external.slack.com - dns.ninja

`external.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}
			PTR	`ec2-3-211-210-226.compute-1.amazonaws.com`
		A	44.206.9.87^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-206-9-87.compute-1.amazonaws.com`
		A	44.210.166.32^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
			PTR	`ec2-44-210-166-32.compute-1.amazonaws.com`
		A	54.164.173.191^{🇺🇸 Amazon54.164.0.0/15 EC2 IAD prefix}
			PTR	`ec2-54-164-173-191.compute-1.amazonaws.com`
		A	54.197.5.236^{🇺🇸 Amazon54.196.0.0/15 EC2 IAD 54.196.0.0/15}
			PTR	`ec2-54-197-5-236.compute-1.amazonaws.com`
TXT	`v=spf1 -all`

`slack.com`

	DNSSEC	🔒 Signed (DS record present)
	A	18.230.171.141^{🇧🇷 Amazon18.230.0.0/16 EC2 GRU prefix}
	A	54.94.183.148^{🇧🇷 Amazon54.94.128.0/18 EC2 GRU 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 #429 globally
rank #267 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: #346

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.

Same first word

Similar names

DNS History

61 records (16 active, 45 former)

●MXinbound-smtp.us-east-1.amazonaws.com2019-08-19 → 2026-08-09 · 3 obs

○ 2018-02-08 15:16:04
● 2019-08-19 12:21:40
● 2026-08-09 03:24:16

○MXmxa.mailgun.org2018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2019-08-19 12:21:40
○ 2026-08-09 03:24:16

○MXmxb.mailgun.org2018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2019-08-19 12:21:40
○ 2026-08-09 03:24:16

○A13.126.138.2012026-06-08 → 2026-06-08 · 4 obs

○ 2026-06-06 19:26:36
● 2026-06-08 03:55:30
○ 2026-06-08 05:01:42
○ 2026-08-09 03:24:16

○A13.127.99.682026-06-08 → 2026-06-08 · 4 obs

○ 2026-06-06 19:26:36
● 2026-06-08 03:55:30
○ 2026-06-08 05:01:42
○ 2026-08-09 03:24:16

○A13.33.14.482018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A13.33.150.1712018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A143.204.129.1632019-08-19 → 2019-08-19 · 4 obs

○ 2018-02-08 15:16:04
● 2019-08-19 12:21:40
○ 2021-11-02 11:38:20
○ 2026-08-09 03:24:16

○A18.134.215.412026-03-30 → 2026-08-06 · 8 obs

○ 2026-03-27 08:12:40
● 2026-03-30 04:05:16
○ 2026-04-01 02:24:48
● 2026-07-28 21:31:40
○ 2026-07-29 06:32:06
● 2026-08-06 12:27:16
○ 2026-08-07 04:00:40
○ 2026-08-09 03:24:16

○A18.159.197.2252026-03-15 → 2026-07-14 · 23 obs

○ 2021-11-02 11:38:20
● 2026-03-15 03:24:40
● 2026-03-17 05:20:44
○ 2026-03-19 05:41:54
○ 2026-03-23 18:22:48
● 2026-03-27 08:12:40
● 2026-04-02 07:23:20
○ 2026-04-06 11:05:10
● 2026-04-10 00:50:54
● 2026-04-13 07:50:36
○ 2026-04-16 18:02:00
● 2026-04-21 03:46:56
● 2026-05-19 23:36:54
○ 2026-05-20 03:45:24
○ 2026-06-13 05:47:56
● 2026-06-14 07:56:12
● 2026-06-20 14:57:38
○ 2026-06-25 03:05:46
● 2026-06-30 21:36:06
○ 2026-07-02 12:16:06
● 2026-07-14 16:24:22
○ 2026-07-14 17:04:22
○ 2026-08-09 03:24:16

○A18.168.172.2382026-03-30 → 2026-08-06 · 8 obs

○ 2026-03-27 08:12:40
● 2026-03-30 04:05:16
○ 2026-04-01 02:24:48
● 2026-07-28 21:31:40
○ 2026-07-29 06:32:06
● 2026-08-06 12:27:16
○ 2026-08-07 04:00:40
○ 2026-08-09 03:24:16

○A18.169.120.1912026-03-30 → 2026-08-06 · 8 obs

○ 2026-03-27 08:12:40
● 2026-03-30 04:05:16
○ 2026-04-01 02:24:48
● 2026-07-28 21:31:40
○ 2026-07-29 06:32:06
● 2026-08-06 12:27:16
○ 2026-08-07 04:00:40
○ 2026-08-09 03:24:16

○A18.169.61.1892026-03-30 → 2026-08-06 · 8 obs

○ 2026-03-27 08:12:40
● 2026-03-30 04:05:16
○ 2026-04-01 02:24:48
● 2026-07-28 21:31:40
○ 2026-07-29 06:32:06
● 2026-08-06 12:27:16
○ 2026-08-07 04:00:40
○ 2026-08-09 03:24:16

