Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS53309

Announcement observedARIN

Black Hills Corporation · BLACKHILLSCORP

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/4/2026, 23:19:38Snapshot expired

View network topology RDAP registration

ASN: AS53309
Registration country: United States
Name: Black Hills Corporation
Abbreviation: BLACKHILLSCORP
Registration date: 12/7/2009, 20:56:50
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
74.116.252.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 16:00:00	10/4/2026, 16:00:00	✓	×	Currently valid
74.116.253.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 16:00:00	10/4/2026, 16:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Black Hills Corporation
RIR: ARIN
Registration country: United States
Registration date: 12/7/2009, 20:56:50
Abuse contact: andy.gerlach@blackhillsenergy.com

Snapshot trend

10/4/2026, 23:19:382 v40 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn