`sdysedu.com`

DNSSEC	⚠️ Not signed
A	154.220.239.243^{🇭🇰 GNET-AS9294154.220.224.0/20}
NS	`ns1.julydns.com` ⭐
		A	162.159.48.223^{Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.julydns.com`
		A	162.159.48.223^{Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`ns1.julydns.com`master@jmdns.com serial=1785055833

`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=1785773007

Subdomains

www.sdysedu.com

m.sdysedu.com

Same first word

sdysedu.com

Similar names

sdsyedu.cn

DNS History

9 records (3 active, 6 former)

●NSns1.julydns.com2026-07-12 → 2026-08-03 · 3 obs

○ 2017-06-29 10:10:36
● 2026-07-12 10:36:30
● 2026-08-03 16:07:14

○NSns11.xincache.com2016-12-14 → 2016-12-14 · 3 obs

● 2016-12-14 21:45:04
○ 2017-06-29 10:10:36
○ 2026-08-03 16:07:14

○NSns12.xincache.com2016-12-14 → 2016-12-14 · 3 obs

● 2016-12-14 21:45:04
○ 2017-06-29 10:10:36
○ 2026-08-03 16:07:14

○NSns15.xincache.com2017-06-29 → 2017-06-29 · 4 obs

○ 2016-12-14 21:45:04
● 2017-06-29 10:10:36
○ 2026-07-12 10:36:30
○ 2026-08-03 16:07:14

○NSns16.xincache.com2017-06-29 → 2017-06-29 · 4 obs

○ 2016-12-14 21:45:04
● 2017-06-29 10:10:36
○ 2026-07-12 10:36:30
○ 2026-08-03 16:07:14

●NSns2.julydns.com2026-07-12 → 2026-08-03 · 3 obs

○ 2017-06-29 10:10:36
● 2026-07-12 10:36:30
● 2026-08-03 16:07:14

●A154.220.239.2432026-08-03 → 2026-08-03 · 2 obs

○ 2026-07-19 15:26:34
● 2026-08-03 16:07:14

○A19.200.25.32026-07-12 → 2026-07-12 · 3 obs

● 2026-07-12 10:36:30
○ 2026-07-19 15:26:34
○ 2026-08-03 16:07:14

○A87.85.109.1702026-07-19 → 2026-07-19 · 3 obs

○ 2026-07-12 10:36:30
● 2026-07-19 15:26:34
○ 2026-08-03 16:07:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, h.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net...	-
sdysedu.com	ns1.julydns.com, ns2.julydns.com	2 records

✅ Authoritative Response

Server:162.159.48.223

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sdysedu.com (unsigned zone)

⏱️ Timing

Total: 277ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.220.239.243`
NS	2	`ns1.julydns.com, ns2.julydns.com`
SOA	1	`ns1.julydns.com master.jmdns.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.julydns.com, ns2.julydns.com)

Analysis

Hierarchy

The parent domain of www.sdysedu.com and m.sdysedu.com is sdysedu.com.

IP Addresses

sdysedu.com directs to one IP number, which is 154.220.239.243.

Among the host names that share IP numbers with sdysedu.com are www.dezhoutv.com, m.cyicyi.com, www.cyicyi.com and two others.

Name Servers

sdysedu.com uses two name servers for its delegation: ns1.julydns.com and ns2.julydns.com.

sdysedu.com has the same name server delegation as a number of other domains, such as shtdjk.com, youfanghome.com, tielinga.com and two more.

sdysedu.com has at least partial name server overlap with other domains, such as 75939.cn, yinghuacn.cn, ajqhbj.com and two others.

It is common to find these name servers paired with the name servers ns1.judns.com, ns2.judns.com, ns1.onclouddns.com and ns2.onclouddns.com.

ns1.julydns.com resolves to 162.159.48.223; ns2.julydns.com resolves to the same IP address, 162.159.48.223.

Both ns1.julydns.com and ns2.julydns.com resolve to 162.159.48.223 IP addresses each.

sdysedu.com - robtex.com

sdysedu.com

com