○A18.216.36.1902026-05-20 → 2026-07-02 · 23 obs

○ 2026-05-19 23:36:54
● 2026-05-20 03:45:24
○ 2026-05-23 04:54:56
● 2026-05-23 16:08:02
○ 2026-05-23 18:58:36
○ 2026-05-25 07:16:48
● 2026-05-25 17:56:56
○ 2026-05-27 14:52:48
● 2026-05-27 19:21:08
● 2026-05-29 03:32:08
○ 2026-05-29 15:15:30
● 2026-05-30 13:25:56
○ 2026-05-31 07:30:42
○ 2026-06-03 17:40:26
● 2026-06-04 09:38:38
○ 2026-06-05 14:55:00
● 2026-06-06 19:26:36
○ 2026-06-08 03:55:30
● 2026-06-08 09:24:10
○ 2026-06-08 17:00:52
● 2026-07-02 17:49:14
○ 2026-07-02 22:18:54
○ 2026-08-09 03:24:16

○A18.221.229.812026-05-20 → 2026-07-02 · 23 obs

○A18.230.171.1412026-04-26 → 2026-08-08 · 31 obs

○ 2026-04-21 03:46:56
● 2026-04-26 14:21:04
○ 2026-04-27 03:25:44
○ 2026-04-27 04:09:04
● 2026-04-27 13:13:40
○ 2026-04-28 03:32:44
○ 2026-06-08 09:24:10
● 2026-06-08 17:00:52
● 2026-06-13 05:47:56
○ 2026-06-14 07:56:12
○ 2026-06-17 14:03:26
● 2026-07-02 12:16:06
● 2026-07-02 22:18:54
○ 2026-07-10 19:05:50
● 2026-07-12 16:15:00
● 2026-07-15 12:49:22
○ 2026-07-17 20:30:44
● 2026-07-19 03:49:40
● 2026-07-22 07:03:32
○ 2026-07-27 17:14:08
● 2026-07-28 01:12:26
○ 2026-07-28 21:31:40
● 2026-08-01 00:08:32
○ 2026-08-01 17:31:28
● 2026-08-03 14:58:34
○ 2026-08-05 13:12:26
● 2026-08-05 14:55:52
○ 2026-08-06 12:27:16
● 2026-08-08 22:51:32
○ 2026-08-09 03:24:14
○ 2026-08-09 03:24:16

○A205.251.223.232018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A3.129.123.2352026-05-20 → 2026-07-02 · 23 obs

○A3.130.95.1822026-05-20 → 2026-07-02 · 23 obs

○A3.134.44.1342026-05-20 → 2026-07-02 · 23 obs

○A3.142.111.402026-05-20 → 2026-07-02 · 23 obs

○A3.143.19.652026-05-20 → 2026-07-02 · 23 obs

○A3.143.53.12026-05-20 → 2026-07-02 · 23 obs

●A3.210.88.62026-03-19 → 2026-08-09 · 27 obs

○ 2026-03-15 03:24:40
○ 2026-03-19 05:41:54
● 2026-03-19 18:19:28
○ 2026-03-20 12:34:12
○ 2026-04-02 07:23:20
● 2026-04-06 11:05:10
○ 2026-04-10 00:50:54
○ 2026-04-13 07:50:36
● 2026-04-16 18:02:00
○ 2026-04-21 03:46:56
○ 2026-06-20 14:57:38
● 2026-06-25 03:05:46
○ 2026-06-28 10:54:32
○ 2026-06-30 21:36:06
● 2026-07-10 20:13:10
○ 2026-07-12 16:15:00
○ 2026-07-21 22:00:40
● 2026-07-27 17:14:08
○ 2026-07-28 01:12:26
● 2026-07-29 06:32:06
○ 2026-07-29 22:42:24
● 2026-07-30 03:42:14
○ 2026-08-01 00:08:32
● 2026-08-07 04:00:40
○ 2026-08-08 22:51:32
● 2026-08-09 03:24:14
● 2026-08-09 03:24:16

○A3.22.139.1762026-05-20 → 2026-07-02 · 23 obs

○A3.68.124.1682026-03-15 → 2026-07-14 · 23 obs

○A3.68.124.952026-03-15 → 2026-07-14 · 23 obs

○A3.68.170.1532026-03-15 → 2026-07-14 · 23 obs

○A3.68.175.982026-03-15 → 2026-07-14 · 23 obs

●A3.95.117.962021-11-02 → 2026-08-09 · 29 obs

○ 2019-08-19 12:21:40
● 2021-11-02 11:38:20
○ 2026-03-15 03:24:40
○ 2026-03-19 05:41:54
● 2026-03-19 18:19:28
○ 2026-03-23 18:22:48
○ 2026-04-02 07:23:20
● 2026-04-06 11:05:10
○ 2026-04-10 00:50:54
○ 2026-04-13 07:50:36
● 2026-04-16 18:02:00
○ 2026-04-21 03:46:56
○ 2026-06-20 14:57:38
● 2026-06-25 03:05:46
○ 2026-06-28 10:54:32
○ 2026-06-30 21:36:06
● 2026-07-10 20:13:10
○ 2026-07-12 16:15:00
○ 2026-07-21 22:00:40
● 2026-07-27 17:14:08
○ 2026-07-28 01:12:26
● 2026-07-29 06:32:06
○ 2026-07-29 22:42:24
● 2026-07-30 03:42:14
○ 2026-08-01 00:08:32
● 2026-08-07 04:00:40
○ 2026-08-08 22:51:32
● 2026-08-09 03:24:14
● 2026-08-09 03:24:16

