Autonomous system
AS21534 AS21534 - BroadSoft, Inc.
Unclassified ARIN
Summary
BroadSoft
business voip cisco software
AS21534 is operated by BroadSoft, Inc., a communication software provider now part of Cisco.
What it's used for
- The address space carries corporate and service infrastructure, evidenced by netnames such as
BROADSOFT-ADAPTION,BA-398, andBROADSOFT-NORTH-AMERICA. - With 6400 IPv4 addresses announced across 13 prefixes and 16 observed neighbours, the inventory suggests an internal corporate estate or service provider network rather than a transit hub.
Notable
- Registrants include BroadSoft, Inc., Cisco Webex LLC, and Adaption Technologies Ventures, Ltd., reflecting the company's acquisition by Cisco and the integration of its assets.
- BroadSoft was acquired by Cisco Systems in 2018, leading to the rebranding of its services under the Cisco Webex umbrella.
- The address inventory is subdivided into multiple /22, /23, and /24 blocks, indicating site-by-site or service-specific segmentation.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX Australia (Sydney NSW) | Sydney, Australia | 218.100.52.39 |
Transit providers
11 upstream, 0 downstream and 17 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 13 prefixes · 6.40K addresses IPv6 5 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 18 |
Registry
Allocation record
- Registry
- ARIN
- Registered
- 2015-07-09
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- BroadSoft
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 18% valid · 6 valid, 27 with no ROA
- ROAs
- 12 authorising AS21534
- ASPA
- no ASPA record
- IRR
- 82% registered · 27 of 33 announcements
- Route objects
- 48 naming AS21534
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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