Autonomous system profile

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

AS26551

Announcement observedARIN

Sargent & Lundy Engineers · SARGENT-AND-LUNDY

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

Last active10/1/2026, 20:59:55Snapshot expired

View network topology RDAP registration

ASN: AS26551
Registration country: United States
Name: Sargent & Lundy Engineers
Abbreviation: SARGENT-AND-LUNDY
Registration date: 10/15/2002, 09:59:55
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
151.154.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/1/2026, 16:00:00	✓	×	Historical record
151.154.103.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/1/2026, 16:00:00	✓	×	Historical record
151.154.128.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/1/2026, 16:00:00	✓	×	Historical record
151.154.223.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/1/2026, 16:00:00	✓	×	Historical record
151.154.84.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/17/2026, 16:00:00	10/1/2026, 16:00:00	✓	×	Historical record

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

Registration and sources

Organization: Sargent & Lundy Engineers
RIR: ARIN
Registration country: United States
Registration date: 10/15/2002, 09:59:55
Abuse contact: mohammed.chouikh@sargentlundy.com

Snapshot trend

10/1/2026, 20:59:555 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