dns

dns

TXT lookup example

Node.js

const dns = require('dns')

dns.resolve4('google.com', (err, ips) => {
  if (err) {
    console.error(err)
  }

  console.log(ips)
})

dns.resolveMx('google.com', (err, mx) => {
  if (err) {
    console.error(err)
  }

  console.log(mx)
})

dns.resolveTxt('google.com', (err, txt) => {
  if (err) {
    console.error(err)
  }

  console.log(txt)
})

Output

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

Go

package main

import (
    "fmt"
    "net"
)

func main() {
    ips, err := net.LookupIP("google.com")
    if err != nil {
        panic(err)
    }

    fmt.Println(ips)

    mx, err := net.LookupMX("google.com")
    if err != nil {
        panic(err)
    }

    fmt.Println(mx)

    txt, err := net.LookupTXT("google.com")
    if err != nil {
        panic(err)
    }

    fmt.Println(txt)
}

Output

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