DNS Lookup Tool
Query comprehensive DNS records for any domain. Get A, AAAA, MX, TXT, NS, CAA, SRV, DNSKEY and more.
DNS Records for 
slack.com
Records: 50
Response Time: 86ms
DNSSEC: Enabled
DNS Provider: 
AWS Route 53
AWS Route 53 Security:
✓ SPF strict
✓ DMARC reject
Address Records
IP addresses the domain points to
| Type | Name | Value | TTL |
|---|---|---|---|
| A | slack.com | 18.216.36.190 🇺🇸 US AS16509 AMAZON-02 - Amazon.com, Inc., US | 47s |
| A | slack.com | 3.134.44.134 🇺🇸 US AS16509 AMAZON-02 - Amazon.com, Inc., US | 47s |
| A | slack.com | 18.221.229.81 🇺🇸 US AS16509 AMAZON-02 - Amazon.com, Inc., US | 47s |
| A | slack.com | 3.129.123.235 🇺🇸 US AS16509 AMAZON-02 - Amazon.com, Inc., US | 47s |
| A | slack.com | 3.143.53.1 🇺🇸 US AS16509 AMAZON-02 - Amazon.com, Inc., US | 47s |
| A | slack.com | 3.143.19.65 | 47s |
| A | slack.com | 3.142.111.40 | 47s |
| A | slack.com | 3.22.139.176 | 47s |
| A | slack.com | 3.130.95.182 | 47s |
Mail Records
Mail servers for the domain
| Type | Name | Value | TTL |
|---|---|---|---|
| MX | slack.com | 1 aspmx.l.google.com. | 1m |
| MX | slack.com | 5 alt1.aspmx.l.google.com. | 1m |
| MX | slack.com | 5 alt2.aspmx.l.google.com. | 1m |
| MX | slack.com | 10 aspmx2.googlemail.com. | 1m |
| MX | slack.com | 10 aspmx3.googlemail.com. | 1m |
Name Records
Nameservers and aliases
| Type | Name | Value | TTL |
|---|---|---|---|
| NS | slack.com | ns-166.awsdns-20.com. | 49m |
| NS | slack.com | ns-606.awsdns-11.net. | 49m |
| NS | slack.com | ns-1493.awsdns-58.org. | 49m |
| NS | slack.com | ns-1901.awsdns-45.co.uk. | 49m |
| CNAME | _dmarc.slack.com | _dmarc.reject100.salesforce.com. | 5m |
| SOA | slack.com | ns-1493.awsdns-58.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300 | 15m |
Text & Verification
SPF, DKIM, DMARC, and verification
| Type | Name | Value | TTL |
|---|---|---|---|
| TXT | _dmarc.reject100.salesforce.com | "v=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:dmarc_agg@vali.email,mailto:0e5a5c34@inbox.ondmarc.com;ruf=mailto:0e5a5c34@inbox.ondmarc.com" | 1h |
| TXT | slack.com | "OSSRH-54733" | 1h |
| TXT | slack.com | "_0vidyxobp6x350odqhb4fo7fdxhmtq3" | 1h |
| TXT | slack.com | "spycloud-domain-verification=02e4c0be-cf43-44e4-beaf-4f99702ca632" | 1h |
| TXT | slack.com | "google-site-verification=2PK67oVPNyEtS1avSlr3PhH5nSiFuticbQv_bT4pM2k" | 1h |
| TXT | slack.com | "google-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mk" | 1h |
| TXT | slack.com | "google-site-verification=QvelFPjIOe3Vavw0q-aAVYaAPKmWCRjmmVVEAjgfjQc" | 1h |
| TXT | slack.com | "google-site-verification=efuXt5-oMr2CdNmVi6A9IO29KMKifpseD1qokxjWwcE" | 1h |
| TXT | slack.com | "google-site-verification=kB1KvgpSk9YkHsFmsj1VPI5YmDvfKctPxnplhGjyqtE" | 1h |
| TXT | slack.com | "google-site-verification=o2grd1TLmZZ8GrqbhVIFtzO2MRLTtSUpBBIBYfhQVCQ" | 1h |
| TXT | slack.com | "google-site-verification=v-LLB__IhraaI7ZzuE3jvRFIm2vERPLzWoepAEZJtKQ" | 1h |
| TXT | slack.com | "hubspot-developer-verification=OTE4NzYxYTgtMDUwZi00MzgzLTk2YTUtZDAwNjBlODg1MWM0" | 1h |
| TXT | slack.com | "v=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -all" | 1h |
Security & Certificates
DNSSEC, CA restrictions, and keys
| Type | Name | Value | TTL |
|---|---|---|---|
