Free network tools
AS WHOIS
Look up an Autonomous System — holder, registry, contacts, announced IPv4/IPv6 prefixes, upstreams and downstreams.
Network Report (All-in-one) BGP Looking Glass BGP Security Check RPKI Validator BGP Hijack & Leak Monitor ASN Intelligence Internet Outages & Anomalies Country Internet Report Domain Insights IP WHOIS AS WHOIS
AS11686
ZAYO-ENA-11686 - Zayo Bandwidth Announcing routesAS nameZAYO-ENA-11686
OrganisationZayo Bandwidth
Registry (RIR)ARIN
HandleAS11686
RangeAS11686
Registered16 Nov 1998
Last changed02 Oct 2025
Abuse contact[email protected]
264IPv4 prefixes
6IPv6 prefixes
14Upstreams
13Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS6461 | ZAYO-6461 - Zayo Bandwidth | 2230 |
| AS174 | COGENT-174 - Cogent Communications, LLC | 1461 |
| AS6939 | HURRICANE - Hurricane Electric LLC | 560 |
| AS14041 | AS-FRGP - University Corporation for Atmospheric Research | 43 |
| AS137409 | GSLNETWORKS-AS-AP - GSL Networks Pty LTD | 6 |
| AS14048 | MEMPHIS-EDU - The University of Memphis | 6 |
| AS3450 | UTK - University of Tennessee | 6 |
| AS37468 | Angola Cables - Angola Cables | 2 |
| AS4230 | AS4230 - CLARO S.A. | 2 |
| AS7195 | AS7195 - EDGEUNO S.A.S | 2 |
| AS1031 | PEER1-1031 - PEER 1031 LLC | 1 |
| AS58453 | CMI-INT-HK - China Mobile International Limited | 1 |
| AS61568 | AS61568 - ALOO TELECOM - FSF TECNOLOGIA SA | 1 |
| AS64126 | AS64126 - DOMINICAN TELECOM PRIME, DTP, S.R.L. | 1 |
Downstreams
| AS | Network name | Visibility |
|---|---|---|
| AS394209 | ECBOCES-VNETS - East Central BOCES | 375 |
| AS40252 | CLEVELAND-MUNICIPAL-SCHOOL-DISTRICT - Cleveland Municipal School District | 270 |
| AS25971 | MILWAUKEE-PS - Milwaukee Public Schools | 268 |
| AS393393 | AISD-AS - Amarillo ISD | 260 |
| AS400305 | MSDMTVERNON-IN - MSD of Mt. Vernon | 256 |
| AS401912 | ASN-BVSD-01 - Boulder Valley School District (BVSD) | 256 |
| AS393273 | ESC17-AS - Education Service Center, Region 17 | 255 |
| AS46930 | ASN-DPSD - Denver Public Schools | 254 |
| AS64248 | WCPS-ASN-01 - Worcester County Public Schools | 254 |
| AS6092 | HARFORDCC-AS - Harford Community College | 251 |
| AS46745 | GCSSK12NET - Gainesville City Schools | 51 |
| AS25964 | HCBE-17 - Henry County Board of Education | 45 |
| AS40109 | FORSYTH-K12-GA-US - Forsyth County Board of Education | 28 |
IPv4 prefixes (264)
170.185.172.0/24170.185.39.0/24170.185.169.0/24170.185.34.0/24170.185.232.0/21165.138.9.0/24170.185.192.0/24170.185.104.0/24170.185.204.0/24170.185.164.0/24170.185.62.0/24165.138.86.0/24170.185.68.0/24170.185.198.0/24170.185.94.0/24170.185.120.0/24170.185.135.0/2496.5.88.0/2196.4.8.0/2196.5.241.0/24170.185.91.0/24170.185.76.0/24204.63.176.0/2138.29.170.0/24170.185.123.0/24170.185.84.0/23170.185.95.0/24170.185.114.0/24170.185.152.0/24165.138.169.0/24170.185.99.0/24170.185.129.0/24170.185.97.0/24204.86.168.0/21170.185.225.0/24165.139.44.0/24170.185.32.0/24170.185.83.0/24170.185.88.0/24170.185.139.0/24207.191.184.0/22165.139.208.0/22170.185.144.0/2496.5.112.0/21170.185.82.0/24170.185.59.0/24170.185.220.0/24170.185.151.0/24170.185.67.0/24170.185.90.0/24170.185.105.0/24170.185.209.0/24170.185.197.0/2496.5.216.0/21170.185.168.0/24168.254.0.0/18170.185.145.0/24170.185.111.0/24170.185.61.0/24170.185