Organization
Jeffco Public Schools
JCPS-ASN
Registered
Feb 14, 2011
15 years ago
IPv4 Prefixes
3
2,048 addresses
IPv6 Prefixes
0
BGP Neighbours
1
1 upstream/peer · 0 downstream
Registration
AS Number AS26661 AS Name JCPS-ASN Organization Jeffco Public Schools Organization ID JCPS-1 Address 1829 Denver West Drive, Building 27, Golden, CO, 80401, United States Country United States (US) Registry ARIN Allocated Feb 14, 2011 Record Created Feb 14, 2011 Last Updated Feb 24, 2012 Status
active
WHOIS Server whois.arin.net AS Description JCPS-ASN - Jeffco Public Schools, US Abuse Email [email protected] Abuse Phone +1-303-982-6500 IPv4 Prefixes
3 prefixes · 2,048 addresses · 1 top-level Routing data as of 2026-10-17 00:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 199.96.184.0/21 | 199.96.184.0 – 199.96.191.255 | 2,048 |
| 199.96.184.0/22 | 199.96.184.0 – 199.96.187.255 | 1,024 |
| 199.96.188.0/22 | 199.96.188.0 – 199.96.191.255 | 1,024 |
IPv6 Prefixes
This AS does not currently announce any IPv6 prefixes.
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 AS14041 AS-FRGP - University Corporation for Atmospheric Research 268 1,009 0
Raw RDAP Response
{
"endAutnum": 26661,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-17T11:16:34-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-05-19T19:06:06-04:00"
}
],
"handle": "JCPSA1-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JCPSA1-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/poc/JCPSA1-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
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"vcardArray": [
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[
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"text",
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[
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[
"fn",
{},
"text",
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],
[
"org",
{},
"text",
"Jefferson County Public School District"
],
[
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{},
"text",
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],
[
"email",
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"text",
"[email protected]"
],
[
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{
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},
"text",
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},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-12-03T13:32:11-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-05-19T19:06:05-04:00"
}
],
"handle": "JCPSA-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JCPSA-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/poc/JCPSA-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-12-03"
],
"title": "Unvalidated POC"
}
],
"roles": [
"administrative"
],
"vcardArray": [
"vcard",
[
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{},
"text",
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[
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"label": "1829 Denver West Drive\r\nBuilding #27\nGolden\nCO\n80401\nUnited States"
},
"text",
[
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],
[
"fn",
{},
"text",
"JCPS Admin"
],
[
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{},
"text",
"Jefferson County Public School District"
],
[
"kind",
{},
"text",
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],
[
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{},
"text",
"[email protected]"
],
[
"tel",
{
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"+1-303-982-6500"
]
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},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-13T11:32:24-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-05-19T19:06:05-04:00"
}
],
"handle": "JCPST-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JCPST-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/poc/JCPST-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
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],
"vcardArray": [
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[
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"text",
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],
[
"adr",
{
"label": "1829 Denver West Drive\r\nBuilding #27\nGolden\nCO\n80401\nUnited States"
},
"text",
[
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]
],
[
"fn",
{},
"text",
"JCPS Tech"
],
[
"org",
{},
"text",
"Jefferson County Public School District"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
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},
"text",
"+1-303-982-6500"
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}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2011-02-10T14:31:52-05:00"
},
{
"eventAction": "registration",
"eventDate": "1998-11-20T00:00:00-05:00"
}
],
"handle": "JCPS-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JCPS-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/org/JCPS-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"vcardArray": [
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[
[
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{},
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],
[
"fn",
{},
"text",
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],
[
"adr",
{
"label": "1829 Denver West Drive\r\nBuilding 27\nGolden\nCO\n80401\nUnited States"
},
"text",
[
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]
],
[
"kind",
{},
"text",
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]
},
{
"events": [
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"eventDate": "2025-11-13T11:32:24-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-05-19T19:06:05-04:00"
}
],
"handle": "JCPST-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JCPST-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/poc/JCPST-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
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],
"vcardArray": [
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[
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{},
"text",
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],
[
"adr",
{
"label": "1829 Denver West Drive\r\nBuilding #27\nGolden\nCO\n80401\nUnited States"
},
"text",
[
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"",
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""
]
],
[
"fn",
{},
"text",
"JCPS Tech"
],
[
"org",
{},
"text",
"Jefferson County Public School District"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
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]
},
"text",
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]
]
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],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-02-24T09:44:34-05:00"
},
{
"eventAction": "registration",
"eventDate": "2011-02-14T14:02:51-05:00"
}
],
"handle": "AS26661",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/26661",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/26661"
},
{
"href": "https://whois.arin.net/rest/asn/AS26661",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/26661"
}
],
"name": "JCPS-ASN",
"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/26661"
}
],
"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/26661"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
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"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 26661,
"status": [
"active"
]
} Contact details of private individuals are redacted.