`91sys.com`

DNSSEC	⚠️ Not signed
A	154.213.36.209^{🇭🇰 POWERLINE-HK154.213.32.0/19 Digital Core Technology Co., Ltd}
NS	`a10.share-dns.com` ⭐ ⚠️ Not in parent delegation
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`a.share-dns.com` ⚠️ Not in zone NS records
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b.share-dns.net` ⚠️ Not in zone NS records
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b10.share-dns.net` ⚠️ Not in parent delegation
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`a.share-dns.com`master@share-dns.com serial=1772782992

`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=1778791676

Subdomains

www.91sys.com

Same first word

91sys.com

Similar names

91yss.com

DNS History

12 records (5 active, 7 former)

●NSa.share-dns.com2026-03-21 → 2026-05-14 · 3 obs

○ 2017-06-23 19:36:46
● 2026-03-21 09:11:58
● 2026-05-14 21:13:14

●NSa10.share-dns.com2026-03-21 → 2026-05-14 · 3 obs

○ 2017-06-23 19:36:46
● 2026-03-21 09:11:58
● 2026-05-14 21:13:14

●NSb.share-dns.net2026-03-21 → 2026-05-14 · 3 obs

○ 2017-06-23 19:36:46
● 2026-03-21 09:11:58
● 2026-05-14 21:13:14

●NSb10.share-dns.net2026-03-21 → 2026-05-14 · 3 obs

○ 2017-06-23 19:36:46
● 2026-03-21 09:11:58
● 2026-05-14 21:13:14

○NSdns1.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

○NSdns2.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

○NSdns3.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

○NSdns4.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

○NSdns5.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

○NSdns6.iidns.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:35:00
● 2016-04-17 07:30:50
○ 2017-06-23 19:36:46
○ 2026-05-14 21:13:14

●A154.213.36.2092026-03-21 → 2026-05-14 · 2 obs

● 2026-03-21 09:11:58
● 2026-05-14 21:13:14

○A160.124.246.892026-03-21 → 2026-05-14 · 2 obs

○ 2026-03-21 09:11:58
○ 2026-05-14 21:13:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, b.gtld-servers.net, i.gtld-servers.net, a.gtld-servers.net...	-
91sys.com	b10.share-dns.net, a10.share-dns.com	1 record

✅ Authoritative Response

Server:172.64.52.239

NS records: b10.share-dns.net, a10.share-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 91sys.com (unsigned zone)

⏱️ Timing

Total: 232ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.213.36.209`
NS	2	`a.share-dns.com, b.share-dns.net`
SOA	1	`a.share-dns.com master.share-dns.com`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (a10.share-dns.com)

Analysis

Hierarchy

The parent of www.91sys.com is 91sys.com.

IP Addresses

91sys.com points to a single IP number: 154.213.36.209.

Name Servers

91sys.com is delegated to four name servers: a10.share-dns.com, a.share-dns.com, b10.share-dns.net and b.share-dns.net.

91sys.com shares name servers with other domains at least partially, for instance dg-fn.com, tyhsyj.com, 78080.xyz, jsswjb.com and gyrxb.com.