tracking.masterclass.com - dns.ninja

`tracking.masterclass.com`

CNAME	`spgo.io`
DNSSEC	⚠️ Not signed
A	35.160.36.78^{🇺🇸 Amazon35.160.0.0/13 EC2 PDX prefix}
		PTR	`ec2-35-160-36-78.us-west-2.compute.amazonaws.com`
A	54.190.219.180^{🇺🇸 Amazon54.190.0.0/16 EC2 PDX prefix}
A	184.33.157.103^{🇺🇸 Amazon184.32.0.0/14 EC2 Prefix}
NS	`ns-678.awsdns-20.net` ⭐
		A	2600:9000:5302:a600::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-678.awsdns-20.net`
		A	205.251.194.166^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-678.awsdns-20.net`
NS	`ns-1380.awsdns-44.org`
		A	2600:9000:5305:6400::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1380.awsdns-44.org`
		A	205.251.197.100^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1380.awsdns-44.org`
NS	`ns-1748.awsdns-26.co.uk`
		A	2600:9000:5306:d400::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1748.awsdns-26.co.uk`
		A	205.251.198.212^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1748.awsdns-26.co.uk`
NS	`ns-277.awsdns-34.com`
		A	2600:9000:5301:1500::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-277.awsdns-34.com`
		A	205.251.193.21^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-277.awsdns-34.com`
MX	`smtp.sparkpostmail.com` ⭐
		A	44.239.202.116^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-239-202-116.us-west-2.compute.amazonaws.com`
		A	52.13.182.7^{🇺🇸 Amazon52.12.0.0/15 EC2 PDX prefix}
			PTR	`ec2-52-13-182-7.us-west-2.compute.amazonaws.com`
		A	54.245.113.177^{🇺🇸 Amazon54.245.0.0/17 EC2 PDX prefix}
			PTR	`ec2-54-245-113-177.us-west-2.compute.amazonaws.com`
SOA	`ns-678.awsdns-20.net`awsdns-hostmaster@amazon.com serial=1

`masterclass.com`

DNSSEC	⚠️ Not signed
A	2606:4700::6811:b6d^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700::6811:c6d^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.17.11.109^{Cloudflare104.17.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.17.12.109^{Cloudflare104.17.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`elmo.ns.cloudflare.com` ⭐
NS	`lara.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
TXT	`00d5y000002tzbcuac`
TXT	`MS=ms40464053`
TXT	`ZOOM_verify_MPUyRtnpQ-KCjAo8dCLHtA`
TXT	`adobe-idp-site-verification=8cecf303de49e79f3bdba851120976cc135e573af7e141561...`
TXT	`airtable-verification=2e81434c48c7f1f5f14e32e768aac1f1`
TXT	`anthropic-domain-verification-09srn7=YDOqYXJCGJNNLdEfNFn4Bv2K6`
TXT	`apple-domain-verification=Dwh77ggSYSJLv0sV`
TXT	`atlassian-domain-verification=fsLNVMHXTinbduijD9qeWWVOBbtM0ktMigExcpz84eXkqnv...`
TXT	`atlassian-domain-verification=z8jowpBlkVJiTOqh0KMVPyRiJPZS62sQS/xQk08yGwdNQZ3...`
TXT	`cursor-domain-verification-gcpwkw=M0JNzcmFlXXDV3hxBDtgwzC8U`
TXT	`decagon-domain-verification-nc91pt=1RNcCaurtxoXZeWleNg62XUbb`
TXT	`docusign=6a55ec11-02b4-4add-89e3-635c4c845c02`
TXT	`dropbox-domain-verification=qzcecejb36yn`
TXT	`elevenlabs=uI1io7p5QnHLXBO4aIDSPbT1cilewVmgyBHbIv5yP3A`
TXT	`facebook-domain-verification=vko59lt5tiv3e15nlz3fz0ndzaa48k`
TXT	`figma-domain-verification=c03ba85be58bb787cf163df010d8a8f566914bdca30d4a8b4da...`
TXT	`gamma-domain-verification-5h4yh2=nNmT1WskPGUEevoEumWLfuiQQ`
TXT	`google-site-verification=82VH4G93yO_5Q3pQCMlhCigfy6YiJW9VB2BgLv1acNU`
TXT	`google-site-verification=HBtTedJJzGqpI0XzHnITC3kJW_kQizrx6qj-pJsBYpk`
TXT	`google-site-verification=UicQjDg7QYyoskEBnAx7DNiYZq2bNIovIdmTY8NEXkE`
TXT	`google-site-verification=ZLRIGV-xmlMAsluAM6Q0sXrYlH9i_lNOPure0L5-FRY`
TXT	`google-site-verification=eKv2UoTFDkYJ7Oj3zLj0cMpKYWTiIg90xNLRih9GFVQ`
TXT	`google-site-verification=iQxG-q_4dr0FA3Ao1DRrgLQjWqmL52fGQwUQxBEacQw`
TXT	`google-site-verification=n1Yz2XSiiz2Zq-fqb_3r0Vxu6nu4aJYocC-yApmymZo`
TXT	`h1-domain-verification=P8nffKmUSEtYWiazMh7ywjrjwYuWCV2BNT4twJXMhygtq8aq`
TXT	`jamf-site-verification=-EgzC23s3-FEy67wN_mmkA`
TXT	`jetbrains-domain-verification=cmohn0y9vdknqw3qaisdk6sn7`
TXT	`jumpdesktop=7ffc143dc6e1d1c8ce3cc46d41f514753764c58441fddc7e1745499243df`
TXT	`onetrust-domain-verification=402a912e5f60472faac5ae0be70f2ac0`
TXT	`openai-domain-verification=dv-GcY4FzLCwaYMyMTHJyhXx0F0`
TXT	`opus-clip-domain-verification-zemts8=ojPEL6WKEqGIE4oKs1MGcmXsq`
TXT	`pardot923373=eb51071010d88eac96762e419f98e03d8428bd9cbfc2748b1286e18b33fcf0b1`
TXT	`segment-site-verification=G8EClOzpb9DOxF39ihbSmVtb2j6hv5vz`
TXT	`segment-site-verification=uqDqIFigNS4vDmAD8EmAGhRsRpIVpvX4`
TXT	`serval-domain-verification-dgcjt0=dVNwJAK7PsxoQPKJ54kzoTO8Q`
TXT	`stripe-verification=05be685f2aa766fd02db629e200de6599f96a26ac878f011ca07f4e46...`
TXT	`stripe-verification=BAC58CD27A726CB57A22A94CF194159DC8AEC807D3C552A42D1965438...`
TXT	`stripe-verification=a724da2600b32898d16a622d440ffe5df365aede0ea0085dac363d14e...`
TXT	`stripe-verification=f4598fc28f5441e04a5f78cd69c1df5e2679418ccd8659c94a62348c0...`
TXT	`teamviewer-sso-verification=63cefa94ee3247beb570154f96dac6f4`
TXT	`v=spf1 ip4:198.245.81.0/24 ip4:136.147.176.0/24 ip4:13.111.0.0/16 ip4:136.147...`
TXT	`zapier-domain-verification-challenge=157c535c-55e3-47db-afae-588cd71db34b`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.17.11.109, 104.17.12.109
		IPv6 hints	2606:4700::6811:b6d, 2606:4700::6811:c6d
SOA	`elmo.ns.cloudflare.com`dns@cloudflare.com serial=2405883829

