ASN AS21718 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21718?

AS21718 is listed under Northwest Natural Gas.

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.

AS21718 Northwest Natural Gas

ASN Lookup Tool

Northwest Natural Gas nwnatural.com

US 5 Routes

AS Data

AS21718

AS21718 – Northwest Natural Gas

AS Number	21718
AS Name	NW-NATURAL-GAS
Organization	Northwest Natural Gas(nng-4)
Country	US
Website	nwnatural.com
Number of IPv4 Routes	5
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-06-13

ASN Intelligence API for production workflows

Use ASN data for AS21718 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.122.247.0/24	AS21718	Northwest Natural Gas	Northwest Natural Gas Company	256
192.122.245.0/24	AS21718	Northwest Natural Gas	Northwest Natural Gas Company	256
192.122.243.0/24	AS21718	Northwest Natural Gas	Northwest Natural Gas Company	256
192.122.246.0/24	AS21718	Northwest Natural Gas	Northwest Natural Gas Company	256
192.122.244.0/24	AS21718	Northwest Natural Gas	Northwest Natural Gas Company	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:       21718
ASName:         NW-NATURAL-GAS
ASHandle:       AS21718
RegDate:        2001-06-13
Updated:        2025-09-04    
Ref:            https://rdap.arin.net/registry/autnum/21718


OrgName:        Northwest Natural Gas
OrgId:          NNG-4
Address:        250 SW Taylor St
City:           Portland
StateProv:      OR
PostalCode:     97204
Country:        US
RegDate:        2001-06-13
Updated:        2025-08-29
Ref:            https://rdap.arin.net/registry/entity/NNG-4


OrgAbuseHandle: HARLO39-ARIN
OrgAbuseName:   Harlow, Bryan 
OrgAbusePhone:  +1-360-355-0435 
OrgAbuseEmail:  bryan.harlow@nwnatural.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

OrgRoutingHandle: HARLO39-ARIN
OrgRoutingName:   Harlow, Bryan 
OrgRoutingPhone:  +1-360-355-0435 
OrgRoutingEmail:  bryan.harlow@nwnatural.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

OrgAbuseHandle: RHA368-ARIN
OrgAbuseName:   Andal, Rowell H
OrgAbusePhone:  +1-503-610-7743 
OrgAbuseEmail:  rowell.andal@nwnatural.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

OrgNOCHandle: HARLO39-ARIN
OrgNOCName:   Harlow, Bryan 
OrgNOCPhone:  +1-360-355-0435 
OrgNOCEmail:  bryan.harlow@nwnatural.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

OrgDNSHandle: RHA368-ARIN
OrgDNSName:   Andal, Rowell H
OrgDNSPhone:  +1-503-610-7743 
OrgDNSEmail:  rowell.andal@nwnatural.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

OrgDNSHandle: HARLO39-ARIN
OrgDNSName:   Harlow, Bryan 
OrgDNSPhone:  +1-360-355-0435 
OrgDNSEmail:  bryan.harlow@nwnatural.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

OrgNOCHandle: RHA368-ARIN
OrgNOCName:   Andal, Rowell H
OrgNOCPhone:  +1-503-610-7743 
OrgNOCEmail:  rowell.andal@nwnatural.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

OrgRoutingHandle: RHA368-ARIN
OrgRoutingName:   Andal, Rowell H
OrgRoutingPhone:  +1-503-610-7743 
OrgRoutingEmail:  rowell.andal@nwnatural.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

OrgTechHandle: RHA368-ARIN
OrgTechName:   Andal, Rowell H
OrgTechPhone:  +1-503-610-7743 
OrgTechEmail:  rowell.andal@nwnatural.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

OrgTechHandle: HARLO39-ARIN
OrgTechName:   Harlow, Bryan 
OrgTechPhone:  +1-360-355-0435 
OrgTechEmail:  bryan.harlow@nwnatural.com
OrgTechRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

RNOCHandle: HARLO39-ARIN
RNOCName:   Harlow, Bryan 
RNOCPhone:  +1-360-355-0435 
RNOCEmail:  bryan.harlow@nwnatural.com
RNOCRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

RAbuseHandle: HARLO39-ARIN
RAbuseName:   Harlow, Bryan 
RAbusePhone:  +1-360-355-0435 
RAbuseEmail:  bryan.harlow@nwnatural.com
RAbuseRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

RAbuseHandle: RHA368-ARIN
RAbuseName:   Andal, Rowell H
RAbusePhone:  +1-503-610-7743 
RAbuseEmail:  rowell.andal@nwnatural.com
RAbuseRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

RTechHandle: HARLO39-ARIN
RTechName:   Harlow, Bryan 
RTechPhone:  +1-360-355-0435 
RTechEmail:  bryan.harlow@nwnatural.com
RTechRef:    https://rdap.arin.net/registry/entity/HARLO39-ARIN

RTechHandle: RHA368-ARIN
RTechName:   Andal, Rowell H
RTechPhone:  +1-503-610-7743 
RTechEmail:  rowell.andal@nwnatural.com
RTechRef:    https://rdap.arin.net/registry/entity/RHA368-ARIN

RNOCHandle: RHA368-ARIN
RNOCName:   Andal, Rowell H
RNOCPhone:  +1-503-610-7743 
RNOCEmail:  rowell.andal@nwnatural.com
RNOCRef:    https://rdap.arin.net/registry/entity/RHA368-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
AS33490	Comcast Cable Communications, LLC	US
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US
AS7385	Allstream Business US, LLC	US

Upstreams

AS Number	Description	Country
AS33490	Comcast Cable Communications, LLC	US
AS701	Verizon Business	US
AS7385	Allstream Business US, LLC	US