Autonomous system profile

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

AS55102

Announcement observedARIN

NRG Energy, Inc. · NRG-NS-2

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

Last active10/5/2026, 04:57:14Snapshot expired

View network topology RDAP registration

ASN: AS55102
Registration country: United States
Name: NRG Energy, Inc.
Abbreviation: NRG-NS-2
Registration date: 3/6/2013, 20:41:09
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
158.81.128.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.136.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.150.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.152.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 08:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.154.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 08:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.154.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.192.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.199.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record
158.81.200.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/21/2026, 00:00:00	10/5/2026, 00:00:00	✓	×	Historical record

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

Registration and sources

Organization: NRG Energy, Inc.
RIR: ARIN
Registration country: United States
Registration date: 3/6/2013, 20:41:09
Abuse contact: Corp_NetOps_DL@nrg.com

Snapshot trend

10/5/2026, 04:57:149 v40 v63 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