⚠️ On DNS blocklist: pro.plus, ultimate
WOT: SAFE (61/100)
rank #2643 globally
rank #1389 in the tld
WOT: SAFE (63/100)
📈 Tranco rank: #10,166

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DNS History

1 record (1 active, 0 former)

●CNAMEspgo.io2018-06-02 → 2026-06-04 · 2 obs

● 2018-06-02 05:51:02
● 2026-06-04 14:06:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
masterclass.com	lara.ns.cloudflare.com, elmo.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.163

NS records: lara.ns.cloudflare.com, elmo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for masterclass.com (unsigned zone)

⏱️ Timing

Total: 290ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`spgo.io`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

tracking.masterclass.com has three IP addresses: 35.160.36.78, 54.190.219.180 and 184.33.157.103.

Name Servers

Authority for tracking.masterclass.com is delegated across 4 name servers: ns-277.awsdns-34.com, ns-678.awsdns-20.net, ns-1380.awsdns-44.org and ns-1748.awsdns-26.co.uk.

The name servers of tracking.masterclass.com overlap at least partially with those of other domains — among them jannat365.live, cloudandhardware.com, pompesfunebres-rohfritsch-dettwiller.com and two more.

These name servers are often deployed together with the name servers ns-673.awsdns-20.net, ns-1246.awsdns-27.org, ns-1641.awsdns-13.co.uk and five others.

Each of the four hosts ns-277.awsdns-34.com, ns-678.awsdns-20.net, ns-1380.awsdns-44.org and ns-1748.awsdns-26.co.uk has two IP addresses. ns-277.awsdns-34.com points to 205.251.193.21 and 2600:9000:5301:1500::1. ns-678.awsdns-20.net points to 205.251.194.166 and 2600:9000:5302:a600::1. ns-1380.awsdns-44.org points to 205.251.197.100 and 2600:9000:5305:6400::1. ns-1748.awsdns-26.co.uk points to 205.251.198.212 and 2600:9000:5306:d400::1.

Mail Servers

The sole mail server for tracking.masterclass.com is smtp.sparkpostmail.com.

Among the domains sharing a mail server setup with tracking.masterclass.com are iphtml.biz, q.go.com, sparkpostmail4.com and two others.

There is at least a partial MX overlap between tracking.masterclass.com and other domains, including tradingpub.com, trackorder.site, cgtrader.com and two others.

These mail servers frequently co-occur with the mail servers aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

smtp.sparkpostmail.com maps to three IP addresses — 44.239.202.116, 52.13.182.7 and 54.245.113.177.