ASN AS18888 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS18888?

AS18888 is listed under ZILLOW, 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.

AS18888 ZILLOW, INC. | IPGeolocation.io

ZILLOW, INC. zillow.com

US 6 Routes

AS Data

AS18888

AS18888 – ZILLOW, INC.

AS Number	18888
AS Name	AS-ZILLOW
Organization	ZILLOW, INC.(zillo)
Country	US
Website	zillow.com
Number of IPv4 Routes	5
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-11-17

ASN Intelligence API for production workflows

Use ASN data for AS18888 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.211.13.0/24	AS18888	ZILLOW, INC.	ZILLOW, INC.	256
64.42.191.0/24	AS18888	ZILLOW, INC.	ZILLOW, INC.	256
64.42.187.0/24	AS18888	ZILLOW, INC.	ZILLOW, INC.	256
2620:115:d::/48	AS18888	ZILLOW, INC.	ZILLOW, INC.	~1×10²⁴
209.133.71.0/24	AS18888	ZILLOW, INC.	ZILLOW, INC.	256
64.42.189.0/24	AS18888	ZILLOW, INC.	ZILLOW, 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:       18888
ASName:         AS-ZILLOW
ASHandle:       AS18888
RegDate:        2006-11-17
Updated:        2023-02-26    
Ref:            https://rdap.arin.net/registry/autnum/18888


OrgName:        ZILLOW, INC.
OrgId:          ZILLO
Address:        1301 Second Avenue, Floor 31
City:           Seattle
StateProv:      WA
PostalCode:     98101
Country:        US
RegDate:        2005-03-17
Updated:        2026-02-20
Comment:        http://www.zillow.com noc@zillow.com
Ref:            https://rdap.arin.net/registry/entity/ZILLO


OrgTechHandle: AAB43-ARIN
OrgTechName:   Boley, Alexander Alexander
OrgTechPhone:  +1-312-766-9197 
OrgTechEmail:  alexbol@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/AAB43-ARIN

OrgTechHandle: ZIDON-ARIN
OrgTechName:   Zidones, Elizabeth 
OrgTechPhone:  +1-813-557-3680 
OrgTechEmail:  elizabethz@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ZIDON-ARIN

OrgAbuseHandle: NEVLI3-ARIN
OrgAbuseName:   Nevlida, Michael 
OrgAbusePhone:  +1-507-400-0858 
OrgAbuseEmail:  michaelne@zillowgroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NEVLI3-ARIN

OrgAbuseHandle: KIBBE1-ARIN
OrgAbuseName:   Kibbey, Jeffrey 
OrgAbusePhone:  +1-206-757-4753 
OrgAbuseEmail:  JeffreyKi@ZillowGroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KIBBE1-ARIN

OrgTechHandle: DBE78-ARIN
OrgTechName:   Beitel, David 
OrgTechPhone:  +1-206-470-7105 
OrgTechEmail:  davebei@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DBE78-ARIN

OrgTechHandle: MARTE162-ARIN
OrgTechName:   Marte, Aaron 
OrgTechPhone:  +1-570-285-4161 
OrgTechEmail:  aaronmart@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MARTE162-ARIN

OrgAbuseHandle: AAB43-ARIN
OrgAbuseName:   Boley, Alexander Alexander
OrgAbusePhone:  +1-312-766-9197 
OrgAbuseEmail:  alexbol@zillowgroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AAB43-ARIN

OrgAbuseHandle: ZIDON-ARIN
OrgAbuseName:   Zidones, Elizabeth 
OrgAbusePhone:  +1-813-557-3680 
OrgAbuseEmail:  elizabethz@zillowgroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ZIDON-ARIN

OrgAbuseHandle: DBE78-ARIN
OrgAbuseName:   Beitel, David 
OrgAbusePhone:  +1-206-470-7105 
OrgAbuseEmail:  davebei@zillowgroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DBE78-ARIN

OrgNOCHandle: ZILLO-ARIN
OrgNOCName:   Zillow NOC
OrgNOCPhone:  +1-206-470-7175 
OrgNOCEmail:  noc@zillow.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ZILLO-ARIN

OrgTechHandle: KIBBE1-ARIN
OrgTechName:   Kibbey, Jeffrey 
OrgTechPhone:  +1-206-757-4753 
OrgTechEmail:  JeffreyKi@ZillowGroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/KIBBE1-ARIN

OrgTechHandle: NEVLI3-ARIN
OrgTechName:   Nevlida, Michael 
OrgTechPhone:  +1-507-400-0858 
OrgTechEmail:  michaelne@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NEVLI3-ARIN

OrgTechHandle: GUERR321-ARIN
OrgTechName:   Guerrero, Danny 
OrgTechPhone:  +1-425-533-7679 
OrgTechEmail:  dannyg@zillowgroup.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GUERR321-ARIN

OrgAbuseHandle: MARTE162-ARIN
OrgAbuseName:   Marte, Aaron 
OrgAbusePhone:  +1-570-285-4161 
OrgAbuseEmail:  aaronmart@zillowgroup.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MARTE162-ARIN

RAbuseHandle: ZIDON-ARIN
RAbuseName:   Zidones, Elizabeth 
RAbusePhone:  +1-813-557-3680 
RAbuseEmail:  elizabethz@zillowgroup.com
RAbuseRef:    https://rdap.arin.net/registry/entity/ZIDON-ARIN

RAbuseHandle: AMESS44-ARIN
RAbuseName:   Ames, Scott 
RAbusePhone:  +1-206-591-0587 
RAbuseEmail:  scotta@zillowgroup.com
RAbuseRef:    https://rdap.arin.net/registry/entity/AMESS44-ARIN

RTechHandle: AMESS44-ARIN
RTechName:   Ames, Scott 
RTechPhone:  +1-206-591-0587 
RTechEmail:  scotta@zillowgroup.com
RTechRef:    https://rdap.arin.net/registry/entity/AMESS44-ARIN

RTechHandle: KIBBE1-ARIN
RTechName:   Kibbey, Jeffrey 
RTechPhone:  +1-206-757-4753 
RTechEmail:  JeffreyKi@ZillowGroup.com
RTechRef:    https://rdap.arin.net/registry/entity/KIBBE1-ARIN

RNOCHandle: ZILLO-ARIN
RNOCName:   Zillow NOC
RNOCPhone:  +1-206-470-7175 
RNOCEmail:  noc@zillow.com
RNOCRef:    https://rdap.arin.net/registry/entity/ZILLO-ARIN

RTechHandle: DBE78-ARIN
RTechName:   Beitel, David 
RTechPhone:  +1-206-470-7105 
RTechEmail:  davebei@zillowgroup.com
RTechRef:    https://rdap.arin.net/registry/entity/DBE78-ARIN

RAbuseHandle: KIBBE1-ARIN
RAbuseName:   Kibbey, Jeffrey 
RAbusePhone:  +1-206-757-4753 
RAbuseEmail:  JeffreyKi@ZillowGroup.com
RAbuseRef:    https://rdap.arin.net/registry/entity/KIBBE1-ARIN

RTechHandle: ZIDON-ARIN
RTechName:   Zidones, Elizabeth 
RTechPhone:  +1-813-557-3680 
RTechEmail:  elizabethz@zillowgroup.com
RTechRef:    https://rdap.arin.net/registry/entity/ZIDON-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
AS7018	AT&T Enterprises, LLC	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS11404	Wave Broadband	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS11404	Wave Broadband	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US

ASN Lookup Tool

ASN Summary