enmson.com, share IP numbers with system-instruments.com.

Name Servers

Two name servers ns1.sfn.cn and ns2.sfn.cn handle the delegation for system-instruments.com.

system-instruments.com shares the same name server setup as other domains, for instance 84.com.cn, mj.org.cn, nwse.com.cn, bssoft.com.cn and cwta.org.cn.

system-instruments.com shares name servers with other domains at least partially, for example bozhou.cn.

Host names with two IP numbers: ns2.sfn.cn points to 101.37.119.99 and 111.63.77.30.

Host names with one IP number: ns1.sfn.cn points to 111.63.77.29.

Mail Servers

system-instruments.com is handled by a single mail server, mx650.now.net.cn.

system-instruments.com uses the same mail server setup as other domains, for instance ipo-sl.com, zyled.cc, bmyspeaker.com, cecclab.com and bomeirui.com.cn.

system-instruments.com shares at least partially some mail servers with other domains, for instance franktools.com, targuz.com, evaresin.com, ccm-china.com and stafit.com.cn.

these mail servers are commonly used together with mx650hk.now.net.cn.

The host name mx650.now.net.cn points to IP 59.111.193.62.

system-instruments.com - robtex.com