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IPV4

72.57.28.0/24

Record found
Retrieved · 28 Sep 2026, 14:19 UTC1 sourceView JSON
Click a domain or IP to look it up.
01

Registry record

RDAPhttps://rdap.arin.net/registry/ip/72.57.28.0/24
Record found
Record ID
NET-72-57-0-0-1
Network name
BIIOL
Address range
72.57.0.0 — 72.57.31.255
CIDR blocks
72.57.0.0/19
Network type
DIRECT ALLOCATION
Parent network
NET-72-0-0-0-0
Last changed
2026-02-24T12:34:19-05:00
Registered
2025-07-30T07:10:12-04:00
Status
active
Notices & terms 4

Terms of Service

By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use https://www.arin.net/resources/registry/whois/tou/

Whois Inaccuracy Reporting

If you see inaccuracies in the results, please visit: https://www.arin.net/resources/registry/whois/inaccuracy_reporting/

Copyright Notice

Copyright 1997-2026, American Registry for Internet Numbers, Ltd.

Registration Comments

-----BEGIN CERTIFICATE-----MIIDozCCAougAwIBAgIUFeE5yhgmBRKwvwU2duRpjDjYx1swDQYJKoZIhvcNAQELBQAwYTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDEaMBgGA1UEAwwRaW50cmVwaWRmaWJlci5jb20wHhcNMjYwMjIwMTc1MDQ0WhcNMjcwMjIwMTc1MDQ0WjBhMQswCQYDVQQGEwJBVTETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMRowGAYDVQQDDBFpbnRyZXBpZGZpYmVyLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKQD38B4KqvYBhrOKoV3zF69dfx/prcRYk4I9rELhienGfuKyJjfA03YyCJG8Bptsb+2BnDdesxJX63DczRXbvEVFQn1SoR0vaWH43xR/lUvBVPThMkjcLQ/33y646b5IRn2vdnBNNHZwQZdeHSiGPzA2kJscVUWU212MnKxexnIuNGn8sBqzLc8ElkmpoYSM+XjrnfzVx96Iu+lqe3cZJfIeNWmIo3o18aSbmFkYbMX9SU+HyMrpiYTXoPyyFmINfYTlsvZ+gWpQ7aH4Nn/B3O7rpteDqBR3LzCQmQvO9GoTEoN4izCKnu6DIlFd/Zf3We+GK1fUjn0twFku3Sqc+ECAwEAAaNTMFEwHQYDVR0OBBYEFCcIJxgBdy4KJ0QggQIPLQqMaRbBMB8GA1UdIwQYMBaAFCcIJxgBdy4KJ0QggQIPLQqMaRbBMA8GA1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBAAMp+pN8df+8apGaBw5r3v1NiICQvNtJ9i0pIkeP2+OXSUJ3oy1phVuuTJ5dtp3sN0t8dp5wxix/JzNZWrSTOnJmtSbafHtbnem9Q97/AOvux8yiax0RcNZZ+J9IyL5jD5KDDcv+y9W4YSylkJqSHzBTFpsvGdWzATasHbaPiyr5X9F5r/sCrcSX8aZ2G9KdSUhB0kIWulF2ybhGabuE3Ex/mIn08W7y+hYeLBDXUQrneggiEUs0aLSqAtckehrD5w4vcowE4OE3qWHPj+QjX1+lKVxyQn/xgxQ4Mxs6Kso+qOOoIiUAb0WlLF9mTpfoS8U+mpkgNVrUMT0uFgn8Ni4=-----END CERTIFICATE-----

Organizations & contacts

2
Organization / registrant
BIF IV
BIIOL
Address
251 Little Falls Drive Wilmington DE 19808 United States
Type
org

Registry · rdap.arin.net

Dns · Administrative · Noc · Abuse · Routing · Technical
BIF IV ARIN Admin
BIAA-ARIN
Address
11001 W 120th Ave #315 Broomfield CO 80021 United States
Organization
Intrepid Fiber Networks
Type
group
Phone (work, voice)
+1-720-680-3200

Registry · rdap.arin.net

Route / route6 records IRR

rr.arin.net:43

BGP observations →

Exact and covering objects from ARIN. These are registered routing policies; they do not confirm a live announcement.

Origin
AS394056
Source
ARIN

BIF IV

Routing object details
route: 72.57.0.0/19
origin: AS394056
descr: BIF IV
admin-c: BIAA-ARIN
tech-c: BIAA-ARIN
mnt-by: MNT-BIIOL
remarks: This object is automatically managed by ARIN
created: 2026-01-22T15:06:03Z
last-modified: 2026-01-22T15:06:03Z
source: ARIN
Origin
AS14618
Source
ARIN

BIF IV

Routing object details
route: 72.57.28.0/22
origin: AS14618
descr: BIF IV
admin-c: BIAA-ARIN
tech-c: BIAA-ARIN
mnt-by: MNT-BIIOL
remarks: This object is automatically managed by ARIN
created: 2026-02-24T16:46:50Z
last-modified: 2026-02-24T16:46:50Z
source: ARIN
Origin
AS16509
Source
ARIN

BIF IV

Routing object details
route: 72.57.28.0/22
origin: AS16509
descr: BIF IV
admin-c: BIAA-ARIN
tech-c: BIAA-ARIN
mnt-by: MNT-BIIOL
remarks: This object is automatically managed by ARIN
created: 2026-02-24T16:47:36Z
last-modified: 2026-02-24T16:47:36Z
source: ARIN
Origin
AS394056
Source
ARIN

