AS4249 — LILLY-AS

AS4249 announces 36 IPv4 prefixes covering 3,866,624 addresses and 0 IPv6 prefixes.

About this network

Autonomous System 4249 (LILLY-AS) is registered to Eli Lilly and Company, the pharmaceutical manufacturer headquartered in Indianapolis, Indiana.

What it's used for

• Corporate network connectivity for Lilly's global operations: offices, research sites, and manufacturing facilities.

Notable

• Corporate address space, not consumer space. An IP here is a Lilly system or a Lilly employee behind the company's network edge.
• Lilly is a legacy holder of an unusually large IPv4 allocation inside the 40.0.0.0/8 range, and this AS originates several million addresses out of it. That is far more address space than the company's headcount would suggest, and is a reflection of how the earliest allocations were sized, not of network size today.

Interesting

• Pharmaceutical and industrial firms were among the earliest commercial holders of large IPv4 blocks, having connected in the era when a company could simply ask for a Class A-sized range.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 40.0.0.0/14
• 40.6.0.0/16
• 40.8.0.0/14
• 40.12.0.0/15
• 40.15.0.0/16
• 40.28.0.0/14
• 40.44.0.0/16
• 40.46.0.0/16
• 40.49.0.0/16
• 40.50.0.0/15
• 40.52.0.0/15
• 40.55.0.0/16
• 40.56.0.0/16
• 40.58.0.0/15
• 40.60.0.0/14
• 40.144.0.0/15
• 40.147.0.0/16
• 40.151.0.0/16
• 40.156.0.0/16
• 40.184.0.0/15
• 40.190.0.0/15
• 40.197.0.0/16
• 40.198.0.0/15
• 40.200.0.0/16
• 40.204.0.0/16
• 40.206.0.0/15
• 40.209.0.0/16
• 40.213.0.0/16
• 40.226.0.0/16
• 40.228.0.0/16
• 40.231.0.0/16
• 40.232.0.0/16
• 40.236.0.0/16
• 40.248.0.0/16
• 40.250.0.0/15
• 40.254.0.0/15

Upstream networks

• AS32787 Akamai Technologies, Inc.
• AS2687 AT&T Enterprises, LLC
• AS2686 AT&T Enterprises, LLC
• AS7018 AT&T Enterprises, LLC
• AS4812 China Telecom (Group)

Adjacent networks

• AS32787 Akamai Technologies, Inc.
• AS2687 AT&T Enterprises, LLC
• AS2686 AT&T Enterprises, LLC
• AS7018 AT&T Enterprises, LLC
• AS4812 China Telecom (Group)