Autonomous system
AS6071 UNISYS-AS-E - Unisys Corporation
Unclassified ARIN
Summary
Unisys Corporation
enterprise legacy
UNISYS-AS-E is one of several autonomous systems run by Unisys Corporation, the American IT services and enterprise-computing company. It carries part of Unisys's own corporate and customer-facing network.
What it's used for
- Corporate connectivity for Unisys itself and for the outsourced IT and managed services it runs on behalf of clients.
- All of its announced space sits inside
129.220.0.0/16, a block registered to Unisys — this is company-owned addressing, not resold or leased space.
Notable
- An enterprise network, not a commercial ISP: the addresses here belong to a single company's infrastructure and hosted client systems.
- Unisys operates a sibling AS, AS6072 (
UNISYS-AS-C), and the two split the company's routing rather than representing different businesses.
Interesting
- ARIN registered this number to Unisys in November 1995, in the same sequential run as its sibling — a genuine mid-1990s allocation from the era when large enterprises routinely ran their own AS.
- Unisys traces back to the 1986 merger of Burroughs and Sperry, two of the original mainframe makers, and still supports ClearPath mainframes alongside modern cloud and security services.
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 2026-11-03, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 16 prefixes · 19.46K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 16 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS6071- Registry name
- UNISYS-AS-E
- Registrant
- Unisys Corporation
- Abuse contact
- hostmaster@unisys.com
- Registered
- 1995-11-02
- Last changed
- 2012-06-01
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 9 with no ROA
- ROAs
- 0 authorising AS6071
- ASPA
- no ASPA record
- IRR
- 100% registered · 9 of 9 announcements
- Route objects
- 12 naming AS6071
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: 448 networks and 1,851 prefixes, as published 2026-11-04. 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