diff --git a/ctfr.py b/ctfr.py
index 36a2ea1..70fea2f 100644
--- a/ctfr.py
+++ b/ctfr.py
@@ -2,13 +2,14 @@
 # -*- coding: utf-8 -*-
 """
 ------------------------------------------------------------------------------
-	CTFR - 04.03.18.02.10.00 - Sheila A. Berta (UnaPibaGeek)
+        CTFR - 04.03.18.02.10.00 - Sheila A. Berta (UnaPibaGeek)
 ------------------------------------------------------------------------------
 """
 
 ## # LIBRARIES # ##
 import re
 import requests
+import socket  # Import the library to resolve IP addresses.
 
 ## # CONTEXT VARIABLES # ##
 version = 1.2
@@ -16,15 +17,15 @@
 ## # MAIN FUNCTIONS # ##
 
 def parse_args():
-	import argparse
-	parser = argparse.ArgumentParser()
-	parser.add_argument('-d', '--domain', type=str, required=True, help="Target domain.")
-	parser.add_argument('-o', '--output', type=str, help="Output file.")
-	return parser.parse_args()
+        import argparse
+        parser = argparse.ArgumentParser()
+        parser.add_argument('-d', '--domain', type=str, required=True, help="Target domain.")
+        parser.add_argument('-o', '--output', type=str, help="Output file.")
+        return parser.parse_args()
 
 def banner():
-	global version
-	b = '''
+        global version
+        b = '''
           ____ _____ _____ ____  
          / ___|_   _|  ___|  _ \ 
         | |     | | | |_  | |_) |
@@ -33,46 +34,64 @@ def banner():
 	
      Version {v} - Hey don't miss AXFR!
     Made by Sheila A. Berta (UnaPibaGeek)
-	'''.format(v=version)
-	print(b)
-	
+        '''.format(v=version)
+        print(b)
+
 def clear_url(target):
-	return re.sub('.*www\.','',target,1).split('/')[0].strip()
+        return re.sub('.*www\.','',target,1).split('/')[0].strip()
+
+def save_subdomains(subdomain, ip, output_file):
+        with open(output_file,"a") as f:
+                f.write(f"{subdomain} - {ip}\n")
+                f.close()
 
-def save_subdomains(subdomain,output_file):
-	with open(output_file,"a") as f:
-		f.write(subdomain + '\n')
-		f.close()
+def resolve_ip(subdomain):
+    try:
+        ip = socket.gethostbyname(subdomain)
+        return ip
+    except socket.error:
+        return "N/A"
 
 def main():
-	banner()
-	args = parse_args()
+    banner()
+    args = parse_args()
 
-	subdomains = []
-	target = clear_url(args.domain)
-	output = args.output
+    subdomains = []
+    target = clear_url(args.domain)
+    output = args.output
 
-	req = requests.get("https://crt.sh/?q=%.{d}&output=json".format(d=target))
+    try:
+        req = requests.get("https://crt.sh/?q=%.{d}&output=json".format(d=target))
 
-	if req.status_code != 200:
-		print("[X] Information not available!") 
-		exit(1)
+        req.raise_for_status()  # Throw an exception if the request was not successful.
 
-	for (key,value) in enumerate(req.json()):
-		subdomains.append(value['name_value'])
+        json_data = req.json()
 
-	
-	print("\n[!] ---- TARGET: {d} ---- [!] \n".format(d=target))
+        for (key, value) in enumerate(json_data):
+            subdomain = value['name_value']
+            ip = resolve_ip(subdomain)
+            subdomains.append((subdomain, ip))
 
-	subdomains = sorted(set(subdomains))
+        print("\n[!] ---- TARGET: {d} ---- [!] \n".format(d=target))
 
-	for subdomain in subdomains:
-		print("[-]  {s}".format(s=subdomain))
-		if output is not None:
-			save_subdomains(subdomain,output)
+        subdomains = sorted(set(subdomains))
 
-	print("\n\n[!]  Done. Have a nice day! ;).")
+        for subdomain, ip in subdomains:
+            print("[-]  {s} - {ip}".format(s=subdomain, ip=ip))
+            if output is not None:
+                save_subdomains(subdomain, ip, output)
 
+        print("\n\n[!]  Done. Have a nice day! ;).")
 
-main()
-	
+    except requests.exceptions.HTTPError as e:
+        print(f"[X] HTTP error occurred: {e}")
+    except requests.exceptions.RequestException as e:
+        print(f"[X] Request error occurred: {e}")
+    except requests.exceptions.JSONDecodeError as e:
+        print(f"[X] JSON decoding error occurred: {e}")
+        print("[X] Unable to parse JSON response. Please check the response manually.")
+        print("[X] Response content:")
+        print(req.text)
+
+if __name__ == "__main__":
+    main()