// ASN
AS51100
KIER, GB
Detailed information about the Autonomous System. Need another one? Look up a different ASN.
- ASN
- AS51100
- Organization
- Kier Ltd - Alternative Secondary
- Description
- KIER, GB
- Country
- GB
- Registry (RIR)
- RIPE
- Created
- 2017-12-22
- Updated
- 2025-05-28
- IPv4 Prefixes
- 7
- IPv6 Prefixes
- 0
IPv4 Prefixes
7 total185.239.164.0/23 185.239.166.0/23 185.239.166.0/24 185.239.167.0/24 91.195.112.0/23 91.195.112.0/24 91.195.113.0/24
What is AS51100?
AS51100 is an Autonomous System Number (ASN) assigned to Kier Ltd - Alternative Secondary. 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.