| CAA | slack.com | \# 39 00 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 68 6f 73 74 6d 61 73 74 65 72 40 73 6c 61 63 6b 2d 63 6f 72 70 2e 63 6f 6d | 5m |
| CAA | slack.com | \# 93 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 61 63 63 6f 75 6e 74 3d 34 35 35 62 31 35 65 64 32 37 32 62 65 64 30 39 37 37 32 35 63 36 65 61 35 30 65 38 39 39 32 31 66 63 35 37 33 37 39 63 35 33 33 38 61 32 39 33 30 35 63 30 35 37 37 31 64 66 36 35 66 66 66 31 | 5m |
| CAA | slack.com | \# 92 00 05 69 73 73 75 65 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67 3b 20 61 63 63 6f 75 6e 74 75 72 69 3d 68 74 74 70 73 3a 2f 2f 61 63 6d 65 2d 76 30 32 2e 61 70 69 2e 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67 2f 61 63 6d 65 2f 61 63 63 74 2f 31 35 33 32 31 33 34 39 30 36 | 5m |
| DNSKEY | slack.com | 256 3 ECDSAP256SHA256 hoSU9aUgr8ajimRcEUThcXw/w4c3DRRaTG330lx4GiFnBmZwlNsSgwjoYvnEeXypV6ClKaPmReE6P1petZg6nQ== | 56m |
| DNSKEY | slack.com | 256 3 ECDSAP256SHA256 uNi7klkjuIFas8kQ7Kz2EYSTTDDoc2b+BsgJqpyyJBZiwNIaKFFCI5PiJZPAPzULz2kk3u4aQqw6oBpeWHdotg== | 56m |
| DNSKEY | slack.com | 257 3 ECDSAP256SHA256 yEle+c4KxMSOtdzZSLZ5CPduOhcE/l2nrAguCwDCP8iZPEhF/HDaMX76iMBsA7PLNdGyOtw/i8IHH5QYfucdEw== | 56m |
| DS | slack.com | 296 ECDSAP256SHA256 2 601d7ec07e7dee6e1ab6a3e5b2da170f8353375fea63af2b732faa5a22898ea0 | 1d |
Queried at 5/12/2026, 8:53:58 AM
About DNS Records
The Domain Name System (DNS) is the internet's phonebook, translating human-readable domain names into IP addresses. DNS records contain essential configuration for how a domain behaves across email, web, security, and services.
Common Records
- A/AAAA - Map domain to IPv4/IPv6 addresses
- MX - Mail servers for receiving email
- TXT - SPF, DKIM, DMARC for email security
- NS - Authoritative nameservers
- CNAME - Aliases pointing to other domains
Security Records
- CAA - Restrict which CAs can issue certificates
- DNSKEY/DS - DNSSEC cryptographic keys
- TLSA - DANE TLS certificate authentication
- SSHFP - SSH host key fingerprints
- SRV - Service discovery and endpoints
REST API
Integrate DNS lookups into your applications with our REST API. Query all record types programmatically.
GET DNS Lookup
$
curl https://api.requestguard.com/v1/dns/lookup?domain=slack.com Response for slack.com Live Data
{
"success": true,
"data": {
"domain": "slack.com",
"queryTimeMs": 86,
"dnssec": true,
"dnsProvider": "AWS Route 53",
"records": [
{
"type": "46",
"name": "_dmarc.reject100.salesforce.com",
"value": "TXT ECDSAP256SHA256 4 3600 1782362473 1777176873 2317 salesforce.com. Qd0DGidNQ8p5l+GQWt7Dta09gi8Zw8OVkuqjHQR0M8eqDMnZ4irAVfyt4EFbGhM5JkOuXwIy0AzkwThnB10M1w==",
"ttl": 3600
},
{
"type": "46",
"name": "_dmarc.slack.com",
"value": "CNAME ECDSAP256SHA256 3 300 1778579938 1778572438 16979 slack.com. GKll5wfbwQGzL+Q5oPfbcGLHHGDWBWxQjJ1WFZwwKukykPwcfmMSAZEZSZwPLtHPwcTk1P+rMNN+DP5qlUzIew==",
"ttl": 300
},
{
"type": "46",
"name": "slack.com",
"value": "A ECDSAP256SHA256 2 60 1778579682 1778572422 16979 slack.com. 1THMQ2+frjaXPF8OS5MKnWYLH81ydf5cIWy0TtZA0SkuzccCxCOIs4ZxKUgyy6p6lC6uSHEkAHSAx5JE6PkT3g==",
"ttl": 47
},
{
"type": "46",
"name": "slack.com",
"value": "MX ECDSAP256SHA256 2 60 1778579698 1778572438 16979 slack.com. /b4TtmIfpLg5tdpVPujE3yjHMApQ4SnPq2yY/9APCIMfFvHr1Sx8+6LlJv5V6sZQrqKqm7JRPzopPyaYIt3/3A==",
"ttl": 60
},
{
"type": "46",
"name": "slack.com",