.191.0/24165.138.56.0/24170.185.79.0/24170.180.190.0/2496.5.120.0/21170.185.173.0/24207.191.176.0/21170.185.201.0/24170.185.24.0/24170.185.101.0/24165.139.0.0/16170.185.124.0/24170.185.50.0/24170.185.180.0/24165.139.202.0/24170.185.199.0/24170.185.96.0/24170.185.157.0/24170.185.108.0/23170.185.113.0/2496.5.224.0/21170.185.142.0/24165.138.0.0/16170.185.248.0/2396.5.0.0/18170.185.54.0/24165.139.133.0/24170.185.98.0/24170.185.100.0/2496.5.176.0/2196.5.117.0/24170.185.156.0/2496.5.132.0/24170.185.223.0/24170.185.184.0/2496.5.8.0/23168.254.64.0/18170.185.188.0/2496.5.122.0/24170.185.205.0/24170.185.44.0/24170.185.63.0/2496.5.160.0/21170.185.134.0/24170.185.128.0/17170.185.29.0/24170.185.159.0/24170.185.116.0/24170.185.52.0/24170.185.21.0/24170.185.128.0/24165.139.47.0/24168.213.254.0/23170.185.165.0/24170.185.200.0/24170.185.126.0/24170.185.16.0/22170.185.155.0/24170.185.25.0/24170.185.35.0/24170.185.81.0/24170.185.58.0/24207.191.176.0/20170.185.182.0/24170.185.231.0/24170.185.149.0/24170.185.49.0/24170.185.208.0/2496.5.64.0/19170.185.60.0/24170.185.42.0/24170.185.196.0/24170.185.57.0/24170.185.106.0/24170.185.33.0/24170.185.0.0/20170.185.250.0/24170.185.187.0/24165.138.88.0/24170.185.80.0/24170.185.207.0/24170.185.195.0/24170.185.222.0/24170.185.158.0/24170.185.30.0/24170.185.70.0/24170.185.181.0/24170.185.161.0/24170.185.160.0/24170.185.177.0/24170.185.51.0/24170.185.66.0/24170.185.137.0/24170.185.0.0/17170.185.93.0/24170.185.41.0/24170.185.110.0/24170.185.171.0/24204.63.240.0/21170.185.73.0/24168.254.50.0/24170.185.89.0/24170.180.0.0/14170.185.210.0/24170.185.103.0/24204.86.176.0/21170.185.56.0/24170.185.221.0/24170.185.138.0/24170.185.117.0/24170.185.217.0/24170.185.22.0/24170.185.86.0/24170.185.45.0/24165.139.157.0/24170.185.31.0/24170.185.163.0/24170.185.162.0/24170.185.38.0/2496.5.120.0/23170.185.46.0/23170.185.55.0/2496.4.128.0/18170.180.161.0/24170.185.26.0/24204.86.168.0/24170.185.65.0/24170.185.27.0/24170.185.69.0/24170.185.75.0/24170.185.92.0/24170.185.150.0/24170.185.183.0/24170.185.17.0/24170.185.127.0/24165.139.32.0/24170.185.146.0/24170.185.132.0/24165.138.90.0/24170.185.126.0/23170.185.72.0/2496.4.174.0/23170.185.179.0/2496.5.128.0/20170.185.214.0/23170.185.174.0/23170.185.23.0/24170.185.141.0/24207.191.188.0/2296.5.144.0/22165.138.121.0/24170.185.118.0/24170.185.206.0/24170.185.107.0/24170.185.153.0/24170.185.136.0/24170.185.130.0/24170.185.53.0/2496.5.192.0/20170.185.43.0/24170.185.143.0/2496.5.96.0/21170.185.133.0/24170.185.167.0/24170.185.190.0/24170.185.202.0/24170.185.194.0/24170.185.36.0/23170.185.28.0/24170.185.125.0/24165.138.138.0/24170.185.178.0/24170.185.213.0/24170.185.102.0/24170.185.218.0/24170.185.121.0/24170.185.122.0/24165.138.165.0/2496.4.0.0/1596.5.208.0/21170.185.189.0/24168.254.0.0/16170.185.219.0/24170.185.77.0/2496.5.240.0/20208.119.0.0/16170.185.216.0/24170.185.224.0/24170.185.78.0/24170.185.74.0/24170.185.212.0/2496.4.192.0/18170.185.71.0/2496.5.156.0/22170.185.240.0/2172.162.136.0/22170.185.170.0/24170.185.147.0/2496.4.0.0/1896.4.64.0/18170.185.112.0/24170.185.176.0/24170.185.40.0/24170.185.48.0/24170.185.211.0/24
IPv6 prefixes (6)
RPKI-validate all prefixes of AS11686
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Zayo Bandwidth | ZAYOB | 1401 Wynkoop St., #500, Denver, CO, 80202, United States | |
