mails.slack.com - dns.ninja

`mails.slack.com`

DNSSEC	⚠️ Not signed
A	3.95.117.96^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
		PTR	`ec2-3-95-117-96.compute-1.amazonaws.com`
A	3.210.88.6^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
A	34.193.255.5^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.196.46.202^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.202.253.6^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.203.97.10^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.204.109.226^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.205.195.66^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
A	34.225.62.185^{🇺🇸 Amazon34.224.0.0/12 EC2 Region prefix}
A	34.231.24.224^{🇺🇸 Amazon34.224.0.0/12 EC2 Region prefix}
A	52.73.140.59^{🇺🇸 Amazon52.72.0.0/15 EC2 IAD prefix}
A	54.92.199.186^{🇺🇸 Amazon54.92.128.0/17 EC2 IAD prefix}
A	54.147.59.169^{🇺🇸 Amazon54.144.0.0/14 EC2 IAD NAT prefix}
A	54.163.235.119^{🇺🇸 Amazon54.160.0.0/14 EC2 IAD prefix}
A	54.225.153.205^{🇺🇸 Amazon54.224.0.0/15 EC2 IAD prefix}
MX	`inbound-smtp.us-east-1.amazonaws.com` ⭐
		A	3.211.210.226^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
		A	44.206.9.87^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
		A	44.210.166.32^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
		A	54.164.173.191^{🇺🇸 Amazon54.164.0.0/15 EC2 IAD prefix}
		A	54.197.5.236^{🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15}
TXT	`v=spf1 -all`

`slack.com`

	DNSSEC	🔒 Signed (DS record present)
	A	3.95.117.96^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
	A	3.210.88.6^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
	A	34.193.255.5^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.196.46.202^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.202.253.6^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.203.97.10^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.204.109.226^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.205.195.66^{🇺🇸 Amazon34.192.0.0/12 EC2 IAD prefix}
	A	34.225.62.185^{🇺🇸 Amazon34.224.0.0/12 EC2 Region prefix}
	A	34.231.24.224^{🇺🇸 Amazon34.224.0.0/12 EC2 Region prefix}
	A	52.73.140.59^{🇺🇸 Amazon52.72.0.0/15 EC2 IAD prefix}
	A	54.92.199.186^{🇺🇸 Amazon54.92.128.0/17 EC2 IAD prefix}
	A	54.147.59.169^{🇺🇸 Amazon54.144.0.0/14 EC2 IAD NAT prefix}
	A	54.163.235.119^{🇺🇸 Amazon54.160.0.0/14 EC2 IAD prefix}
	A	54.225.153.205^{🇺🇸 Amazon54.224.0.0/15 EC2 IAD prefix}
	NS	`ns-1493.awsdns-58.org` ⭐
	NS	`ns-166.awsdns-20.com`
	NS	`ns-1901.awsdns-45.co.uk`
	NS	`ns-606.awsdns-11.net`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`aspmx2.googlemail.com`⁽¹⁰⁾
	MX	`aspmx3.googlemail.com`⁽¹⁰⁾
	TXT	`OSSRH-54733`
	TXT	`_0vidyxobp6x350odqhb4fo7fdxhmtq3`
	TXT	`google-site-verification=2PK67oVPNyEtS1avSlr3PhH5nSiFuticbQv_bT4pM2k`
	TXT	`google-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mk`
	TXT	`google-site-verification=QvelFPjIOe3Vavw0q-aAVYaAPKmWCRjmmVVEAjgfjQc`
	TXT	`google-site-verification=efuXt5-oMr2CdNmVi6A9IO29KMKifpseD1qokxjWwcE`
	TXT	`google-site-verification=kB1KvgpSk9YkHsFmsj1VPI5YmDvfKctPxnplhGjyqtE`
	TXT	`google-site-verification=o2grd1TLmZZ8GrqbhVIFtzO2MRLTtSUpBBIBYfhQVCQ`
	TXT	`google-site-verification=v-LLB__IhraaI7ZzuE3jvRFIm2vERPLzWoepAEZJtKQ`
	TXT	`hubspot-developer-verification=OTE4NzYxYTgtMDUwZi00MzgzLTk2YTUtZDAwNjBlODg1MWM0`
	TXT	`spycloud-domain-verification=02e4c0be-cf43-44e4-beaf-4f99702ca632`
	TXT	`v=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra....`
	SOA	`ns-1493.awsdns-58.org`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (93/100)
rank #425 globally
rank #265 in the tld

slack.com

Slack.com is the main website for Slack, a cloud‑based team messaging and collaboration platform operated by Slack Technologies, now part of Salesforce.

