mx.stumbleupon.com - dns.ninja

`stumbleupon.com`

	DNSSEC	⚠️ Not signed
	A	18.235.175.145^{🇺🇸 Amazon18.232.0.0/14 EC2 IAD prefix}
	A	52.5.218.87^{🇺🇸 Amazon52.4.0.0/14 EC2 IAD prefix}
	A	54.235.122.59^{🇺🇸 Amazon54.234.0.0/15 EC2 IAD prefix}
	NS	`ns-521.awsdns-01.net` ⭐
	NS	`ns-1116.awsdns-11.org`
	NS	`ns-1950.awsdns-51.co.uk`
	NS	`ns-358.awsdns-44.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	`v=spf1 include:_spf.google.com ~all`
	SOA	`ns-521.awsdns-01.net`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (95/100)
rank #687 globally
rank #404 in the tld

stumbleupon.com

StumbleUpon was a discovery and recommendation web service that let users "stumble" upon random web pages curated according to their interests. It was shut down by its operator in 2018, and the domain now serves as a legacy identifier for the defunct brand.

Key facts

Owner / operator: StumbleUpon, Inc. (service discontinued; domain ownership post-shutdown unclear)
TLD:.com— gTLD
Primary purpose: formerly a content discovery / recommendation platform; now inactive
Status: legacy — service discontinued, domain largely dormant or redirecting

History

Year	Event
2002	StumbleUpon founded
2009	eBay sold StumbleUpon back to its founders after earlier acquiring it
2018	Service shut down; founders launched Mix as a successor

Related domains

mix.com— successor discovery service launched by former StumbleUpon founders

WOT: SAFE (94/100)
📈 Tranco rank: #2,707

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🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
stumbleupon.com	ns-521.awsdns-01.net, ns-358.awsdns-44.com, ns-1116.awsdns-11.org, ns-1950.awsdns-51.co.uk	2 records

✅ Authoritative Response

Server:205.251.193.102

NS records: ns-521.awsdns-01.net, ns-358.awsdns-44.com, ns-1116.awsdns-11.org, ns-1950.awsdns-51.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stumbleupon.com (unsigned zone)

⏱️ Timing

Total: 168ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-358.awsdns-44.com, ns-358.awsdns-44.com)