AS21405 — TSS1

AS21405 announces 3 IPv4 prefixes covering 2,048 addresses and 1 IPv6 prefixes.

About this network

The AS handle TSS1 is operated by T-Systems Schweiz AG.

What it's used for

• The address space is registered under netnames CH-TSS-20160523, T-Systems-Schweiz-AG, and ADDS, all attributed to T-Systems Schweiz AG.
• The AS announces 2048 IPv4 addresses across 3 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a small, self-contained corporate network rather than a transit or access provider.

Notable

• All RDAP registrants for the announced prefixes are T-Systems Schweiz AG, consistent with the AS holder.
• The address inventory consists of three distinct IPv4 blocks (185.153.104.0/22, 138.124.232.0/23, 193.108.232.0/23) and one IPv6 prefix (2a07:8700::/29), reflecting a segmented internal estate.

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

Announced prefixes

• 138.124.232.0/23
• 185.153.104.0/22
• 193.108.232.0/23
• 2a07:8700::/29

Upstream networks

• AS6730 Sunrise GmbH

Adjacent networks

• AS6730 Sunrise GmbH