AS21234 — GRENKE

AS21234 announces 4 IPv4 prefixes covering 3,840 addresses and 1 IPv6 prefixes.

About this network

The AS handle GRENKE is operated by Grenke Service GmbH.

What it's used for

• The address space carries corporate infrastructure, evidenced by the netname DE-GRENKE-20001016 and registrant IT Infrastructure Management; GRENKE Service GmbH.
• The AS announces 3840 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with only 2 observed neighbours, indicating a small, self-contained corporate network rather than a transit or access provider.

Notable

• All registrants for the announced prefixes are consistent with the announcer, listing GRENKE Service GmbH and IT Infrastructure Management.
• The address inventory is finely subdivided into four contiguous IPv4 blocks within the 217.25.128.0/21 range, reflecting internal site-by-site segmentation typical of a large enterprise estate.

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

Announced prefixes

• 217.25.128.0/21
• 217.25.136.0/24
• 217.25.138.0/23
• 217.25.140.0/22
• 2a07:fbc0::/32

Upstream networks

• AS12843 TelemaxX Telekommunikation GmbH
• AS12337 noris network AG

Adjacent networks

• AS12843 TelemaxX Telekommunikation GmbH
• AS12337 noris network AG