link.codecademy.com - dns.ninja

`link.codecademy.com`

CNAME	`sendgrid.net`
DNSSEC	⚠️ Not signed
A	3.20.87.51^{🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix}
		PTR	`ec2-3-20-87-51.us-east-2.compute.amazonaws.com`
A	3.20.194.73^{🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix}
A	3.220.122.174^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
A	3.231.179.208^{🇺🇸 Amazon3.224.0.0/12 EC2 IAD prefix}
A	18.224.219.179^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
A	54.158.174.185^{🇺🇸 Amazon54.156.0.0/14 EC2 IAD prefix}
NS	`ns10.dnsmadeeasy.com` ⭐
		A	2600:1800:10::1^{🇺🇸 Tiggee2600:1800:10::/48 DNS Made Easy anycast network}
			PTR	`ns10.dnsmadeeasy.com`
		A	208.94.148.4^{🇺🇸 Tiggee208.94.148.0/24 DNS Made Easy anycast network}
			PTR	`ns10.dnsmadeeasy.com`
NS	`ns11.dnsmadeeasy.com`
		A	2600:1801:11::1^{🇺🇸 Tiggee2600:1801:11::/48 DNS Made Easy anycast network}
			PTR	`ns11.dnsmadeeasy.com`
		A	208.80.124.4^{🇺🇸 Tiggee208.80.124.0/24 DNS Made Easy anycast network}
			PTR	`ns11.dnsmadeeasy.com`
NS	`ns12.dnsmadeeasy.com`
		A	2600:1802:12::1^{🇺🇸 Tiggee2600:1802:12::/48 DNS Made Easy anycast network}
			PTR	`ns12.dnsmadeeasy.com`
		A	208.80.126.4^{🇺🇸 Tiggee208.80.126.0/24 DNS Made Easy anycast network}
			PTR	`ns12.dnsmadeeasy.com`
NS	`ns13.dnsmadeeasy.com`
		A	2600:1801:13::1^{🇺🇸 Tiggee2600:1801:13::/48 DNS Made Easy anycast network}
			PTR	`ns13.dnsmadeeasy.com`
		A	208.80.125.4^{🇺🇸 Tiggee208.80.125.0/24 DNS Made Easy anycast network}
			PTR	`ns13.dnsmadeeasy.com`
NS	`ns14.dnsmadeeasy.com`
		A	2600:1802:14::1^{🇺🇸 Tiggee2600:1802:14::/48 DNS Made Easy anycast network}
			PTR	`ns14.dnsmadeeasy.com`
		A	208.80.127.4^{🇺🇸 Tiggee208.80.127.0/24 DNS Made Easy anycast network}
			PTR	`ns14.dnsmadeeasy.com`
NS	`ns15.dnsmadeeasy.com`
		A	2600:1800:15::1^{🇺🇸 Tiggee2600:1800:15::/48 DNS Made Easy anycast network}
			PTR	`ns15.dnsmadeeasy.com`
		A	208.94.149.4^{🇺🇸 Tiggee208.94.149.0/24 DNS Made Easy anycast network}
			PTR	`ns15.dnsmadeeasy.com`
MX	`mx2.sendgrid.net` ⭐
		A	3.17.120.38^{🇺🇸 Amazon3.16.0.0/14 EC2 CMH prefix}
			PTR	`ec2-3-17-120-38.us-east-2.compute.amazonaws.com`
		A	3.136.245.72^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
			PTR	`ec2-3-136-245-72.us-east-2.compute.amazonaws.com`
		A	13.216.54.185^{🇺🇸 Amazon13.216.0.0/13 EC2 IAD prefix}
			PTR	`ec2-13-216-54-185.compute-1.amazonaws.com`
		A	18.224.101.244^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
			PTR	`ec2-18-224-101-244.us-east-2.compute.amazonaws.com`
		A	34.198.67.24^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
			PTR	`ec2-34-198-67-24.compute-1.amazonaws.com`
		A	44.216.124.122^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-216-124-122.compute-1.amazonaws.com`
		A	44.245.249.202^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-245-249-202.us-west-2.compute.amazonaws.com`
		A	52.25.213.239^{🇺🇸 Amazon52.24.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-25-213-239.us-west-2.compute.amazonaws.com`
		A	52.37.49.26^{🇺🇸 Amazon52.36.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-37-49-26.us-west-2.compute.amazonaws.com`
MX	`mx.sendgrid.net`⁽²⁰⁾
		A	3.17.120.38^{🇺🇸 Amazon3.16.0.0/14 EC2 CMH prefix}
			PTR	`ec2-3-17-120-38.us-east-2.compute.amazonaws.com`
		A	3.136.245.72^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
			PTR	`ec2-3-136-245-72.us-east-2.compute.amazonaws.com`
		A	13.216.54.185^{🇺🇸 Amazon13.216.0.0/13 EC2 IAD prefix}
			PTR	`ec2-13-216-54-185.compute-1.amazonaws.com`
		A	15.222.160.229^{🇨🇦 Amazon15.222.0.0/15 EC2 YUL prefix}
			PTR	`ec2-15-222-160-229.ca-central-1.compute.amazonaws.com`
		A	16.52.61.209^{🇺🇸 Amazon16.52.0.0/16 EC2 YUL prefix}
			PTR	`ec2-16-52-61-209.ca-central-1.compute.amazonaws.com`
		A	16.52.110.174^{🇺🇸 Amazon16.52.0.0/16 EC2 YUL prefix}
			PTR	`ec2-16-52-110-174.ca-central-1.compute.amazonaws.com`
		A	18.224.101.244^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
			PTR	`ec2-18-224-101-244.us-east-2.compute.amazonaws.com`
		A	34.198.67.24^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
			PTR	`ec2-34-198-67-24.compute-1.amazonaws.com`
		A	44.216.124.122^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-216-124-122.compute-1.amazonaws.com`
		A	44.245.249.202^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-245-249-202.us-west-2.compute.amazonaws.com`
		A	52.25.213.239^{🇺🇸 Amazon52.24.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-25-213-239.us-west-2.compute.amazonaws.com`
		A	52.37.49.26^{🇺🇸 Amazon52.36.0.0/14 EC2 PDX prefix}
			PTR	`ec2-52-37-49-26.us-west-2.compute.amazonaws.com`
TXT	`cemmvnbghpsb500d7c19e35fgm`
TXT	`yahoo-verification-key=TrufSXS+dfythA5AIMbLUnkX38rjr1HR93gbqHUSY74=`
TXT	`google-site-verification=1UEf8ey-RibUjY6gnpqIZFjWNqMknmeyeHz1zTmj0DE`
TXT	`p8bnb2lp424dkl3c4io1aemiei`
TXT	`l8bqrl0r33q4joeb79q8uuj009`
TXT	`i52uk89q4nfe1mpgqv5qsmsj3j.`
TXT	`6ifgg010qg6mquqt5lodun8qds`
TXT	`utjqqjvmeadmlva41ectre9gd3`
TXT	`5m3r13nvilmq8tgf5foh6ki1uv`
TXT	`v=spf1 ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144...`
TXT	`mailru-verification: 2e3995fa8a7d00e0`
SOA	`ns10.dnsmadeeasy.com`dns@dnsmadeeasy.com serial=2011298671

