pair-programming-br.slack.com - dns.ninja

`pair-programming-br.slack.com`

DNSSEC	⚠️ Not signed
A	18.230.171.141^{🇧🇷 Amazon18.230.0.0/16 EC2 GRU prefix}
		PTR	`ec2-18-230-171-141.sa-east-1.compute.amazonaws.com`
A	54.94.183.148^{🇧🇷 Amazon54.94.128.0/18 EC2 GRU 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	⚠️ Not signed
	A	3.22.139.176^{🇺🇸 Amazon3.20.0.0/14 EC2 CMH prefix}
	A	3.129.123.235^{🇺🇸 Amazon3.128.0.0/15 EC2 CMH prefix}
	A	3.130.95.182^{🇺🇸 Amazon3.130.0.0/16 EC2 CMH prefix}
	A	3.134.44.134^{🇺🇸 Amazon3.132.0.0/14 EC2 CMH prefix}
	A	3.142.111.40^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
	A	3.143.19.65^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
	A	3.143.53.1^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
	A	18.216.36.190^{🇺🇸 Amazon18.216.0.0/14 EC2 CMH prefix}
	A	18.221.229.81^{🇺🇸 Amazon18.220.0.0/14 EC2 CMH 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 #420 globally
rank #265 in the tld
Semrush Rank:#1,593 Keywords:239,092 Traffic:1,677,936/mo
WOT: SAFE (93/100)
📈 Tranco rank: #329

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.

DNS History

27 records (3 active, 24 former)

●MXinbound-smtp.us-east-1.amazonaws.com2026-03-10 → 2026-06-04 · 3 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
● 2026-06-04 08:19:16

○MXmxa.mailgun.org2017-03-09 → 2017-03-09 · 3 obs

● 2017-03-09 21:39:34
○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○MXmxb.mailgun.org2017-03-09 → 2017-03-09 · 3 obs

● 2017-03-09 21:39:34
○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A18.159.197.2252026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

●A18.230.171.1412026-05-08 → 2026-06-04 · 6 obs

○ 2026-03-10 11:12:52
● 2026-05-08 13:40:38
○ 2026-05-09 09:30:24
○ 2026-05-18 05:24:18
● 2026-06-04 08:19:14
● 2026-06-04 08:19:16

○A3.210.88.62026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A3.68.124.1682026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

○A3.68.124.952026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

○A3.68.170.1532026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

○A3.68.175.982026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

○A3.95.117.962026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.193.255.52026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.196.46.2022026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.202.253.62026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.203.97.102026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.204.109.2262026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.205.195.662026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.225.62.1852026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A34.231.24.2242026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A52.29.238.2122026-03-10 → 2026-05-18 · 7 obs

○ 2017-03-09 21:39:34
● 2026-03-10 11:12:52
○ 2026-05-08 13:40:38
● 2026-05-09 09:30:24
● 2026-05-18 05:24:18
○ 2026-06-04 08:19:14
○ 2026-06-04 08:19:16

○A52.73.140.592026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A54.147.59.1692026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A54.163.235.1192026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A54.225.153.2052026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A54.230.143.1912017-03-09 → 2017-03-09 · 3 obs

● 2017-03-09 21:39:34
○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

○A54.92.199.1862026-03-10 → 2026-06-04 · 2 obs

○ 2026-03-10 11:12:52
○ 2026-06-04 08:19:16

●A54.94.183.1482026-05-08 → 2026-06-04 · 6 obs

○ 2026-03-10 11:12:52
● 2026-05-08 13:40:38
○ 2026-05-09 09:30:24
○ 2026-05-18 05:24:18
● 2026-06-04 08:19:14
● 2026-06-04 08:19:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
slack.com	ns-166.awsdns-20.com, ns-606.awsdns-11.net, ns-1901.awsdns-45.co.uk, ns-1493.awsdns-58.org	-

✅ Authoritative Response

Server:205.251.192.166

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

⚠️ Insecure (no DNSSEC)

No DS record for slack.com (unsigned zone)

⏱️ Timing

Total: 124ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`18.230.171.141, 54.94.183.148`
MX	1	`inbound-smtp.us-east-1.amazonaws.com (pr`
TXT	1	`v=spf1 -all`

Analysis

IP Addresses

pair-programming-br.slack.com points to two IP numbers: 18.230.171.141 and 54.94.183.148.

Two other host names, along with ibm-container-service.slack.com, pacificmetrics.slack.com and dena-mtg-duelist.slack.com, also share IP numbers with pair-programming-br.slack.com.

Mail Servers

The sole mail server for pair-programming-br.slack.com is inbound-smtp.us-east-1.amazonaws.com.

Among the domains sharing a mail server setup with pair-programming-br.slack.com are fargostandard.com, slack-www-dev-loadtest-09fff2590ea46f63c.slack.com, protickets.com and two others.

There is at least a partial MX overlap between pair-programming-br.slack.com and other domains, including faro01.atlassian.net, firstcourseinjava.atlassian.net, hackerrank.atlassian.net and two others.

These mail servers often co-occur with the mail servers inbound-smtp.us-west-2.amazonaws.com.

inbound-smtp.us-east-1.amazonaws.com maps to 5 IP numbers, specifically 3.211.210.226, 44.206.9.87, 44.210.166.32 along with two more not listed here.