AS43949 — MMC

AS43949 announces 7 IPv4 prefixes covering 19,200 addresses and 0 IPv6 prefixes.

About this network

MMC is the autonomous system for Marsh, the global professional services firm.

What it's used for

• The address space is registered to Marsh Ireland Brokers Limited under netnames IE-MARSH-19940928 and IE-MARSH-20190322, indicating internal corporate infrastructure.
• The AS announces 19,200 IPv4 addresses across 7 prefixes with only 3 observed neighbours, a ratio characteristic of a corporate estate with site-by-site segmentation rather than a transit or access network.
• Traffic from this AS consists of office workers and internal business endpoints for Marsh's insurance and risk management operations.

Notable

• All registrants for the announced prefixes are Marsh Ireland Brokers Limited, which aligns with the announcer MMC Marsh Limited.
• Marsh is a subsidiary of Marsh & McLennan Companies (MMC), a major global professional services corporation.
• The inventory consists of seven IPv4 prefixes, primarily within the 168.168.0.0/16 range, with no IPv6 prefixes in the inventory.

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

Announced prefixes

• 2.58.180.0/22
• 168.168.0.0/20
• 168.168.16.0/23
• 168.168.24.0/24
• 168.168.32.0/22
• 168.168.80.0/20
• 168.168.96.0/19

Upstream networks

• AS1273 IDDQD-AS
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS5400 British Telecommunications Limited

Adjacent networks

• AS1273 IDDQD-AS
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS5400 British Telecommunications Limited

Routing security

• RPKI: 11 valid, 0 invalid and 0 not-found announcements; 11 ROAs.
• ASPA: none published.
• IRR: 91% of announcements registered; 16 route objects.
• Listed in as-sets: AS-BT-IE, AS-BTGB-CUST, AS-CWCUSTEU, AS-EQUINIX-DB, AS-EQUINIX-LD, AS-UDOS, AS1273:AS-CWW.