asn.dev

Autonomous system

AS40399 MASERGY-CLOUD-COMMUNICATIONS

Unclassified ARIN

IPv4 addresses 1.79K 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Masergy Cloud Communications

United States of America · AI-generated

business telecom cloud communications

The AS handle MASERGY-CLOUD-COMMUNICATIONS is held by Masergy Cloud Communications, Inc.

What it's used for

  • The address space carries corporate and cloud communications infrastructure, evidenced by netnames MASERGY-CLOUD-COMMUNICATIONS and CBG-UC-LA-10.
  • The AS announces 1792 IPv4 addresses across 3 prefixes with only 1 observed neighbour, indicating a small, self-contained corporate estate rather than a transit or access network.
  • Traffic from this AS consists of unified communications, cloud contact center, and managed security services for enterprise clients.

Notable

  • Registrants for the largest prefixes are Masergy Cloud Communications, Inc. and CB Masergy, aligning with the announcer.
  • Masergy was acquired by Comcast on October 8, 2021.
  • The inventory consists of three contiguous IPv4 blocks within the 208.75.8.0/22 range, with no IPv6 prefixes announced.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS19855Masergy Communications, Inc.418

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 3 prefixes · 1.79K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America3

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS40399
Registry name
MASERGY-CLOUD-COMMUNICATIONS
Registrant
Masergy Cloud Communications, Inc.
Abuse contact
arin-contact@broadcore.com
Registered
2021-11-01
Last changed
2021-11-01
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 7 with no ROA
ROAs
12 authorising AS40399
ASPA
no ASPA record
IRR
29% registered · 2 of 7 announcements
Route objects
1 naming AS40399

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 1,783 prefixes, as published 2026-10-17. 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

Cross-check