"value": "NS ECDSAP256SHA256 2 3600 1778582596 1778571796 16979 slack.com. rpGy4gMXBoMxzAHTWS+PF/PZDB9lHyfI8jxlxu+YiJhlgN1eIcB4LJZe/Trj2hwxHlhU00lP0GvJf0Kcr9Wh/g==",
"ttl": 2958
},
{
"type": "46",
"name": "slack.com",
"value": "SOA ECDSAP256SHA256 2 900 1778580538 1778572438 16979 slack.com. E7YYLYujgJb8JpJVpy4fIAX4SoS0C3u87yxzRLhYDz7IPAQMEZwz8+kSvAsCwZd/o68L5Kf/11B5R5hu2QLsug==",
"ttl": 900
},
{
"type": "46",
"name": "slack.com",
"value": "TXT ECDSAP256SHA256 2 3600 1778583238 1778572438 16979 slack.com. 4b3L9XXFmhoKw2ny7RM/tK5CB8tTwFk0hdE/2RF3UVJ4LYq2pDt3fYPntad34pHNTf1DP/iJvaLBLqTYqB9ATA==",
"ttl": 3600
},
{
"type": "46",
"name": "slack.com",
"value": "CAA ECDSAP256SHA256 2 300 1778579938 1778572438 16979 slack.com. eMaAOVoPeF8lEyA0VkM9dnMV5mNt37zJmvgSQiJdky5TPwxbWo4sypZdjwCOJckcGAw9Ub8VggTez7B6UH9Vhw==",
"ttl": 300
},
{
"type": "46",
"name": "slack.com",
"value": "DNSKEY ECDSAP256SHA256 2 3600 1778608800 1778569200 296 slack.com. Hwe3N/kfc7SrcgqJU4aDoCZv+5OZAK1MAICEckgreLQeHGG/hnJGOjPt2X5fCi0G8fGyJyO0diSBb1DBzltAvg==",
"ttl": 3389
},
{
"type": "46",
"name": "slack.com",
"value": "DS ECDSAP256SHA256 2 86400 1779070421 1778461421 27677 com. nSCCryC0esWX3H7lNrdzglv2p1OuYAz91ZrVODANhRTMeHiAG7Mm+a0HW2xqgvOGPGRUeG/IaVlMP3urkPzY0A==",
"ttl": 86400
},
{
"type": "A",
"name": "slack.com",
"value": "18.216.36.190",
"ttl": 47,
"geo": {
"ip": "18.216.36.190",
"asn": 16509,
"country": "US",
"asnName": "AMAZON-02 - Amazon.com, Inc., US"
}
},
{
"type": "A",
"name": "slack.com",
"value": "3.134.44.134",
"ttl": 47,
"geo": {
"ip": "3.134.44.134",
"asn": 16509,
"country": "US",
"asnName": "AMAZON-02 - Amazon.com, Inc., US"
}
},
{
"type": "A",
"name": "slack.com",
"value": "18.221.229.81",
"ttl": 47,
"geo": {
"ip": "18.221.229.81",
"asn": 16509,
"country": "US",
"asnName": "AMAZON-02 - Amazon.com, Inc., US"
}
},
{
"type": "A",
"name": "slack.com",
"value": "3.129.123.235",
"ttl": 47,
"geo": {
"ip": "3.129.123.235",
"asn": 16509,
"country": "US",
"asnName": "AMAZON-02 - Amazon.com, Inc., US"
}
},
{
"type": "A",
"name": "slack.com",
"value": "3.143.53.1",
"ttl": 47,
"geo": {
"ip": "3.143.53.1",
"asn": 16509,
"country": "US",
"asnName": "AMAZON-02 - Amazon.com, Inc., US"
}
},
{
"type": "A",
"name": "slack.com",
"value": "3.143.19.65",
"ttl": 47
},
{
"type": "A",
"name": "slack.com",
"value": "3.142.111.40",
"ttl": 47
},
{
"type": "A",
"name": "slack.com",
"value": "3.22.139.176",
"ttl": 47
},
{
"type": "A",
"name": "slack.com",
"value": "3.130.95.182",
"ttl": 47
},
{
"type": "MX",
"name": "slack.com",
"value": "1 aspmx.l.google.com.",
"ttl": 60
},
{
"type": "MX",
"name": "slack.com",
"value": "5 alt1.aspmx.l.google.com.",
"ttl": 60
},
{
"type": "MX",
"name": "slack.com",
"value": "5 alt2.aspmx.l.google.com.",
"ttl": 60
},
{
"type": "MX",
"name": "slack.com",
"value": "10 aspmx2.googlemail.com.",
"ttl": 60
},
{
"type": "MX",
"name": "slack.com",
"value": "10 aspmx3.googlemail.com.",
"ttl": 60
},
{
"type": "NS",
"name": "slack.com",
"value": "ns-166.awsdns-20.com.",
"ttl": 2958
},
{
"type": "NS",
"name": "slack.com",
"value": "ns-606.awsdns-11.net.",
"ttl": 2958
},
{
"type": "NS",
"name": "slack.com",
"value": "ns-1493.awsdns-58.org.",
"ttl": 2958
},
{
"type": "NS",
"name": "slack.com",
"value": "ns-1901.awsdns-45.co.uk.",
"ttl": 2958
},
{
"type": "CNAME",
