AS13043 — BAYER-AS

AS13043 announces 19 IPv4 prefixes covering 177,152 addresses and 0 IPv6 prefixes.

About this network

A pharmaceutical company's network where half the blocks still carry an acquired firm's name.

What it's used for

• The corporate network of a German pharmaceutical and chemical company. 177,152 addresses across 42 IPv4 prefixes, three observed BGP neighbours, and no IPv6 announced.

Notable

• Netnames split between the holder's own (Bayer, Bayer-LEV) and another company's (SCHERING1, SCHERING2, SCHERING-A).
• Every block lists the same registry contacts: Bayer Admin Contact Persons and Bayer Tech Contact Persons.
• Eighteen addresses were sampled and none returned a name.
• Three observed BGP neighbours for 42 prefixes.

Interesting

• The acquired company's name on the largest blocks is the most durable trace of a merger anywhere in these records. Registrant fields were updated to the new owner; the netnames were not, because nothing breaks if they stay wrong. The registry ends up as a slow archive of corporate history.
• The contact objects are named in the plural, as groups of persons rather than a role or a mailbox. Most holders register a single abuse role; naming a set of people is a older convention that predates the shared-mailbox habit.
• Two netnames use mixed case where nearly every record in this range is uppercase throughout.
• Forty-two prefixes and no reverse names at all. A private corporate network announces its space so it is reachable from its own remote sites, and publishes nothing about what lives there.

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

Announced prefixes

• 149.234.8.0/21
• 149.234.16.0/20
• 149.234.32.0/19
• 149.234.64.0/19
• 149.234.96.0/20
• 149.234.112.0/21
• 149.234.120.0/22
• 149.234.126.0/24
• 164.59.0.0/17
• 164.59.128.0/20
• 164.59.146.0/23
• 164.59.148.0/22
• 164.59.152.0/21
• 164.59.160.0/19
• 164.59.192.0/18
• 164.60.0.0/16
• 193.202.128.0/19
• 195.47.249.0/24
• 212.64.224.0/19

Upstream networks

• AS32787 Akamai Technologies, Inc.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS702 Verizon Business

Adjacent networks

• AS32787 Akamai Technologies, Inc.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS702 Verizon Business

Routing security

• RPKI: 13 valid, 0 invalid and 18 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 36 route objects.
• Listed in as-sets: AS-EQUINIX-FR, AS-PROLE, AS-TELSTRA-INTL-CUSTOMERS, AS-VIAG, AS-VIAG, AS198949:AS-SD.