`sybexsystems.com`

DNSSEC	⚠️ Not signed
A	156.247.113.196^{🇧🇷 GNET-AS9294156.247.112.0/20}
NS	`n1.xundns.com` ⭐
		A	2409:8c44:1b00:601:1:1110:609:6027^{🇨🇳 CHINAMOBILE-CN2409:8c44:1b00::/48 CMI (Customer Route)}
		A	2604:86c0:5001:11::2659:466b^{🇺🇸 AS630232604:86c0:5000::/36 GTHOST-SEA}
		A	38.89.70.107^{🇺🇸 AS6302338.89.70.0/24 Route Registered for Cogent Communications Customer - GlobalTelehost Corp}
			PTR	`107-70-89-38.clients.gthost.com`
		A	111.6.96.27^{🇨🇳 CHINAMOBILE-CN111.6.96.0/21 CMI (Customer Route)}
NS	`n2.xundns.com`
		A	2408:8621:0:42:e401:402:0:a^{🇨🇳 CHINA169-Backbone2408:8621::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2408:8722:1801:10:4:611:6303:181^{🇨🇳 CHINA169-Backbone2408:8722::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2604:86c0:6001:8::a9c5:8e51^{🇺🇸 AS630232604:86c0:6000::/36 GTHOST-SCL}
		A	61.163.30.181^{🇨🇳 CHINA169-Backbone61.163.0.0/16 CNC Group CHINA169 Henan Province Network}
			PTR	`hn.ly.kd.adsl`
		A	122.114.37.19^{🇨🇳 CHINA169-Backbone122.114.0.0/16 route of Chinaunicomroute of Chinaunicom}
		A	169.197.142.81^{🇺🇸 AS63023169.197.142.0/24 GlobalTeleHost}
			PTR	`81-142-197-169.clients.gthost.com`
SOA	`n1.xundns.com`nsadmin@xundns.com serial=437896

`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=1774916757

rank #566712 globally
rank #255054 in the tld

Same first word

sybexsystems.com

DNS History

7 records (3 active, 4 former)

●NSn1.xundns.com2026-03-23 → 2026-03-31 · 3 obs

○ 2017-03-25 10:40:32
● 2026-03-23 18:32:40
● 2026-03-31 00:50:24

●NSn2.xundns.com2026-03-23 → 2026-03-31 · 3 obs

○ 2017-03-25 10:40:32
● 2026-03-23 18:32:40
● 2026-03-31 00:50:24

○NSns1.bluehost.com2015-08-23 → 2017-03-25 · 4 obs

● 2015-08-23 07:55:36
● 2017-03-25 10:40:32
○ 2026-03-23 18:32:40
○ 2026-03-31 00:50:24

○NSns2.bluehost.com2015-08-23 → 2017-03-25 · 4 obs

● 2015-08-23 07:55:36
● 2017-03-25 10:40:32
○ 2026-03-23 18:32:40
○ 2026-03-31 00:50:24

○MXmail.sybexsystems.com2015-08-23 → 2017-03-25 · 4 obs

● 2015-08-23 07:55:36
● 2017-03-25 10:40:32
○ 2026-03-23 18:32:40
○ 2026-03-31 00:50:24

●A156.247.113.1962026-03-23 → 2026-03-31 · 3 obs

○ 2017-03-25 10:40:32
● 2026-03-23 18:32:40
● 2026-03-31 00:50:24

○A69.89.31.992015-08-23 → 2017-03-25 · 4 obs

● 2015-08-23 07:55:36
● 2017-03-25 10:40:32
○ 2026-03-23 18:32:40
○ 2026-03-31 00:50:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
sybexsystems.com	n1.xundns.com, n2.xundns.com	11 records

✅ Authoritative Response

Server:122.114.37.19

NS records: n1.xundns.com, n2.xundns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sybexsystems.com (unsigned zone)

⏱️ Timing

Total: 1198ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`156.247.113.196`
NS	2	`n1.xundns.com, n2.xundns.com`
SOA	1	`n1.xundns.com nsadmin.xundns.com`

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (n1.xundns.com, n1.xundns.com, n1.xundns.com...)

Analysis

IP Addresses

sybexsystems.com points to a single IP number: 156.247.113.196.

Other host names such as macaweb.com, letikong.com and xinda-cn.com share IP numbers with sybexsystems.com.

Name Servers

Delegation for sybexsystems.com rests with two name servers, n1.xundns.com and n2.xundns.com.

sybexsystems.com shares the same name server setup as other domains, including ohta-seiki.com, jchfrp.com, sdqhdkj.com, 83925216.com and 09196.cc.

sybexsystems.com at least partially shares name servers with other domains, for instance converflex.biz, qq999uu666.com, kj7988.com, picunutrition.org and 619641.com.

These name servers are commonly used with v1s1.xundns.com and v1s2.xundns.com.

Host names with six IP numbers:

n2.xundns.com points to 2408:8621:0:42:e401:402:0:a, 2408:8722:1801:10:4:611:6303:181, 2604:86c0:6001:8::a9c5:8e51, 61.163.30.181, 122.114.37.19 and 169.197.142.81.

Host names with four IP numbers:

n1.xundns.com points to 2409:8c44:1b00:601:1:1110:609:6027, 2604:86c0:5001:11::2659:466b, 38.89.70.107 and 111.6.96.27.

sybexsystems.com - robtex.com