AS51545 — ZSAH

AS51545 announces 3 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

The AS handle ZSAH is held by zsah Limited.

What it's used for

• The address space carries managed technology services infrastructure, evidenced by the reverse DNS record smtprelay.southlanarkshire.gov.uk and netnames UK-ZSAHLIMITED-20160608 and ZSAH-NET.
• The AS announces 1024 IPv4 addresses across 3 prefixes with 3 observed neighbours, indicating a small-scale business network rather than a transit or large access provider.
• Traffic from this AS consists of web and API endpoints, cloud services, and managed IT operations for private business and public sector clients.

Notable

• All registrants for the announced prefixes are zsah Limited, matching the AS holder.
• zsah Limited provides high-performance managed cloud, DevOps, and digital services for the private and public sectors.
• The inventory consists of three distinct IPv4 prefixes with no IPv6 announcements.

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

Announced prefixes

• 91.217.245.0/24
• 185.155.104.0/24
• 185.155.106.0/23

Upstream networks

• AS1299 Arelion Sweden AB
• AS25180 Exponential-E Ltd.
• AS174 Cogent Communications, LLC

Adjacent networks

• AS1299 Arelion Sweden AB
• AS25180 Exponential-E Ltd.
• AS174 Cogent Communications, LLC

Routing security

• RPKI: 4 valid, 0 invalid and 0 not-found announcements; 4 ROAs.
• ASPA: none published.
• IRR: 50% of announcements registered; 3 route objects.
• Listed in as-sets: AS-C4L, AS-EXPONENTIAL-E, AS1299:AS-TWELVE99-EU-V4.