dns

TXT lookup example

Node.js

  1. const dns = require('dns')
  3. dns.resolve4('google.com', (err, ips) => {
  4.   if (err) {
  5.     console.error(err)
  6.   }
  8.   console.log(ips)
  9. })
  11. dns.resolveMx('google.com', (err, mx) => {
  12.   if (err) {
  13.     console.error(err)
  14.   }
  16.   console.log(mx)
  17. })
  19. dns.resolveTxt('google.com', (err, txt) => {
  20.   if (err) {
  21.     console.error(err)
  22.   }
  24.   console.log(txt)
  25. })

Output

  1. [ '172.217.11.78' ]
  2. [ { exchange: 'alt4.aspmx.l.google.com', priority: 50 },
  3.   { exchange: 'alt2.aspmx.l.google.com', priority: 30 },
  4.   { exchange: 'alt3.aspmx.l.google.com', priority: 40 },
  5.   { exchange: 'aspmx.l.google.com', priority: 10 },
  6.   { exchange: 'alt1.aspmx.l.google.com', priority: 20 } ]
  7. [ [ 'v=spf1 include:_spf.google.com ~all' ],
  8.   [ 'docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e' ],
  9.   [ 'facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95' ],
  10.   [ 'globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=' ] ]

Go

  1. package main
  3. import (
  4.     "fmt"
  5.     "net"
  6. )
  8. func main() {
  9.     ips, err := net.LookupIP("google.com")
  10.     if err != nil {
  11.         panic(err)
  12.     }
  14.     fmt.Println(ips)
  16.     mx, err := net.LookupMX("google.com")
  17.     if err != nil {
  18.         panic(err)
  19.     }
  21.     fmt.Println(mx)
  23.     txt, err := net.LookupTXT("google.com")
  24.     if err != nil {
  25.         panic(err)
  26.     }
  28.     fmt.Println(txt)
  29. }

Output

  1. [172.217.5.78 2607:f8b0:4007:80d::200e]
  2. [0xc0000ba2e0 0xc0000ba260 0xc0000ba2a0 0xc0000ba280 0xc0000ba300]
  3. [facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95 docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e v=spf1 include:_spf.google.com ~all globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=]