Autonomous system
AS43949 MMC
Unclassified RIPE
Summary
Marsh
insurance corporate business
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-19940928andIE-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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 19.20K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS43949- Registry name
- MMC
- Registrant
- MMC-MNT
- Abuse contact
- andrew.roberts@marsh.com
- Registered
- 2007-10-25
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 11 valid, 0 with no ROA
- ROAs
- 11 authorising AS43949
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 16 naming AS43949
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,784 prefixes, as published 2026-10-19. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere