telnetlib error

[3lnyn0]

Hi! Please help, what is wrong with my code?
I don't know where is the problem. :(

import getpass
import telnetlib

HOST = 'routers'
user = input('Enter your username: ')
password = getpass.getpass()

#f = open('routers')

with open('routers') as f:
        for IP in f:
                print(IP)
                IP = IP.strip()
                print(IP)
                print('Configuring echipment with IP: ' + (IP))
                tn = telnetlib.Telnet(HOST)
                tn.read_until(b'Username: ')
                tn.write(user.encode('ascii') + b'\n')
                if password:
                        tn.read_until(b'Password: ')
                        tn.write(password.encode('ascii') + b'\n')

                tn.write(b'conf t \n')
                tn.write(b'int l1 \n')
        #tn.write(b'ip' + b'add' + b'1.1.1.1' + b'255.255.255.255')
        #tn.write('int l2\n')
        #tn.write(b'ip add 2.2.2.2 255.255.255.255\n')

print(tn.read_all().decode('ascii'))

Error:
Enter your username: admin
Password:
192.168.230.128

192.168.230.128
Configuring echipment with IP: 192.168.230.128
Traceback (most recent call last):
  File "ciscopython.py", line 16, in <module>
    tn = telnetlib.Telnet(HOST)
  File "/usr/lib/python3.8/telnetlib.py", line 218, in __init__
    self.open(host, port, timeout)
  File "/usr/lib/python3.8/telnetlib.py", line 235, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "/usr/lib/python3.8/socket.py", line 787, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

[3lnyn0]

I found the problem!