`sysdy.cn`

DNSSEC	⚠️ Not signed
NS	`ns1.nowcndns.com` ⭐
		A	1.193.216.204^{🇨🇳 CHINANET-Henan-Luoyang-IDC1.193.216.0/24 Chinatelecom HeNan Province Network}
			PTR	`ip-1-193-216-204.defastlink.net`
		A	218.98.111.129^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
			PTR	`ip-218-98-111-129.defastlink.net`
		A	218.98.111.138^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
			PTR	`ip-218-98-111-138.defastlink.net`
NS	`ns2.nowcndns.com`
		A	61.158.128.11^{🇨🇳 CHINA169-Backbone61.158.128.0/17 CNC Group CHINA169 Henan Province Network}
			PTR	`11.128.158.61.ha.cnc`
		A	183.253.57.202^{🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route)}
			PTR	`ip-183-253-57-202.defastlink.net`
		A	211.99.99.38^{🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object}
			PTR	`ip-211-99-99-38.defastlink.net`
SOA	`ns1.nowcndns.com`admin@nowcndns.com serial=1765381593

`cn`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.cn` ⭐ 🔒
	NS	`b.dns.cn`
	NS	`c.dns.cn` 🔒
	NS	`d.dns.cn` 🔒
	NS	`e.dns.cn` 🔒
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2034456417

Same first word

sysdy.cn

Similar names

ydsys.com

sdysy.com

ydsys.cn

ysyds.com

dysys.cn

sydys.com

dysys.cz

ysdsy.com

dysys.us

DNS History

4 records (2 active, 2 former)

○NSns1.chinanetsun.com2015-05-07 → 2017-02-09 · 4 obs

● 2015-05-07 23:17:42
● 2017-02-09 16:23:48
○ 2026-03-12 01:45:58
○ 2026-03-12 20:17:26

●NSns1.nowcndns.com2026-03-12 → 2026-03-12 · 3 obs

○ 2017-02-09 16:23:48
● 2026-03-12 01:45:58
● 2026-03-12 20:17:26

○NSns2.chinanetsun.com2015-10-20 → 2017-02-09 · 5 obs

○ 2015-05-07 23:17:42
● 2015-10-20 17:37:52
● 2017-02-09 16:23:48
○ 2026-03-12 01:45:58
○ 2026-03-12 20:17:26

●NSns2.nowcndns.com2026-03-12 → 2026-03-12 · 3 obs

○ 2017-02-09 16:23:48
● 2026-03-12 01:45:58
● 2026-03-12 20:17:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
sysdy.cn	ns1.nowcndns.com, ns2.nowcndns.com	-

✅ Authoritative Response

Server: 218.98.111.129

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sysdy.cn (unsigned zone)

⏱️ Timing

Total: 1968ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.nowcndns.com, ns2.nowcndns.com`
SOA	1	`ns1.nowcndns.com admin.nowcndns.com`

Analysis

Name Servers

sysdy.cn is delegated to two name servers: ns1.nowcndns.com and ns2.nowcndns.com.

sysdy.cn shares the same name server setup as you321.cn, myhenan.cn, dioniso.com.cn, groheshop.cn and 01nd.cn.

Host names with three IP numbers: ns1.nowcndns.com points to 1.193.216.204, 218.98.111.129 and 218.98.111.138; ns2.nowcndns.com points to 61.158.128.11, 183.253.57.202 and 211.99.99.38.

sysdy.cn - robtex.com

sysdy.cn

cn