206208 looking glass

AS15157 NORTHWESTERN CORPORATION 🇺🇸 US

Announcing 3 prefixes, seen at the RIS collectors.

IPv4 prefixes
3
768 (3 × /24)
IPv6 prefixes
0
-
Upstreams
2
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS15157
Name
NORTHWESTERN CORPORATION
Organisation
NORTHWESTERN CORPORATION
Country
🇺🇸 US
RIR
ARIN
Allocated
2000-03-27

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

0 valid (0.0%) 0 invalid (0.0%) 3 no ROA (100.0%)

Whois

Fetched from whois.arin.net

ASNumber:       15157
ASName:         NORWORLD
ASHandle:       AS15157
RegDate:        2000-03-27
Updated:        2012-03-02
Ref:            https://rdap.arin.net/registry/autnum/15157

OrgName:        NORTHWESTERN CORPORATION
OrgId:          NORTHW-28
Address:        125 S. Dakota Ave.
City:           Sioux Falls
StateProv:      SD
PostalCode:     57104
Country:        US
RegDate:        1999-10-22
Updated:        2026-10-26
Ref:            https://rdap.arin.net/registry/entity/NORTHW-28

OrgTechHandle: WILSO1898-ARIN
OrgTechName:   Wilson, Theron
OrgTechPhone:  +1-406-497-1652
OrgTechEmail:  theron.wilson@northwestern.com
OrgTechRef:    https://rdap.arin.net/registry/entity/WILSO1898-ARIN

OrgAbuseHandle: SC1244-ARIN
OrgAbuseName:   Cleverly, Sean
OrgAbusePhone:  +1-406-497-4131
OrgAbuseEmail:  Sean.Cleverly@northwestern.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SC1244-ARIN

OrgRoutingHandle: SC1244-ARIN
OrgRoutingName:   Cleverly, Sean
OrgRoutingPhone:  +1-406-497-4131
OrgRoutingEmail:  Sean.Cleverly@northwestern.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/SC1244-ARIN

RTechHandle: SC1244-ARIN
RTechName:   Cleverly, Sean
RTechPhone:  +1-406-497-4131
RTechEmail:  Sean.Cleverly@northwestern.com
RTechRef:    https://rdap.arin.net/registry/entity/SC1244-ARIN

RAbuseHandle: SC1244-ARIN
RAbuseName:   Cleverly, Sean
RAbusePhone:  +1-406-497-4131
RAbuseEmail:  Sean.Cleverly@northwestern.com
RAbuseRef:    https://rdap.arin.net/registry/entity/SC1244-ARIN

RTechHandle: LHG8-ARIN
RTechName:   Gates, Lorrie H
RTechPhone:  +1-406-497-2870
RTechEmail:  lorrie.gates@northwestern.com
RTechRef:    https://rdap.arin.net/registry/entity/LHG8-ARIN