AS55819 — CAMPAIGNMONITOR-AS-GLOBAL - CAMPAIGN MONITOR PTY LTD

Network type: hosting

AS55819 announces 11 IPv4 prefixes covering 6,400 addresses and 1 IPv6 prefixes.

About this network

CAMPAIGNMONITOR-AS-GLOBAL is held by Campaign Monitor Pty Ltd.

What it's used for

• The address space carries outbound email infrastructure, evidenced by reverse DNS entries such as mx254.g.outbound.createsend.com and cmail17.com.
• The AS announces 6400 IPv4 addresses across 11 prefixes and 1 IPv6 prefix, with only 3 observed neighbours, indicating a dedicated corporate network rather than a transit or access provider.
• Traffic from this AS consists of bulk email delivery and marketing campaign services for the company's SaaS platform.

Notable

• All registrants for the announced prefixes are CAMPAIGN MONITOR PTY LTD, matching the AS holder.
• The address inventory is finely subdivided into multiple /24 and /23 blocks, consistent with an internal corporate estate segmented by function or site.

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

Announced prefixes

• 27.126.144.0/21
• 103.28.40.0/22
• 146.88.16.0/23
• 146.88.18.0/24
• 146.88.28.0/24
• 180.189.136.0/22
• 203.55.21.0/24
• 203.55.138.0/24
• 204.75.142.0/24
• 205.166.177.0/24
• 216.99.201.0/24
• 2404:de00::/32

Upstream networks

• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 17 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 71% of announcements registered; 17 route objects.
• Listed in as-sets: AS-CAMPAIGNMONITOR, AS-CAMPAIGNMONITOR, AS-CM, AS-HURRICANE, AS-HURRICANEV6, AS-PEAK10_CUSTOMERS, AS32421:AS-CUSTOMERS.

Internet exchanges

• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States