●A34.193.255.52021-11-02 → 2026-08-09 · 29 obs

●A34.196.46.2022026-03-19 → 2026-08-09 · 27 obs

●A34.202.253.62026-03-19 → 2026-08-09 · 27 obs

●A34.203.97.102021-11-02 → 2026-08-09 · 29 obs

●A34.204.109.2262021-11-02 → 2026-08-09 · 29 obs

●A34.205.195.662026-03-19 → 2026-08-09 · 27 obs

●A34.225.62.1852021-11-02 → 2026-08-09 · 29 obs

●A34.231.24.2242021-11-02 → 2026-08-09 · 29 obs

○A35.81.85.2512026-03-19 → 2026-08-05 · 22 obs

○ 2026-03-17 05:20:44
● 2026-03-19 05:41:54
○ 2026-03-19 18:19:28
● 2026-03-20 12:34:12
○ 2026-03-21 03:10:12
● 2026-03-21 23:18:44
○ 2026-03-22 05:57:42
● 2026-03-23 18:22:48
○ 2026-03-24 01:51:50
● 2026-07-10 19:05:50
○ 2026-07-10 20:13:10
● 2026-07-13 07:28:02
○ 2026-07-13 08:45:42
● 2026-07-21 22:00:40
○ 2026-07-22 07:03:32
● 2026-07-29 22:42:24
○ 2026-07-30 03:42:14
● 2026-08-01 17:31:28
○ 2026-08-03 14:58:34
● 2026-08-05 13:12:26
○ 2026-08-05 14:55:52
○ 2026-08-09 03:24:16

○A35.82.91.1932026-03-19 → 2026-08-05 · 22 obs

○A44.234.235.932026-03-19 → 2026-08-05 · 22 obs

○A44.237.180.1722026-03-19 → 2026-08-05 · 22 obs

○A52.29.238.2122026-03-15 → 2026-07-14 · 23 obs

●A52.73.140.592026-03-19 → 2026-08-09 · 27 obs

○A52.84.219.872018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A52.84.243.1932018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A52.85.196.1372018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A52.89.90.672026-03-19 → 2026-08-05 · 22 obs

●A54.147.59.1692021-11-02 → 2026-08-09 · 29 obs

●A54.163.235.1192021-11-02 → 2026-08-09 · 29 obs

○A54.188.33.222026-03-19 → 2026-08-05 · 22 obs

○A54.192.132.2422018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A54.192.202.182018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2019-08-19 12:21:40
○ 2026-08-09 03:24:16

●A54.225.153.2052026-03-19 → 2026-08-09 · 27 obs

○A54.230.195.2372018-02-08 → 2018-02-08 · 3 obs

● 2018-02-08 15:16:04
○ 2026-03-15 03:24:40
○ 2026-08-09 03:24:16

○A54.245.50.2452026-03-19 → 2026-08-05 · 22 obs

○A54.70.179.162026-03-19 → 2026-08-05 · 22 obs

○A54.71.95.1932026-03-19 → 2026-08-05 · 22 obs

●A54.92.199.1862021-11-02 → 2026-08-09 · 29 obs

○A54.94.183.1482026-04-26 → 2026-08-08 · 31 obs

○A65.2.117.882026-06-08 → 2026-06-08 · 4 obs

○ 2026-06-06 19:26:36
● 2026-06-08 03:55:30
○ 2026-06-08 05:01:42
○ 2026-08-09 03:24:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, g.gtld-servers.net, c.gtld-servers.net, j.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:205.251.194.94

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: 513ms | Queries: -

📄 Records

Type	Count	Sample Data
A	15	`34.202.253.6, 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

With 15 IP addresses in total, external.slack.com resolves to 3.95.117.96, 3.210.88.6, 34.193.255.5 and 12 other.

Among the host names that share IP numbers with external.slack.com are macnicatalk.slack.com, kycblck.slack.com, controlpanel.slack.com and two others.

Mail Servers

external.slack.com routes its mail through a single mail server, inbound-smtp.us-east-1.amazonaws.com.

external.slack.com has the same mail server arrangement as a number of other domains, for example gfn-uz.slack.com, sreoconsulting.slack.com, customer-service.awsapps.com and two more.

external.slack.com shares at least some of its mail servers with other domains — for example aofoundation.atlassian.net, verminexqatar.com, arjunah.atlassian.net and two more.

It is common to find these mail servers paired with the mail servers inbound-smtp.us-west-2.amazonaws.com.

inbound-smtp.us-east-1.amazonaws.com resolves to five IP numbers: 3.211.210.226, 44.206.9.87, 44.210.166.32 and two others.