Key facts

Owner / operator: Slack Technologies (a subsidiary of Salesforce)
TLD:.com— gTLD
Primary purpose: team collaboration and messaging platform
Status: active

History

Year	Event
2013	Public beta of Slack launched
2020	Salesforce announced acquisition of Slack
2021	Acquisition completed; Slack became part of Salesforce

Semrush Rank:#1,593 Keywords:239,092 Traffic:1,677,936/mo
WOT: SAFE (93/100)
📈 Tranco rank: #338

Slack is a business communication platform founded in 2013 and acquired by Salesforce in 2021 for $27.7 billion. With over 18 million daily active users, Slack has become essential collaboration infrastructure for businesses, replacing email for many internal communications.

Slack offers real-time messaging, channels for organized discussions, file sharing, integrations with thousands of apps, and Slack Huddles for quick audio conversations. The platform pioneered many features now standard in business chat tools.

Slack's infrastructure handles millions of concurrent connections with strict real-time requirements. The platform processes billions of messages daily, with significant infrastructure for search and file storage.

DNS for slack.com uses Amazon Route 53 with global distribution. The platform's enterprise customers require high availability and security.

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DNS History

27 records (16 active, 11 former)

●MXinbound-smtp.us-east-1.amazonaws.com2026-06-02 → 2026-06-28 · 2 obs

● 2026-06-02 00:11:20
● 2026-06-28 21:17:02

○A18.216.36.1902026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A18.221.229.812026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A18.230.171.1412026-06-02 → 2026-06-11 · 5 obs

● 2026-06-02 00:11:20
○ 2026-06-04 09:38:38
● 2026-06-11 01:48:10
○ 2026-06-24 02:59:58
○ 2026-06-28 21:17:02

○A3.129.123.2352026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A3.130.95.1822026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A3.134.44.1342026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A3.142.111.402026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A3.143.19.652026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

○A3.143.53.12026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

●A3.210.88.62026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

○A3.22.139.1762026-06-04 → 2026-06-04 · 4 obs

○ 2026-06-02 00:11:20
● 2026-06-04 09:38:38
○ 2026-06-11 01:48:10
○ 2026-06-28 21:17:02

●A3.95.117.962026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.193.255.52026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.196.46.2022026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.202.253.62026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.203.97.102026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.204.109.2262026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.205.195.662026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.225.62.1852026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A34.231.24.2242026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A52.73.140.592026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A54.147.59.1692026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A54.163.235.1192026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A54.225.153.2052026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

●A54.92.199.1862026-06-24 → 2026-06-28 · 3 obs

○ 2026-06-11 01:48:10
● 2026-06-24 02:59:58
● 2026-06-28 21:17:02

○A54.94.183.1482026-06-02 → 2026-06-11 · 5 obs

● 2026-06-02 00:11:20
○ 2026-06-04 09:38:38
● 2026-06-11 01:48:10
○ 2026-06-24 02:59:58
○ 2026-06-28 21:17:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, g.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net...	-
slack.com	ns-166.awsdns-20.com, ns-606.awsdns-11.net, ns-1901.awsdns-45.co.uk, ns-1493.awsdns-58.org	2 records

✅ Authoritative Response

Server:205.251.197.213

NS records: ns-166.awsdns-20.com, ns-606.awsdns-11.net, ns-1901.awsdns-45.co.uk, ns-1493.awsdns-58.org

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1869ms | Queries: -

📄 Records

Type	Count	Sample Data
A	15	`34.231.24.224, 34.205.195.66...`
MX	1	`inbound-smtp.us-east-1.amazonaws.com (pr`
TXT	1	`v=spf1 -all`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-166.awsdns-20.com, ns-166.awsdns-20.com)

Analysis

IP Addresses

mails.slack.com points to 15 IP addresses, including 3.95.117.96, 3.210.88.6 and 34.193.255.5, plus 12 other.

newflyer-its.slack.com, styrelsenksk.slack.com, flutterwavedevelopers.slack.com plus two other host names have IP numbers in common with mails.slack.com.

Mail Servers

mails.slack.com uses one mail server — inbound-smtp.us-east-1.amazonaws.com.

The mail server setup of mails.slack.com matches that of other domains such as oprah.com, ourrevcambridge.slack.com, buc-ees.slack.com and two others.

At least some of the mail servers used by mails.slack.com are shared with other domains: answermail.sapbydesign.com, cems.xyz, swapfiestrebuild.atlassian.net and two others among them.

These mail servers tend to be used in conjunction with the mail servers inbound-smtp.us-west-2.amazonaws.com.

inbound-smtp.us-east-1.amazonaws.com has five IP addresses: 3.211.210.226, 44.206.9.87, 44.210.166.32 plus two others.