| technical, administrative, noc | Zayo IP Engineering | ZIE-ARIN | [email protected], +1-866-236-2824 | 1805 29th Street, Suite 2050, Boulder, CO, 80301, United States |
| abuse | Abuse | ABUSE5675-ARIN | [email protected], +1-866-236-2824 | 1805 29th Street, Suite 2050, Boulder, CO, 80301, United States |
Raw registry response
{
"endAutnum": 11686,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-09T12:53:47-04:00"
},
{
"eventAction": "registration",
"eventDate": "2013-07-18T03:08:18-04:00"
}
],
"handle": "ZIE-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ZIE-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11686"
},
{
"href": "https://whois.arin.net/rest/poc/ZIE-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11686"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"administrative",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "1805 29th Street, Suite 2050\nBoulder\nCO\n80301\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Zayo IP Engineering"
],
[
"org",
[],
"text",
"Zayo Group"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-866-236-2824"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-12-19T08:48:34-05:00"
},
{
"eventAction": "registration",
"eventDate": "2016-10-06T09:17:28-04:00"
}
],
"handle": "ABUSE5675-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE5675-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11686"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE5675-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11686"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Please direct all abuse issues to this contact."
],
"title": "Registration Comments"
},
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2024-12-18"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "1805 29th Street, Suite 2050\nBoulder\nCO\n80301\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Abuse"
],
[
"org",
[],
"text",
"Zayo Group - Abuse"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-866-236-2824"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "2007-10-12T10:16:00-04:00"
}
],
"handle": "ZAYOB",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ZAYOB",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11686"
},
{
"href": "https://whois.arin.net/rest/org/ZAYOB",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11686"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Zayo Bandwidth"
],
[
"adr",
{
"label": "1401 Wynkoop St.\n#500\nDenver\nCO\n80202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-02T07:38:16-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-11-16T00:00:00-05:00"
}
],
"handle": "AS11686",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11686",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11686"
},
{
"href": "https://whois.arin.net/rest/asn/AS11686",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11686"
}
],
"name": "ZAYO-ENA-11686",
"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/11686"
}
],
"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/11686"
}
],
"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"
],
"startAutnum": 11686,
"status": [
"active"
]
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.