Domain, IP & ASN lookup.

{
    "rdapConformance": [
        "nro_rdap_profile_0",
        "cidr0",
        "rdap_level_0"
    ],
    "notices": [
        {
            "title": "Source",
            "description": [
                "Objects returned came from source",
                "TWNIC"
            ]
        },
        {
            "title": "Terms and Conditions",
            "description": [
                "This is the APNIC WHOIS Database query service. The objects are in RDAP format.",
                "This information has been partially mirrored by APNIC from TWNIC. To obtain more specific information, please use the TWNIC whois server at whois.twnic.net."
            ],
            "links": [
                {
                    "value": "https://twnic.rdap.apnic.net/ip/203.72.158.0/24",
                    "rel": "terms-of-service",
                    "href": "http://www.apnic.net/db/dbcopyright.html",
                    "type": "text/html"
                }
            ]
        },
        {
            "title": "Whois Inaccuracy Reporting",
            "description": [
                "If you see inaccuracies in the results, please visit: "
            ],
            "links": [
                {
                    "value": "https://twnic.rdap.apnic.net/ip/203.72.158.0/24",
                    "rel": "inaccuracy-report",
                    "href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
                    "type": "text/html"
                }
            ]
        }
    ],
    "country": "TW",
    "name": "T-INHS.TC.EDU.TW-NET",
    "status": [
        "active"
    ],
    "links": [
        {
            "value": "https://twnic.rdap.apnic.net/ip/203.72.158.0/24",
            "rel": "self",
            "href": "https://twnic.rdap.apnic.net/ip/203.72.158.0/24",
            "type": "application/rdap+json"
        }
    ],
    "remarks": [
        {
            "description": [
                "I-NING HIGH SCHOOL",
                "45, SEC 2, FU HSIN RD.,",
                "TAICHUNG Taiwan"
            ],
            "title": "description"
        },
        {
            "description": [
                "This information has been partially mirrored by APNIC from",
                "TWNIC. To obtain more specific information, please use the",
                "TWNIC whois server at whois.twnic.net."
            ],
            "title": "remarks"
        }
    ],
    "entities": [
        {
            "roles": [
                "technical",
                "administrative"
            ],
            "links": [
                {
                    "value": "https://twnic.rdap.apnic.net/ip/203.72.158.0/24",
                    "rel": "self",
                    "href": "https://twnic.rdap.apnic.net/entity/CSL8-TW",
                    "type": "application/rdap+json"
                }
            ],
            "remarks": [
                {
                    "description": [
                        "This information has been partially mirrored by APNIC from",
                        "TWNIC. To obtain more specific information, please use the",
                        "TWNIC whois server at whois.twnic.net."
                    ],
                    "title": "remarks"
                }
            ],
            "handle": "CSL8-TW",
            "objectClassName": "entity",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "CHUEN-SHIUH LAI"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "individual"
                    ],
                    [
                        "adr",
                        {
                            "label": "I-NING HIGH SCHOOL\n45, SEC 2, FU HSIN RD.,\nTAICHUNG Taiwan"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ],
                    [
                        "tel",
                        {
                            "type": "voice"
                        },
                        "text",
                        "+886-4-261-3411 ext 225"
                    ],
                    [
                        "tel",
                        {
                            "type": "fax"
                        },
                        "text",
                        "+886-4-261-2741"
                    ],
                    [
                        "email",
                        [],
                        "text",
                        "tcsl3@mailinhs.tc.edu.tw"
                    ]
                ]
            ]
        }
    ],
    "handle": "203.72.158.0 - 203.72.158.255",
    "type": "ASSIGNED NON-PORTABLE",
    "startAddress": "203.72.158.0",
    "endAddress": "203.72.158.255",
    "objectClassName": "ip network",
    "ipVersion": "v4",
    "cidr0_cidrs": [
        {
            "v4prefix": "203.72.158.0",
            "length": 24
        }
    ],
    "port43": "whois.apnic.net"
}