"name": "_dmarc.slack.com",
"value": "_dmarc.reject100.salesforce.com.",
"ttl": 300
},
{
"type": "SOA",
"name": "slack.com",
"value": "ns-1493.awsdns-58.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300",
"ttl": 900
},
{
"type": "TXT",
"name": "_dmarc.reject100.salesforce.com",
"value": "\"v=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:dmarc_agg@vali.email,mailto:0e5a5c34@inbox.ondmarc.com;ruf=mailto:0e5a5c34@inbox.ondmarc.com\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"OSSRH-54733\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"_0vidyxobp6x350odqhb4fo7fdxhmtq3\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"spycloud-domain-verification=02e4c0be-cf43-44e4-beaf-4f99702ca632\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=2PK67oVPNyEtS1avSlr3PhH5nSiFuticbQv_bT4pM2k\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mk\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=QvelFPjIOe3Vavw0q-aAVYaAPKmWCRjmmVVEAjgfjQc\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=efuXt5-oMr2CdNmVi6A9IO29KMKifpseD1qokxjWwcE\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=kB1KvgpSk9YkHsFmsj1VPI5YmDvfKctPxnplhGjyqtE\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=o2grd1TLmZZ8GrqbhVIFtzO2MRLTtSUpBBIBYfhQVCQ\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"google-site-verification=v-LLB__IhraaI7ZzuE3jvRFIm2vERPLzWoepAEZJtKQ\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"hubspot-developer-verification=OTE4NzYxYTgtMDUwZi00MzgzLTk2YTUtZDAwNjBlODg1MWM0\"",
"ttl": 3600
},
{
"type": "TXT",
"name": "slack.com",
"value": "\"v=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -all\"",
"ttl": 3600
},
{
"type": "CAA",
"name": "slack.com",
"value": "\\# 39 00 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 68 6f 73 74 6d 61 73 74 65 72 40 73 6c 61 63 6b 2d 63 6f 72 70 2e 63 6f 6d",
"ttl": 300
},
{
"type": "CAA",
"name": "slack.com",
"value": "\\# 93 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 61 63 63 6f 75 6e 74 3d 34 35 35 62 31 35 65 64 32 37 32 62 65 64 30 39 37 37 32 35 63 36 65 61 35 30 65 38 39 39 32 31 66 63 35 37 33 37 39 63 35 33 33 38 61 32 39 33 30 35 63 30 35 37 37 31 64 66 36 35 66 66 66 31",
"ttl": 300
},
{
"type": "CAA",
"name": "slack.com",
"value": "\\# 92 00 05 69 73 73 75 65 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67 3b 20 61 63 63 6f 75 6e 74 75 72 69 3d 68 74 74 70 73 3a 2f 2f 61 63 6d 65 2d 76 30 32 2e 61 70 69 2e 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67 2f 61 63 6d 65 2f 61 63 63 74 2f 31 35 33 32 31 33 34 39 30 36",
"ttl": 300
},
{
"type": "DNSKEY",
"name": "slack.com",
"value": "256 3 ECDSAP256SHA256 hoSU9aUgr8ajimRcEUThcXw/w4c3DRRaTG330lx4GiFnBmZwlNsSgwjoYvnEeXypV6ClKaPmReE6P1petZg6nQ==",
"ttl": 3389
},
{
"type": "DNSKEY",
"name": "slack.com",
"value": "256 3 ECDSAP256SHA256 uNi7klkjuIFas8kQ7Kz2EYSTTDDoc2b+BsgJqpyyJBZiwNIaKFFCI5PiJZPAPzULz2kk3u4aQqw6oBpeWHdotg==",
"ttl": 3389
},
{
"type": "DNSKEY",
"name": "slack.com",
"value": "257 3 ECDSAP256SHA256 yEle+c4KxMSOtdzZSLZ5CPduOhcE/l2nrAguCwDCP8iZPEhF/HDaMX76iMBsA7PLNdGyOtw/i8IHH5QYfucdEw==",
"ttl": 3389
},
{
"type": "DS",
"name": "slack.com",
"value": "296 ECDSAP256SHA256 2 601d7ec07e7dee6e1ab6a3e5b2da170f8353375fea63af2b732faa5a22898ea0",
"ttl": 86400
}
],
"queriedAt": "2026-05-12T08:53:58.639Z"
}
}