`yiyioptical.com`

DNSSEC	⚠️ Not signed
NS	`ns1.udomain.com` ⭐
		A	45.121.194.9^{🇭🇰 UDOMAIN-AS-AP45.121.194.0/24 UDomain Web Hosting Company Limited Unit A-D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon.}
NS	`ns2.udomain.com`
		A	45.121.198.9^{🇭🇰 UDOMAIN-AS-AP45.121.198.0/24 Web Host Ltd Unit A-D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon.}
MX	`mail.yiyioptical.com` ⭐
		A	116.92.187.98^{🇭🇰 WTT116.92.184.0/21 Wharf T&T}
			PTR	`solamor.biz`
			PTR	`garboptical.cn`
			PTR	`garboptical.com`
			PTR	`intertrade-garbo.com`
			PTR	`lucentecastello.com`
			PTR	`yiyimanufactory.com`
			PTR	`yiyioptical.com`
SOA	`ns1.udomain.com`ns2@udomain.com 2019-12-10 #14

`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=1777038551

PTR for

98.187.92.116.in-addr.arpa

Subdomains

mail.yiyioptical.com

Same first word

yiyioptical.com

DNS History

5 records (3 active, 2 former)

●NSns1.udomain.com2026-02-23 → 2026-04-24 · 3 obs

○ 2017-09-30 22:24:10
● 2026-02-23 02:51:14
● 2026-04-24 13:55:50

○NSns1.udomain.net2016-12-19 → 2017-09-30 · 4 obs

● 2016-12-19 06:28:00
● 2017-09-30 22:24:10
○ 2026-02-23 02:51:14
○ 2026-04-24 13:55:50

●NSns2.udomain.com2026-02-23 → 2026-04-24 · 3 obs

○ 2017-09-30 22:24:10
● 2026-02-23 02:51:14
● 2026-04-24 13:55:50

○NSns2.udomain.net2016-12-19 → 2017-09-30 · 4 obs

● 2016-12-19 06:28:00
● 2017-09-30 22:24:10
○ 2026-02-23 02:51:14
○ 2026-04-24 13:55:50

●MXmail.yiyioptical.com2016-12-19 → 2026-04-24 · 2 obs

● 2016-12-19 06:28:00
● 2026-04-24 13:55:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, k.gtld-servers.net, h.gtld-servers.net, m.gtld-servers.net...	-
yiyioptical.com	ns1.udomain.com, ns2.udomain.com	2 records

✅ Authoritative Response

Server:45.121.198.9

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for yiyioptical.com (unsigned zone)

⏱️ Timing

Total: 514ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns2.udomain.com, ns1.udomain.com`
MX	1	`mail.yiyioptical.com (pri: 100)`
SOA	1	`ns1.udomain.com ns2.udomain.com`

📌 Glue Records Collected

Total: 2

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

Analysis

Hierarchy

yiyioptical.com is the parent of mail.yiyioptical.com.

Name Servers

yiyioptical.com is delegated to two name servers ns1.udomain.com and ns2.udomain.com.

yiyioptical.com shares the same name server setup as other domains, for instance peachjohn.com.hk, xn--1ct365bd6rlmj.com, wellcome.hk, 7-eleven.com.hk and mydcc.hk.

yiyioptical.com at least partially shares name servers with other domains, for instance hsh-grt.com, ezrx.com.hk, artsinfinite.com and homurice.com.

These name servers are commonly used alongside ns1.udomain.net and ns2.udomain.net.

Host names with one IP number:

ns1.udomain.com points to 45.121.194.9

ns2.udomain.com points to 45.121.198.9

Mail Servers

yiyioptical.com is handled by a single mail server, mail.yiyioptical.com.

mail.yiyioptical.com resolves to IP 116.92.187.98.

yiyioptical.com - robtex.com

yiyioptical.com

com