`linux.college`

DNSSEC	⚠️ Not signed
A	192.241.196.53^{🇺🇸 DIGITALOCEAN192.241.192.0/19 DigitalOcean}
NS	`ns1.digitalocean.com` ⭐
		A	2606:4700:52::ac40:34d2^{🇺🇸 Cloudflare2606:4700:52::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns1.digitalocean.com`
		A	172.64.52.210^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns1.digitalocean.com`
NS	`ns2.digitalocean.com`
		A	2606:4700:5a::ac40:3515^{🇺🇸 Cloudflare2606:4700:5a::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns2.digitalocean.com`
		A	172.64.53.21^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns2.digitalocean.com`
NS	`ns3.digitalocean.com`
		A	2606:4700:52::ac40:31d1^{🇺🇸 Cloudflare2606:4700:52::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns3.digitalocean.com`
		A	172.64.49.209^{🇺🇸 Cloudflare172.64.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns3.digitalocean.com`
MX	`mx2.zoho.com` ⭐
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`v=spf1 include:zoho.com ~all`
SOA	`ns1.digitalocean.com`hostmaster@linux.college serial=0

`college`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.nic.college`
	NS	`b.nic.college`
	NS	`c.nic.college`
	NS	`d.nic.college`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=3000459158

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DNS History

7 records (7 active, 0 former)

●NSns1.digitalocean.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●NSns2.digitalocean.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●NSns3.digitalocean.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●MXmx.zoho.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●MXmx2.zoho.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●MXmx3.zoho.com2019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

●A192.241.196.532019-12-13 → 2026-04-23 · 2 obs

● 2019-12-13 15:36:14
● 2026-04-23 11:38:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
college	a.nic.college, b.nic.college, c.nic.college, d.nic.college	8 records
linux.college	ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com	-

✅ Authoritative Response

Server:172.64.49.209

NS records: ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linux.college (unsigned zone)

⏱️ Timing

Total: 823ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.241.196.53`
NS	3	`ns2.digitalocean.com, ns3.digitalocean.com...`
MX	3	`mx2.zoho.com (pri: 20), mx3.zoho.com (pri: 50)...`
TXT	1	`v=spf1 include:zoho.com ~all`
SOA	1	`ns1.digitalocean.com hostmaster.linux.co`