251 Little Falls Drive Wilmington DE 19808 United States

Routing object details
route: 72.57.28.0/22
origin: AS394056
descr: 251 Little Falls Drive
Wilmington DE 19808
United States
admin-c: BIAA-ARIN
tech-c: BIAA-ARIN
mnt-by: MNT-BIIOL
created: 2026-02-18T14:33:11Z
last-modified: 2026-02-18T14:33:11Z
source: ARIN
Registry · RDAP Original response
https://rdap.arin.net/registry/ip/72.57.28.0/24
{
    "arin_originas0_originautnums": [],
    "cidr0_cidrs": [
        {
            "v4prefix": "72.57.0.0",
            "length": 19
        }
    ],
    "endAddress": "72.57.31.255",
    "entities": [
        {
            "entities": [
                {
                    "events": [
                        {
                            "eventAction": "last changed",
                            "eventDate": "2026-01-22T10:02:51-05:00"
                        },
                        {
                            "eventAction": "registration",
                            "eventDate": "2023-11-17T15:17:52-05:00"
                        }
                    ],
                    "handle": "BIAA-ARIN",
                    "links": [
                        {
                            "href": "https://rdap.arin.net/registry/entity/BIAA-ARIN",
                            "rel": "self",
                            "type": "application/rdap+json",
                            "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                        },
                        {
                            "href": "https://whois.arin.net/rest/poc/BIAA-ARIN",
                            "rel": "alternate",
                            "type": "application/xml",
                            "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                        }
                    ],
                    "objectClassName": "entity",
                    "port43": "whois.arin.net",
                    "roles": [
                        "dns",
                        "administrative",
                        "noc",
                        "abuse",
                        "routing",
                        "technical"
                    ],
                    "status": [
                        "validated"
                    ],
                    "vcardArray": [
                        "vcard",
                        [
                            [
                                "version",
                                [],
                                "text",
                                "4.0"
                            ],
                            [
                                "adr",
                                {
                                    "label": "11001 W 120th Ave #315\nBroomfield\nCO\n80021\nUnited States"
                                },
                                "text",
                                [
                                    "",
                                    "",
                                    "",
                                    "",
                                    "",
                                    "",
                                    ""
                                ]
                            ],
                            [
                                "fn",
                                [],
                                "text",
                                "BIF IV ARIN Admin"
                            ],
                            [
                                "org",
                                [],
                                "text",
                                "Intrepid Fiber Networks"
                            ],
                            [
                                "kind",
                                [],
                                "text",
                                "group"
                            ],
                            [
                                "email",
                                [],
                                "text",
                                "admin@intrepidfiber.com"
                            ],
                            [
                                "tel",
                                {
                                    "type": [
                                        "work",
                                        "voice"
                                    ]
                                },
                                "text",
                                "+1-720-680-3200"
                            ]
                        ]
                    ]
                }
            ],
            "events": [
                {
                    "eventAction": "last changed",
                    "eventDate": "2023-12-12T13:44:30-05:00"
                },
                {
                    "eventAction": "registration",
                    "eventDate": "2022-09-08T10:52:50-04:00"
                }
            ],
            "handle": "BIIOL",
            "links": [
                {
                    "href": "https://rdap.arin.net/registry/entity/BIIOL",
                    "rel": "self",
                    "type": "application/rdap+json",
                    "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                },
                {
                    "href": "https://whois.arin.net/rest/org/BIIOL",
                    "rel": "alternate",
                    "type": "application/xml",
                    "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                }
            ],
            "objectClassName": "entity",
            "port43": "whois.arin.net",
            "roles": [
                "registrant"
            ],
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "BIF IV"
                    ],
                    [
                        "adr",
                        {
                            "label": "251 Little Falls Drive\nWilmington\nDE\n19808\nUnited States"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "org"
                    ]
                ]
            ]
        }
    ],
    "events": [
        {
            "eventAction": "last changed",
            "eventDate": "2026-02-24T12:34:19-05:00"
        },
        {
            "eventAction": "registration",
            "eventDate": "2025-07-30T07:10:12-04:00"
        }
    ],
    "handle": "NET-72-57-0-0-1",
    "ipVersion": "v4",
    "links": [
        {
            "href": "https://rdap.arin.net/registry/ip/72.57.0.0",
            "rel": "self",
            "type": "application/rdap+json",
            "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
        },
        {
            "href": "https://whois.arin.net/rest/net/NET-72-57-0-0-1",
            "rel": "alternate",
            "type": "application/xml",
            "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
        }
    ],
    "name": "BIIOL",
    "notices": [
        {
            "description": [
                "By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
            ],
            "links": [
                {
                    "href": "https://www.arin.net/resources/registry/whois/tou/",
                    "rel": "terms-of-service",
                    "type": "text/html",
                    "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                }
            ],
            "title": "Terms of Service"
        },
        {
            "description": [
                "If you see inaccuracies in the results, please visit: "
            ],
            "links": [
                {
                    "href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
                    "rel": "inaccuracy-report",
                    "type": "text/html",
                    "value": "https://rdap.arin.net/registry/ip/72.57.28.0/24"
                }
            ],
            "title": "Whois Inaccuracy Reporting"
        },
        {
            "description": [
                "Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
            ],
            "title": "Copyright Notice"
        }
    ],
    "objectClassName": "ip network",
    "parentHandle": "NET-72-0-0-0-0",
    "port43": "whois.arin.net",
    "rdapConformance": [
        "nro_rdap_profile_0",
        "rdap_level_0",
        "cidr0",
        "arin_originas0"
    ],
    "remarks": [
        {
            "description": [
                "-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"
            ],
            "title": "Registration Comments"
        }
    ],
    "startAddress": "72.57.0.0",
    "status": [
        "active"
    ],
    "type": "DIRECT ALLOCATION"
}