rkbinstruments.com - dns.ninja

`rkbinstruments.com`

DNSSEC	⚠️ Not signed
A	104.236.166.133^{🇺🇸 DIGITALOCEAN104.236.128.0/18 DigitalOcean}
		PTR	`115081.cloudwaysapps.com`
NS	`ns11.domaincontrol.com` ⭐
		A	2603:5:2190::6^{🇺🇸 GODADDY-DNS2603:5:2190::/44}
			PTR	`ns11.domaincontrol.com`
		A	97.74.105.6^{🇺🇸 GODADDY-DNS97.74.104.0/23}
			PTR	`ns11.domaincontrol.com`
NS	`ns12.domaincontrol.com`
		A	2603:5:2290::6^{🇺🇸 GODADDY-DNS2603:5:2290::/44}
			PTR	`ns12.domaincontrol.com`
		A	173.201.73.6^{🇺🇸 GODADDY-DNS173.201.72.0/23}
			PTR	`ns12.domaincontrol.com`
MX	`mx1.emailsrvr.com` ⭐
		A	146.20.161.1^{🇺🇸 RACKSPACE-IAD146.20.0.0/16 Rackspace US Inc}
			PTR	`mx1.emailsrvr.com`
MX	`mx2.emailsrvr.com`⁽²⁰⁾
		A	173.203.187.2^{🇺🇸 RACKSPACE-IAD173.203.128.0/18 Rackspace Managed Hosting, 9725 Data point drive, Suite 100, San Antonio, TX 78229}
			PTR	`mx2.emailsrvr.com`
TXT	`v=spf1 a mx include:_spf.elasticemail.com ~all`
TXT	`v=spf1 include:emailsrvr.com -all`
SOA	`ns11.domaincontrol.com`dns@jomax.net 2024-04-24 #3

`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=1785559967

Same first word

rkbinstruments.com

DNS History

9 records (5 active, 4 former)

○NSns1.bluehost.com2016-12-17 → 2017-09-01 · 4 obs

● 2016-12-17 07:18:16
● 2017-09-01 09:54:36
○ 2026-02-23 14:30:18
○ 2026-08-01 05:06:46

●NSns11.domaincontrol.com2026-02-23 → 2026-08-01 · 3 obs

○ 2017-09-01 09:54:36
● 2026-02-23 14:30:18
● 2026-08-01 05:06:46

●NSns12.domaincontrol.com2026-02-23 → 2026-08-01 · 3 obs

○ 2017-09-01 09:54:36
● 2026-02-23 14:30:18
● 2026-08-01 05:06:46

○NSns2.bluehost.com2016-12-17 → 2017-09-01 · 4 obs

● 2016-12-17 07:18:16
● 2017-09-01 09:54:36
○ 2026-02-23 14:30:18
○ 2026-08-01 05:06:46

○MXmail.rkbinstruments.com2016-12-17 → 2017-09-01 · 4 obs

● 2016-12-17 07:18:16
● 2017-09-01 09:54:36
○ 2026-02-23 14:30:18
○ 2026-08-01 05:06:46

●MXmx1.emailsrvr.com2026-02-23 → 2026-08-01 · 3 obs

○ 2017-09-01 09:54:36
● 2026-02-23 14:30:18
● 2026-08-01 05:06:46

●MXmx2.emailsrvr.com2026-02-23 → 2026-08-01 · 3 obs

○ 2017-09-01 09:54:36
● 2026-02-23 14:30:18
● 2026-08-01 05:06:46

●A104.236.166.1332026-02-23 → 2026-08-01 · 3 obs

○ 2017-09-01 09:54:36
● 2026-02-23 14:30:18
● 2026-08-01 05:06:46

○A162.214.1.432016-12-17 → 2017-09-01 · 4 obs

● 2016-12-17 07:18:16
● 2017-09-01 09:54:36
○ 2026-02-23 14:30:18
○ 2026-08-01 05:06:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net, h.gtld-servers.net...	-
rkbinstruments.com	ns11.domaincontrol.com, ns12.domaincontrol.com	4 records

✅ Authoritative Response

Server:97.74.105.6

NS records: ns11.domaincontrol.com, ns12.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rkbinstruments.com (unsigned zone)

⏱️ Timing

Total: 127ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.236.166.133`
NS	2	`ns11.domaincontrol.com, ns12.domaincontrol.com`
MX	2	`mx2.emailsrvr.com (pri: 20), mx1.emailsrvr.com (pri: 10)`
TXT	2	`v=spf1 a mx include:_spf.elasticemail.co, v=spf1 include:emailsrvr.com -all`
SOA	1	`ns11.domaincontrol.com dns.jomax.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns11.domaincontrol.com, ns11.domaincontrol.com, ns12.domaincontrol.com...)

Analysis

IP Addresses

rkbinstruments.com resolves to just one IP address, 104.236.166.133.

Host names such as htstechsupport.com and computerorthoptics.com share IP numbers with rkbinstruments.com.

Name Servers

DNS delegation for rkbinstruments.com points to two name servers: ns11.domaincontrol.com and ns12.domaincontrol.com.

rkbinstruments.com shares its NS records with other domains, for example thortrains.com, bajajassociates.net, iclde.com and two others.

ns11.domaincontrol.com directs to 97.74.105.6 and 2603:5:2190::6. ns12.domaincontrol.com directs to 173.201.73.6 and 2603:5:2290::6. Each host name carries two IP addresses.

Mail Servers

rkbinstruments.com is served by two mail servers, mx1.emailsrvr.com and mx2.emailsrvr.com.

Among the domains sharing a mail server setup with rkbinstruments.com are kadac.co.uk, swshanklin.net, hilltophousebb.com and two others.

There is at least a partial MX overlap between rkbinstruments.com and other domains, including lupusnj.org, alfredo-pauly.de, mypfw.com and two others.

mx1.emailsrvr.com and mx2.emailsrvr.com each resolve to one IP number: mx1.emailsrvr.com points to 146.20.161.1 and mx2.emailsrvr.com points to 173.203.187.2.