diff --git a/dnsinformations.py b/dnschecker.py
similarity index 76%
rename from dnsinformations.py
rename to dnschecker.py
index 3f352e3..5902975 100644
--- a/dnsinformations.py
+++ b/dnschecker.py
@@ -7,11 +7,15 @@ import dns.name
 from config import DNS_QUERIES_TYPE
 
 
-class DNSInformations:
-    def __init__(self, api_key, fqdn):
+class DNSChecker:
+    def __init__(self, api_key, fqdn, rrtype=DNS_QUERIES_TYPE):
         self._fqdn = fqdn
+        self._rrtype = rrtype
 
     def checkDomainExist(self):
+        """
+        This function check if the domain exist
+        """
         try:
             res_query = dns.resolver.resolve(self._fqdn, 'NS')
         except dns.resolver.NoAnswer:
@@ -21,6 +25,10 @@ class DNSInformations:
         return True
 
     def whois(self):
+        """
+        This function will get an whois request for having some information
+        regarding the domain
+        """
         report = dict()
         w = whois.whois(self._fqdn)
         report['domain_name'] = w.domain_name
@@ -33,10 +41,13 @@ class DNSInformations:
         return report
 
     def resolver(self):
+        """
+        This function will resolv the FQDN with different type of RR
+        """
         report = dict()
 
-        for t in DNS_QUERIES_TYPE.keys():
-            report[t] = self._resolving(self._fqdn, t, DNS_QUERIES_TYPE[t])
+        for t in self._rrtype.keys():
+            report[t] = self._resolving(self._fqdn, t, self._rrtype[t])
         return report
 
     def _resolving(self, fqdn, t, attr):
diff --git a/main.py b/main.py
index dd2ad74..93ce930 100644
--- a/main.py
+++ b/main.py
@@ -4,7 +4,7 @@
 from argparse import ArgumentParser
 from config import VT_ATTRIBUTES_MAPPING
 from vt import VT
-from dnsinformations import DNSInformations as DNS
+from dnschecker import DNSChecker as DNS
 import ipaddress
 from datetime import datetime
 from hashing import Hash
@@ -108,7 +108,7 @@ def main():
         if args.domain:
             _parsingDomain(config, args.domain, report)
         if args.host:
-            pass
+            _parsingHost(config, args.host, report)
         if args.ip:
             _parsingIP(config, args.ip, report)
     # Analyse hash file
@@ -210,6 +210,19 @@ def _parsingIP(config, ip, report):
             except KeyError:
                 print(f"Cannot find the key {vt}")
 
+def _parsingHost(config, fqdn, report):
+    vt = VT(config['api_key_vt'])
+    dns = DNS(config['api_key_vt'], fqdn, {'A': 'address'})
+
+    # Resolv and print results
+    report['resolving'] = dns.resolver()
+    _printDNSResolving(report['resolving'])
+    
+    # Print VirusTotal
+    report['vt'] = dict()
+    vt.getDomainReport(fqdn, report['vt'])
+    _printDNSVirusTotal(report['vt'])
+
 def _parsingDomain(config, fqdn, report):
     vt = VT(config['api_key_vt'])
     dns = DNS(config['api_key_vt'], fqdn)
@@ -219,41 +232,50 @@ def _parsingDomain(config, fqdn, report):
         print(f"The domain {fqdn} do not exist")
         return
 
+    # Resolving domain
+    report['resolving'] = dns.resolver()
+    _printDNSResolving(report['resolving'])
+
+    # Whois request and print the result
+    report['whois'] = dns.whois()
+    _printDNSWhois(report['whois'])
+
+    # Print VirusTotal
+    report['vt'] = dict()
+    vt.getDomainReport(fqdn, report['vt'])
+    _printDNSVirusTotal(report['vt'])
+
+def _printDNSResolving(report):
     print("----------------------")
     print("|     resolving      |")
     print("----------------------")
-    report['resolving'] = dns.resolver()
-    for key in report['resolving'].keys():
+    for key in report.keys():
         print(f"{key}: ")
-        for entry in report['resolving'][key]:
+        for entry in report[key]:
             for subkey in entry.keys():
                 value = entry[subkey]
                 if isinstance(value, bytes):
                     value = value.decode()
                 print(f"\t{subkey}: {value}")
 
-    print("\n----------------------")
-    print("|        whois       |")
-    print("----------------------")
-    report['whois'] = dns.whois()
-    report_whois = report['whois']
-    for key in report_whois.keys():
-        if isinstance(report_whois[key], list):
-            print(f"{key}:")
-            for value in report_whois[key]:
-                print(f"\t{value}")
-        else:
-            print(f"{key}: {report_whois[key]}")
-
+def _printDNSVirusTotal(report):
     print("\n----------------------")
     print("|     VirusTotal     |")
     print("----------------------")
-    report['vt'] = dict()
-    vt.getDomainReport(fqdn, report['vt'])
-    report_vt = report['vt']
-    for key in report_vt:
-        print(f"{key}: {report_vt[key]}")
+    for key in report:
+        print(f"{key}: {report[key]}")
 
+def _printDNSWhois(report):
+    print("\n----------------------")
+    print("|        whois       |")
+    print("----------------------")
+    for key in report.keys():
+        if isinstance(report[key], list):
+            print(f"{key}:")
+            for value in report[key]:
+                print(f"\t{value}")
+        else:
+            print(f"{key}: {report[key]}")
 
 if __name__ == "__main__":
     main()
diff --git a/vt.py b/vt.py
index 702a72f..8ebdd36 100644
--- a/vt.py
+++ b/vt.py
@@ -13,6 +13,9 @@ class VT:
         }
 
     def getIPVirusTotal(self, ip):
+        """
+        This function get IP information from VirusTotal
+        """
         res = requests.get(
             f"{self._url}/ip_addresses/{ip}",
             headers=self._headers
@@ -38,6 +41,9 @@ class VT:
         return data
 
     def getDomainReport(self, fqdn, report):
+        """
+        This function get the report for the specific domain 
+        """
         res = requests.get(
             f"{self._url}/domains/{fqdn}",
             headers=self._headers
@@ -65,6 +71,9 @@ class VT:
                 report['malicious'] += 1
 
     def getRateFromHash(self, h, report):
+        """
+        This function get the report of the hash specified by the parameter h
+        """
         headers = self._headers
 
         res = requests.get(