Autonomous system
AS40089 BULLHORN-INC-BOSTON
Unclassified ARIN
Summary
Bullhorn
business saas crm cloud
BULLHORN-INC-BOSTON is operated by Bullhorn Inc.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by netnames
BULLH-1andBHWCregistered to Bullhorn Inc. - The AS announces 2048 IPv4 addresses across 2 prefixes and maintains 8 observed neighbours, a ratio consistent with a business network rather than a transit or access provider.
- Traffic from this AS consists of web and API endpoints for Bullhorn's cloud-based customer relationship management and applicant tracking systems.
Notable
- Registrants for both announced prefixes,
52.129.16.0/22and204.62.52.0/22, are listed as Bullhorn Inc., matching the AS holder. - The address inventory is compact, consisting of two /22 blocks totaling 2048 addresses, with no IPv6 prefixes in 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 2026-10-22, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 2.05K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS40089- Registry name
- BULLHORN-INC-BOSTON
- Registrant
- Bullhorn Inc.
- Abuse contact
- btooncall@bullhorn.com
- Registered
- 2006-06-22
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS40089
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 6 naming AS40089
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 1,779 prefixes, as published 2026-10-23. 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