Registration
IPv4 Prefixes
9 prefixes · 1,792 addresses · 3 top-level Routing data as of 2026-10-09 00:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 12.221.136.0/22 | 12.221.136.0 – 12.221.139.255 | 1,024 |
| 12.221.136.0/24 | 12.221.136.0 – 12.221.136.255 | 256 |
| 12.221.137.0/24 | 12.221.137.0 – 12.221.137.255 | 256 |
| 12.221.138.0/24 | 12.221.138.0 – 12.221.138.255 | 256 |
| 12.221.139.0/24 | 12.221.139.0 – 12.221.139.255 | 256 |
| 12.231.166.0/23 | 12.231.166.0 – 12.231.167.255 | 512 |
| 12.231.166.0/24 | 12.231.166.0 – 12.231.166.255 | 256 |
| 12.231.167.0/24 | 12.231.167.0 – 12.231.167.255 | 256 |
| 23.136.88.0/24 | 23.136.88.0 – 23.136.88.255 | 256 |
IPv6 Prefixes
1 prefix · 4,096 × /48 Routing data as of 2026-10-09 00:00 UTC
| Prefix | Addresses |
|---|---|
| 2602:fdb1:: | 292 |
BGP Neighbours
1 unique neighbour · 1 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (1)
AS Name AS paths IPv4 sightings IPv6 sightings AS22974 CHARTER-22974-MICHIGAN-DETROIT-C3 - Charter Communications LLC 701 3,068 349
Raw RDAP Response
{
"endAutnum": 54638,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-05T07:13:12-04:00"
},
{
"eventAction": "registration",
"eventDate": "2009-04-02T13:42:11-04:00"
}
],
"handle": "ECF-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ECF-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/54638"
},
{
"href": "https://whois.arin.net/rest/poc/ECF-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/54638"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing",
"abuse",
"noc",
"dns",
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "5454 Hampton Place\nSaginaw\nMI\n48604\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Edward C French"
],
[
"n",
{},
"text",
[
"French",
"Edward",
"C",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-989-498-4534"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-989-498-4554"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-03T05:36:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2015-03-24T18:18:10-04:00"
}
],
"handle": "TLG8-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TLG8-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/54638"
},
{
"href": "https://whois.arin.net/rest/poc/TLG8-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/54638"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "5410 Hampton Place\nSaginaw\nMI\n48604\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Terry L Girard"
],
[
"org",
{},
"text",
"Netsource One"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-989-498-4534"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-12-07T10:53:47-05:00"
},
{
"eventAction": "registration",
"eventDate": "2017-04-07T04:08:28-04:00"
}
],
"handle": "SKRZY1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SKRZY1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/54638"
},
{
"href": "https://whois.arin.net/rest/poc/SKRZY1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/54638"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"noc",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "5410 Hampton Place\nSaginaw\nMI\n48604\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Andy Skrzypczak"
],
[
"n",
{},
"text",
[
"Skrzypczak",
"Andy",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-989-797-1085"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-04-05T07:35:13-04:00"
},
{
"eventAction": "registration",
"eventDate": "2009-04-30T04:11:40-04:00"
}
],
"handle": "NETSO-5",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETSO-5",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/54638"
},
{
"href": "https://whois.arin.net/rest/org/NETSO-5",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/54638"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"NETSOURCE ONE, INC"
],
[
"adr",
{
"label": "5454 HAMPTON PL\nSAGINAW\nMI\n48604\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-04-16T12:54:54-04:00"
},
{
"eventAction": "registration",
"eventDate": "2012-04-16T12:54:54-04:00"
}
],
"handle": "AS54638",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/54638",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/54638"
},
{
"href": "https://whois.arin.net/rest/asn/AS54638",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/54638"
}
],
"name": "NSO",
"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/autnum/54638"
}
],
"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/autnum/54638"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"remarks": [
{
"description": [
"http://www.nsoit.com"
],
"title": "Registration Comments"
}
],
"startAutnum": 54638,
"status": [
"active"
]
} Contact details of private individuals are redacted.