// ASN
AS26551
SARGENT-AND-LUNDY - Sargent & Lundy Engineers, US
Detailed information about the Autonomous System. Need another one? Look up a different ASN.
- ASN
- AS26551
- Organization
- Sargent & Lundy Engineers
- Description
- SARGENT-AND-LUNDY - Sargent & Lundy Engineers, US
- Country
- US
- State / Region
- IL
- City
- Chicago
- Address
- 55 E. Monroe Street
- Registry (RIR)
- ARIN
- Created
- 2005-11-23
- Updated
- 2025-12-28
- IPv4 Prefixes
- 5
- IPv6 Prefixes
- 0
IPv4 Prefixes
5 total151.154.0.0/16 151.154.103.0/24 151.154.128.0/20 151.154.223.0/24 151.154.84.0/22
What is AS26551?
AS26551 is an Autonomous System Number (ASN) assigned to Sargent & Lundy Engineers. An ASN identifies a network or group of IP prefixes operated under a common routing policy in the BGP protocol.
Looking for more ASN data?
Use our ASN Lookup Tool for real-time WHOIS queries, or explore our API documentation to integrate ASN data into your applications.