`codecademy.com`

DNSSEC	⚠️ Not signed
A	2606:4700::6811:b778^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700::6811:b878^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.17.183.120^{Cloudflare104.17.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.17.184.120^{Cloudflare104.17.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`arnold.ns.cloudflare.com` ⭐
NS	`serena.ns.cloudflare.com`
MX	`codecademy-com.mail.protection.outlook.com` ⭐
TXT	`MS=79764F463C8CD2E367B5BF7B1DF1B1C9FFE48501`
TXT	`MS=ms80117904`
TXT	`Mosyle-verification-1750951629`
TXT	`apple-domain-verification=6j9Dh5BuEBtMWMMg`
TXT	`atlassian-domain-verification=m7Ac1Hv/T4ePJa3hgcqMgYHykrG65YAE+oy9aqlN+aDA0kh...`
TXT	`facebook-domain-verification=mm5a3aemk4cv9yfjikcr4de2xn0ait`
TXT	`figma-domain-verification=8c0a9ebe2f3a594d9d85faed8994ef2b073a992b28ea6a3e9fa...`
TXT	`google-gws-recovery-domain-verification=57013633`
TXT	`google-site-verification=0pRbsGszBlAjZisxsJ2qJLXoXIKCdDlCSK_67hy5BjY`
TXT	`google-site-verification=1pIE7oxQFgbaSths1CckFlGEYBHxpp5pD9F_ZUCcSVA`
TXT	`google-site-verification=BAzjINWd55GJVC7I66cdi0SXSLENbMENU9tqByphDmQ`
TXT	`google-site-verification=BB5unuHbdt4pYsHrMorf_R-mKcUdy5Bk2vvz0Ie_q44`
TXT	`google-site-verification=H0SayPMoRT_4rzjNrg2YvbxiRvQbqSTlwSM0D0wht8U`
TXT	`google-site-verification=M2VbalsxRQjMfelTnHdpgHIeqOKE6CYWnhj6VbGMFH8`
TXT	`google-site-verification=dqlGjeLuQLofS51hgFB6ptoJWM0EkcPoe7G1gmL9muw`
TXT	`google-site-verification=vIdZhswzF-KMQmIllHFhS6VnmeHUvsCKTccrXjab-Lw`
TXT	`google-site-verification=wkpord_VFYRlAcjf2hV21FHnsScCpA9YiMOQqACXsvQ`
TXT	`openai-domain-verification=dv-RFgs6gJx1YSwFBosC1y2RA1n`
TXT	`segment-site-verification=NJFFQLAhEEX3Uyz0vgrzNf3fplm6iYsg`
TXT	`v=DKIM1; p=`
TXT	`v=spf1 include:customeriomail.com include:mail.zendesk.com include:_spf.googl...`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.17.183.120, 104.17.184.120
		IPv6 hints	2606:4700::6811:b778, 2606:4700::6811:b878
SOA	`arnold.ns.cloudflare.com`dns@cloudflare.com serial=2411132416

