ASN AS4866 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS4866?

AS4866 is listed under Yahoo Holdings Inc..

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS4866 Yahoo Holdings Inc. | IPGeolocation.io

ASN Lookup Tool

Yahoo Holdings Inc. yahoo.com

US 3 Routes

AS Data

AS4866

AS4866 – Yahoo Holdings Inc.

AS Number	4866
AS Name	YAHOO-POLYV
Organization	Yahoo Holdings Inc. (oh-207)
Country	US
Website	yahoo.com
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2012-09-19

ASN Intelligence API for production workflows

Use ASN data for AS4866 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.29.186.0/24	AS4866	Yahoo Holdings Inc.	Yahoo Holdings Inc.	256
204.29.187.0/24	AS4866	Yahoo Holdings Inc.	Yahoo Holdings Inc.	256
192.152.66.0/24	AS4866	Yahoo Holdings Inc.	Yahoo Holdings Inc.	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       4866
ASName:         YAHOO-POLYV
ASHandle:       AS4866
RegDate:        2012-09-19
Updated:        2026-10-21
Comment:        -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/autnum/4866



OrgName:        Yahoo Holdings Inc.
OrgId:          OH-207
Address:        770 BROADWAY FL 9
City:           New York
StateProv:      NY
PostalCode:     10003-9558
Country:        US
RegDate:        2018-12-21
Updated:        2025-09-03
Ref:            https://rdap.arin.net/registry/entity/OH-207


OrgAbuseHandle: OATHA-ARIN
OrgAbuseName:   Oath Abuse
OrgAbusePhone:  +1-408-349-3300 
OrgAbuseEmail:  rir-abuse@yahooinc.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/OATHA-ARIN

OrgTechHandle: OTC2-ARIN
OrgTechName:   Oath Tech Contact
OrgTechPhone:  +1-408-349-5555 
OrgTechEmail:  rir-tech@yahooinc.com
OrgTechRef:    https://rdap.arin.net/registry/entity/OTC2-ARIN

OrgNOCHandle: OATHN-ARIN
OrgNOCName:   Oath NOC
OrgNOCPhone:  +1-408-349-5555 
OrgNOCEmail:  rir-noc@yahoo-inc.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/OATHN-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "4866",
    "as_handle" : "AS4866",
    "as_name" : "YAHOO-POLYV",
    "tech_contacts" : [ "OTC2-ARIN" ],
    "abuse_contacts" : [ "OATHA-ARIN" ],
    "date_created" : "2012-09-19",
    "date_updated" : "2026-10-21",
    "source" : "https://rdap.arin.net/registry/autnum/4866"
  } ],
  "organization" : {
    "handle" : "OH-207",
    "name" : "Yahoo Holdings Inc.",
    "address" : [ "770 BROADWAY FL 9", "New York", "NY", "10003-9558", "US" ],
    "street" : "Broadway",
    "city" : "New York",
    "state" : "NY",
    "zip_code" : "10003-9558",
    "country" : [ "US" ],
    "date_created" : "2018-12-21",
    "date_updated" : "2025-09-03",
    "source" : "https://rdap.arin.net/registry/entity/OH-207",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "OTC2-ARIN",
    "name" : "Oath Tech Contact",
    "email" : [ "rir-tech@yahooinc.com" ],
    "phone" : [ "+1-408-349-5555" ],
    "source" : "https://rdap.arin.net/registry/entity/OTC2-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "OATHA-ARIN",
    "name" : "Oath Abuse",
    "email" : [ "rir-abuse@yahooinc.com" ],
    "phone" : [ "+1-408-349-3300" ],
    "source" : "https://rdap.arin.net/registry/entity/OATHA-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS16509	Amazon.com, Inc.	US
AS14618	Amazon.com, Inc.	US

Upstreams

AS Number	Description	Country
AS16509	Amazon.com, Inc.	US
AS14618	Amazon.com, Inc.	US

Contacts

Email Contacts

rir-tech@yahooinc.com

Abuse Contacts

rir-abuse@yahooinc.com