Query WHOIS information from IANA server

whois.py

import socket


def whois(cmd: str, whois_server="whois.iana.org", port=43):
    # Connect to the service host
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.connect((whois_server, port))
    # Send a single "command line", ending with <CRLF>.
    sock.send(cmd.encode("utf-8"))
    sock.send("\r\n".encode("utf-8"))
    # Receive information in response to the command line.
    msg = ""
    data = sock.recv(1024)
    while data:
        msg += data.decode("utf-8")
        data = sock.recv(1024)
    groups = []
    currGroup = {}
    for line in msg.splitlines():
        if line.startswith("%"):  # Skip comments
            continue
        if line == "":  # Blank line refers to start of new group
            if currGroup != {}:
                groups.append(currGroup)
            currGroup = {}
            continue
        kv = line.split(":", 1)  # Split line to key/value pair
        key = kv[0].lstrip()  # Remove leading spaces
        value = kv[1].lstrip()  # Remove leading spaces
        if key in currGroup:
            # If key already exists, join values by newline
            currGroup[key] = "\n".join([currGroup[key], value])
        else:
            currGroup[key] = value
    return groups


if __name__ == "__main__":
    import json

    s = whois("google.com")
    print(json.dumps(s, indent=4))

xoutput.json

[
    {
        "refer": "whois.verisign-grs.com"
    },
    {
        "domain": "COM"
    },
    {
        "organisation": "VeriSign Global Registry Services",
        "address": "12061 Bluemont Way\nReston Virginia 20190\nUnited States"
    },
    {
        "contact": "administrative",
        "name": "Registry Customer Service",
        "organisation": "VeriSign Global Registry Services",
        "address": "12061 Bluemont Way\nReston Virginia 20190\nUnited States",
        "phone": "+1 703 925-6999",
        "fax-no": "+1 703 948 3978",
        "e-mail": "info@verisign-grs.com"
    },
    {
        "contact": "technical",
        "name": "Registry Customer Service",
        "organisation": "VeriSign Global Registry Services",
        "address": "12061 Bluemont Way\nReston Virginia 20190\nUnited States",
        "phone": "+1 703 925-6999",
        "fax-no": "+1 703 948 3978",
        "e-mail": "info@verisign-grs.com"
    },
    {
        "nserver": "A.GTLD-SERVERS.NET 192.5.6.30 2001:503:a83e:0:0:0:2:30\nB.GTLD-SERVERS.NET 192.33.14.30 2001:503:231d:0:0:0:2:30\nC.GTLD-SERVERS.NET 192.26.92.30 2001:503:83eb:0:0:0:0:30\nD.GTLD-SERVERS.NET 192.31.80.30 2001:500:856e:0:0:0:0:30\nE.GTLD-SERVERS.NET 192.12.94.30 2001:502:1ca1:0:0:0:0:30\nF.GTLD-SERVERS.NET 192.35.51.30 2001:503:d414:0:0:0:0:30\nG.GTLD-SERVERS.NET 192.42.93.30 2001:503:eea3:0:0:0:0:30\nH.GTLD-SERVERS.NET 192.54.112.30 2001:502:8cc:0:0:0:0:30\nI.GTLD-SERVERS.NET 192.43.172.30 2001:503:39c1:0:0:0:0:30\nJ.GTLD-SERVERS.NET 192.48.79.30 2001:502:7094:0:0:0:0:30\nK.GTLD-SERVERS.NET 192.52.178.30 2001:503:d2d:0:0:0:0:30\nL.GTLD-SERVERS.NET 192.41.162.30 2001:500:d937:0:0:0:0:30\nM.GTLD-SERVERS.NET 192.55.83.30 2001:501:b1f9:0:0:0:0:30",
        "ds-rdata": "30909 8 2 E2D3C916F6DEEAC73294E8268FB5885044A833FC5459588F4A9184CFC41A5766"
    },
    {
        "whois": "whois.verisign-grs.com"
    },
    {
        "status": "ACTIVE",
        "remarks": "Registration information: http://www.verisigninc.com"
    },
    {
        "created": "1985-01-01",
        "changed": "2017-10-05",
        "source": "IANA"
    }
]