`instructorscorner.org`

DNSSEC	⚠️ Not signed
A	40.71.11.131^{🇺🇸 Microsoft40.68.0.0/14}
NS	`cortney.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a57^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cortney.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c057^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`cortney.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2057^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`cortney.ns.cloudflare.com`
		A	108.162.192.87^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cortney.ns.cloudflare.com`
		A	172.64.32.87^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cortney.ns.cloudflare.com`
		A	173.245.58.87^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cortney.ns.cloudflare.com`
NS	`ernest.ns.cloudflare.com`
		A	2606:4700:58::adf5:3ba4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ernest.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1a4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ernest.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21a4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ernest.ns.cloudflare.com`
		A	108.162.193.164^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ernest.ns.cloudflare.com`
		A	172.64.33.164^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ernest.ns.cloudflare.com`
		A	173.245.59.164^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ernest.ns.cloudflare.com`
TXT	`americanredcross.azurewebsites.net`
TXT	`v=spf1 -all`
SOA	`cortney.ns.cloudflare.com`dns@cloudflare.com serial=2397011193

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1771291736

WOT: SAFE (62/100)

Same first word

instructorscorner.com

DNS History

15 records (3 active, 12 former)

●NScortney.ns.cloudflare.com2026-03-05 → 2026-03-05 · 3 obs

○ 2016-08-12 16:35:44
● 2026-03-05 18:32:06
● 2026-03-05 18:32:12

●NSernest.ns.cloudflare.com2026-03-05 → 2026-03-05 · 3 obs

○ 2016-08-12 16:35:44
● 2026-03-05 18:32:06
● 2026-03-05 18:32:12

○NSns-1171.awsdns-18.org2015-08-06 → 2015-11-11 · 4 obs

● 2015-08-06 20:15:56
● 2015-11-11 09:20:38
○ 2016-01-26 16:07:14
○ 2026-03-05 18:32:12

○NSns-1814.awsdns-34.co.uk2015-08-06 → 2015-11-11 · 4 obs

● 2015-08-06 20:15:56
● 2015-11-11 09:20:38
○ 2016-01-26 16:07:14
○ 2026-03-05 18:32:12

○NSns-46.awsdns-05.com2015-08-06 → 2015-11-11 · 4 obs

● 2015-08-06 20:15:56
● 2015-11-11 09:20:38
○ 2016-01-26 16:07:14
○ 2026-03-05 18:32:12

○NSns-965.awsdns-56.net2015-08-06 → 2015-11-11 · 4 obs

● 2015-08-06 20:15:56
● 2015-11-11 09:20:38
○ 2016-01-26 16:07:14
○ 2026-03-05 18:32:12

○NSns1.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns2.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns3.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns4.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns5.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns6.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○NSns7.markmonitor.com2016-01-26 → 2016-08-12 · 5 obs

○ 2015-11-11 09:20:38
● 2016-01-26 16:07:14
● 2016-08-12 16:35:44
○ 2026-03-05 18:32:06
○ 2026-03-05 18:32:12

○A174.129.170.1032015-08-06 → 2015-11-11 · 4 obs

● 2015-08-06 20:15:56
● 2015-11-11 09:20:38
○ 2016-01-26 16:07:14
○ 2026-03-05 18:32:12

●A40.71.11.1312026-03-05 → 2026-03-05 · 3 obs

○ 2016-01-26 16:07:14
● 2026-03-05 18:32:06
● 2026-03-05 18:32:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
instructorscorner.org	ernest.ns.cloudflare.com, cortney.ns.cloudflare.com	-

✅ Authoritative Response

Server: 108.162.193.164

NS records: ernest.ns.cloudflare.com, cortney.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructorscorner.org (unsigned zone)

⏱️ Timing

Total: 405ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`40.71.11.131`
NS	2	`cortney.ns.cloudflare.com, ernest.ns.cloudflare.com`
TXT	2	`americanredcross.azurewebsites.net, v=spf1 -all`
SOA	1	`cortney.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

instructorscorner.org points to a single IP address: 40.71.11.131.

Other host names such as americashomeplace.com, pcassistants.com, redcross.org, redcrosschat.org and americanredcross.org share IPs with instructorscorner.org.

Name Servers

Two name servers cortney.ns.cloudflare.com and ernest.ns.cloudflare.com handle the delegation for instructorscorner.org.

instructorscorner.org shares the same name server setup as other domains, for example essaywritingstore.com, marvelousessay.org, arader.org, amberhats.com and best-essays-service.org.

instructorscorner.org at least partially shares name servers with other domains, for example notarialoratamayo.es, hookuplesbians.com, i(0x706f726e)shop.com, bet5602.com and 4adb91439146.com.

These name servers are often used together with coco.ns.cloudflare.com and karina.ns.cloudflare.com.

Host names with six IP numbers:

cortney.ns.cloudflare.com points to 2606:4700:50::adf5:3a57, 2803:f800:50::6ca2:c057, 2a06:98c1:50::ac40:2057, 108.162.192.87, 172.64.32.87 and 173.245.58.87.

ernest.ns.cloudflare.com points to 2606:4700:58::adf5:3ba4, 2803:f800:50::6ca2:c1a4, 2a06:98c1:50::ac40:21a4, 108.162.193.164, 172.64.33.164 and 173.245.59.164.

instructorscorner.org - robtex.com