ASN AS3401 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3401?

AS3401 is listed under City of Seattle, Dept. of Admin. Services.

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.

AS3401 City of Seattle, Dept. of Admin. Services

ASN Lookup Tool

City of Seattle, Dept. of Admin. Services seattle.gov

US 3 Routes

AS Data

AS3401

AS3401 – City of Seattle, Dept. of Admin. Services

AS Number	3401
AS Name	SEATTLE
Organization	City of Seattle, Dept. of Admin. Services(csdas)
Country	US
Website	seattle.gov
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	1994-02-04

ASN Intelligence API for production workflows

Use ASN data for AS3401 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
156.74.248.0/22	AS3401	City of Seattle, Dept. of Admin. Services	City of Seattle	1024
156.74.248.0/21	AS3401	City of Seattle, Dept. of Admin. Services	City of Seattle	2048
156.74.252.0/22	AS3401	City of Seattle, Dept. of Admin. Services	City of Seattle	1024

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:       3401
ASName:         SEATTLE
ASHandle:       AS3401
RegDate:        1994-02-04
Updated:        2013-12-18    
Ref:            https://rdap.arin.net/registry/autnum/3401


OrgName:        City of Seattle, Dept. of Admin. Services
OrgId:          CSDAS
Address:        700 5th Ave
City:           Seattle
StateProv:      WA
PostalCode:     98104
Country:        US
RegDate:        1994-02-04
Updated:        2013-12-18
Ref:            https://rdap.arin.net/registry/entity/CSDAS


OrgTechHandle: IIT10-ARIN
OrgTechName:   Internet Infrastructure Team
OrgTechPhone:  +1-206-684-7304 
OrgTechEmail:  perimeter@seattle.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/IIT10-ARIN

OrgAbuseHandle: IIT10-ARIN
OrgAbuseName:   Internet Infrastructure Team
OrgAbusePhone:  +1-206-684-7304 
OrgAbuseEmail:  perimeter@seattle.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/IIT10-ARIN

RAbuseHandle: IIT10-ARIN
RAbuseName:   Internet Infrastructure Team
RAbusePhone:  +1-206-684-7304 
RAbuseEmail:  perimeter@seattle.gov
RAbuseRef:    https://rdap.arin.net/registry/entity/IIT10-ARIN

RTechHandle: IIT10-ARIN
RTechName:   Internet Infrastructure Team
RTechPhone:  +1-206-684-7304 
RTechEmail:  perimeter@seattle.gov
RTechRef:    https://rdap.arin.net/registry/entity/IIT10-ARIN

RTechHandle: HAGEN17-ARIN
RTechName:   Hagen, Kenneth 
RTechPhone:  +1-206-459-0027 
RTechEmail:  ken.hagen@seattle.gov
RTechRef:    https://rdap.arin.net/registry/entity/HAGEN17-ARIN

RNOCHandle: IIT10-ARIN
RNOCName:   Internet Infrastructure Team
RNOCPhone:  +1-206-684-7304 
RNOCEmail:  perimeter@seattle.gov
RNOCRef:    https://rdap.arin.net/registry/entity/IIT10-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
AS1239	Cogent Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US