ASN AS25878 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS25878?

AS25878 is listed under Quinstreet, 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.

AS25878 Quinstreet, Inc. | IPGeolocation.io

ASN Lookup Tool

Quinstreet, Inc. quinstreet.com

US 7 Routes

AS Data

AS25878

AS25878 – Quinstreet, Inc.

AS Number	25878
AS Name	QNST-DC01
Organization	Quinstreet, Inc.(quins-2)
Country	US
Website	quinstreet.com
Number of IPv4 Routes	7
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2007-10-22

ASN Intelligence API for production workflows

Use ASN data for AS25878 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

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
64.84.40.0/23	AS25878	Quinstreet, Inc.	QUINSTREET	512
67.106.145.0/24	AS25878	Quinstreet, Inc.	Quinstreet, Inc.	256
216.211.170.0/23	AS25878	Quinstreet, Inc.	QuinStreet	512
173.226.108.0/24	AS25878	Quinstreet, Inc.	Quinstreet, Inc.	256
216.211.175.0/24	AS25878	Quinstreet, Inc.	QUINSTREET	256
70.42.22.0/23	AS25878	Quinstreet, Inc.	QuinStreet, Inc.	512
216.211.163.0/24	AS25878	Quinstreet, Inc.	Quinstreet, 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:       25878
ASName:         QNST-DC01
ASHandle:       AS25878
RegDate:        2007-10-22
Updated:        2012-02-24
Comment:        http://www.quinstreet.com    
Ref:            https://rdap.arin.net/registry/autnum/25878


OrgName:        Quinstreet, Inc.
OrgId:          QUINS-2
Address:        302 E. Carson Ave
City:           Las Vegas
StateProv:      NV
PostalCode:     89101
Country:        US
RegDate:        2007-08-21
Updated:        2020-05-19
Ref:            https://rdap.arin.net/registry/entity/QUINS-2


OrgTechHandle: NET4-ARIN
OrgTechName:   Network Engineering Team
OrgTechPhone:  +1-650-578-6864 
OrgTechEmail:  neteng@quinstreet.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NET4-ARIN

OrgAbuseHandle: NET4-ARIN
OrgAbuseName:   Network Engineering Team
OrgAbusePhone:  +1-650-578-6864 
OrgAbuseEmail:  neteng@quinstreet.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NET4-ARIN

RTechHandle: HBL8-ARIN
RTechName:   Blandford, Hemi 
RTechPhone:  +1-650-578-6864 
RTechEmail:  hblandford@quinstreet.com
RTechRef:    https://rdap.arin.net/registry/entity/HBL8-ARIN

RAbuseHandle: NET4-ARIN
RAbuseName:   Network Engineering Team
RAbusePhone:  +1-650-578-6864 
RAbuseEmail:  neteng@quinstreet.com
RAbuseRef:    https://rdap.arin.net/registry/entity/NET4-ARIN

RNOCHandle: NET4-ARIN
RNOCName:   Network Engineering Team
RNOCPhone:  +1-650-578-6864 
RNOCEmail:  neteng@quinstreet.com
RNOCRef:    https://rdap.arin.net/registry/entity/NET4-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

Peers

AS Number	Description	Country
AS14743	Unitas Global	US
AS33667	Comcast Cable Communications, LLC	US
AS7018	AT&T Enterprises, LLC	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3549	Level 3 Parent, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS22773	Cox Communications Inc.	US

Upstreams

AS Number	Description	Country
AS14743	Unitas Global	US
AS33667	Comcast Cable Communications, LLC	US
AS7018	AT&T Enterprises, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS22773	Cox Communications Inc.	US