caltechsys.com - dns.ninja

`caltechsys.com`

DNSSEC	⚠️ Not signed
A	198.202.211.1^{🇺🇸 CLOUDFLARESPECTRUM198.202.211.0/24 Webflow}
NS	`dns1.registrar-servers.com` ⭐
		A	2610:a1:1024::200^{🇺🇸 MAINT-ID-120082610:a1:1024::/48 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
		A	156.154.132.200^{🇺🇸 MAINT-ID-12008156.154.132.0/24 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
NS	`dns2.registrar-servers.com`
		A	2610:a1:1025::200^{🇺🇸 MAINT-ID-120082610:a1:1025::/48 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
		A	156.154.133.200^{🇺🇸 MAINT-ID-12008156.154.133.0/24 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
MX	`caltechsys-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c801::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sn1pr0501cu00101.inbound.protection.outlook.com`
		A	2a01:111:f403:c936::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-cy1pr05cu00400.inbound.protection.outlook.com`
		A	2a01:111:f403:f805::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-co1pr03cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:f90d::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sn1pr0501cu00200.inbound.protection.outlook.com`
		A	52.101.11.9^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sn1pr02cu00101.inbound.protection.outlook.com`
		A	52.101.42.14^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mw2pr04cu00106.inbound.protection.outlook.com`
		A	52.101.194.4^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch4pr04cu00104.inbound.protection.outlook.com`
		A	52.101.194.17^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch5pr02cu00401.inbound.protection.outlook.com`
TXT	`MS=ms43730826`
TXT	`sophos-domain-verification=3fc7497b43f640137ddbf969a783407e45f15ac3`
TXT	`v=spf1 include:spf.protection.outlook.com include:spf.happyfox.com -all`
TXT	`sophos-domain-verification=7fe6c5391fc4661f10ebe381f22aab2fffcc3a43209317d75b...`
SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1777019497

`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=1782061150

WOT: UNKNOWN (68/100)

Subdomains

mail.caltechsys.com

Same first word

caltechsys.com

Similar names

techclassy.com

calsystech.com

DNS History

11 records (4 active, 7 former)

●NSdns1.registrar-servers.com2026-03-21 → 2026-06-21 · 3 obs

○ 2019-01-21 21:23:34
● 2026-03-21 07:48:26
● 2026-06-21 17:24:36

●NSdns2.registrar-servers.com2026-03-21 → 2026-06-21 · 3 obs

○ 2019-01-21 21:23:34
● 2026-03-21 07:48:26
● 2026-06-21 17:24:36

○NSns25.domaincontrol.com2015-08-11 → 2019-01-21 · 4 obs

● 2015-08-11 04:13:38
● 2019-01-21 21:23:34
○ 2026-03-21 07:48:26
○ 2026-06-21 17:24:36

○NSns26.domaincontrol.com2015-08-11 → 2019-01-21 · 4 obs

● 2015-08-11 04:13:38
● 2019-01-21 21:23:34
○ 2026-03-21 07:48:26
○ 2026-06-21 17:24:36

●MXcaltechsys-com.mail.protection.outlook.com2026-03-21 → 2026-06-21 · 3 obs

○ 2019-01-21 21:23:34
● 2026-03-21 07:48:26
● 2026-06-21 17:24:36

○MXmailstore1.secureserver.net2015-08-11 → 2017-02-15 · 4 obs

● 2015-08-11 04:13:38
● 2017-02-15 08:13:52
○ 2019-01-21 21:23:34
○ 2026-06-21 17:24:36

○MXsmtp.secureserver.net2015-08-11 → 2017-02-15 · 4 obs

● 2015-08-11 04:13:38
● 2017-02-15 08:13:52
○ 2019-01-21 21:23:34
○ 2026-06-21 17:24:36

○A184.168.27.1162015-08-11 → 2017-02-15 · 4 obs

● 2015-08-11 04:13:38
● 2017-02-15 08:13:52
○ 2019-01-21 21:23:34
○ 2026-06-21 17:24:36

●A198.202.211.12026-05-02 → 2026-06-21 · 3 obs

○ 2026-04-22 07:40:40
● 2026-05-02 01:16:02
● 2026-06-21 17:24:36

○A68.74.206.2112019-01-21 → 2019-01-21 · 4 obs

○ 2017-02-15 08:13:52
● 2019-01-21 21:23:34
○ 2026-03-21 07:48:26
○ 2026-06-21 17:24:36

○A75.56.10.1532026-03-21 → 2026-04-22 · 5 obs

○ 2019-01-21 21:23:34
● 2026-03-21 07:48:26
● 2026-04-22 07:40:40
○ 2026-05-02 01:16:02
○ 2026-06-21 17:24:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, a.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net...	-
caltechsys.com	dns1.registrar-servers.com, dns2.registrar-servers.com	4 records

✅ Authoritative Response

Server:156.154.132.200

NS records: dns1.registrar-servers.com, dns2.registrar-servers.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for caltechsys.com (unsigned zone)

⏱️ Timing

Total: 175ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`198.202.211.1`
NS	2	`dns1.registrar-servers.com, dns2.registrar-servers.com`
MX	1	`caltechsys-com.mail.protection.outlook.c`
TXT	4	`MS=ms43730826, sophos-domain-verification=3fc7497b43f64...`
SOA	1	`dns1.registrar-servers.com hostmaster.re`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (dns1.registrar-servers.com, dns1.registrar-servers.com, dns2.registrar-servers.com...)

Analysis

Hierarchy

mail.caltechsys.com is delegated beneath caltechsys.com.

IP Addresses

caltechsys.com resolves to just one IP address, 198.202.211.1.

Two other host names, along with cecilam.dk, jodymillerconstruction.com and sdox.io, also share IP numbers with caltechsys.com.

Name Servers

DNS delegation for caltechsys.com points to two name servers: dns1.registrar-servers.com and dns2.registrar-servers.com.

caltechsys.com shares its NS records with other domains, for example hewodx.com, bookablebeds.com, diyknot.com and two others.

There is at least partial name server overlap between caltechsys.com and other domains — bitauth.org, thepattersonproject.com, 90y.org and two more among them.

The name servers dns3.registrar-servers.com, dns4.registrar-servers.com and dns5.registrar-servers.com are often found in combination with these name servers.

dns1.registrar-servers.com directs to 156.154.132.200 and 2610:a1:1024::200. dns2.registrar-servers.com directs to 156.154.133.200 and 2610:a1:1025::200. Each host name carries two IP addresses.

Mail Servers

The sole mail server for caltechsys.com is caltechsys-com.mail.protection.outlook.com.

With 8 IP addresses total, caltechsys-com.mail.protection.outlook.com resolves to 52.101.11.9, 52.101.42.14, 52.101.194.4 and 5 others.