WOT: SAFE (95/100)
rank #1775 globally
rank #947 in the tld
WOT: SAFE (94/100)
📈 Tranco rank: #5,521

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DNS History

1 record (1 active, 0 former)

●CNAMEsendgrid.net2020-03-30 → 2026-08-04 · 2 obs

● 2020-03-30 13:11:04
● 2026-08-04 07:08:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, f.gtld-servers.net...	-
codecademy.com	arnold.ns.cloudflare.com, serena.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.69

NS records: arnold.ns.cloudflare.com, serena.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for codecademy.com (unsigned zone)

⏱️ Timing

Total: 670ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`sendgrid.net`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (arnold.ns.cloudflare.com, arnold.ns.cloudflare.com, arnold.ns.cloudflare.com...)

Analysis

IP Addresses

link.codecademy.com resolves to 6 IP numbers: 3.20.87.51, 3.20.194.73, 3.220.122.174 and 3 other.

Additional host names — ec2-3-20-194-73.us-east-2.compute.amazonaws.com, ec2-3-220-122-174.compute-1.amazonaws.com, rejectshop.com.au and two others — share IP numbers with link.codecademy.com.

Name Servers

DNS for link.codecademy.com is handled by 6 name servers: ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com and 3 others.

link.codecademy.com partially shares its NS delegation with several other domains, including mcicarbon.com, havenfencing.com.au, cei-ut.com and two others.

The name servers ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com and ns20.digicertdns.com are often found in use alongside these name servers.

Host names with two IP numbers:

ns10.dnsmadeeasy.com has two IP addresses: 208.94.148.4 and 2600:1800:10::1.

ns11.dnsmadeeasy.com has two IP addresses: 208.80.124.4 and 2600:1801:11::1.

ns12.dnsmadeeasy.com has two IP addresses: 208.80.126.4 and 2600:1802:12::1.

ns13.dnsmadeeasy.com has two IP addresses: 208.80.125.4 and 2600:1801:13::1.

ns14.dnsmadeeasy.com has two IP addresses: 208.80.127.4 and 2600:1802:14::1.

ns15.dnsmadeeasy.com has two IP addresses: 208.94.149.4 and 2600:1800:15::1.

Mail Servers

link.codecademy.com has two mail servers: mx2.sendgrid.net and mx.sendgrid.net.

link.codecademy.com shares the same mail server setup as other domains, including etitan.hu, trustpilotservice.com, pipedrivemail.com and two others.

link.codecademy.com shares mail servers — at least in part — with other domains, including mail.pureagent.net, offthechartsblog.org, traus.com.br and two others.

These mail servers are frequently used alongside mail servers mx3.sendgrid.net, mx4.sendgrid.net, mx5.sendgrid.net and 4 other.

Host names with 12 IP numbers:

mx.sendgrid.net has IP addresses 3.17.120.38, 3.136.245.72 and 13.216.54.185, plus 9 other.

Host names with 9 IP numbers:

mx2.sendgrid.net has IP addresses 3.17.120.38, 3.136.245.72 and 13.216.54.185, plus 6 other.

Host names pointing to 3.17.120.38 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 3.136.245.72 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 13.216.54.185 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 18.224.101.244 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 34.198.67.24 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 44.216.124.122 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 44.245.249.202 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 52.25.213.239 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.

Host names pointing to 52.37.49.26 IP addresses: mx.sendgrid.net and mx2.sendgrid.net.