Autonomous system
AS10359 EPICSYS
Unclassified ARIN
Summary
Epic Systems
business enterprise healthcare software
EPICSYS is Epic Systems Corporation, the privately-held healthcare software company in Verona, Wisconsin whose electronic health record runs a large share of US hospital systems. This is Epic's own corporate network, not a product platform.
What it's used for
- Corporate connectivity for Epic's Verona campus: staff internet egress, the company's public-facing services, and border infrastructure.
- The sampled reverse DNS says exactly this.
ub3-1-border-2.epic.comis a border router, andpat-verona-5.epic.comnames a PAT (port-address-translation) address at the Verona campus — that is outbound NAT for corporate users, which is a workplace network's most characteristic artefact.
Notable
- Enterprise, decisively. RIS sees a single IPv4 prefix (
199.204.56.0/22, 1,024 addresses) and one IPv6/48(2620:72::/48), announced across 3 observed BGP neighbours. Three upstreams for one/22is a company that wants redundant internet for its own site and nothing more. There is no customer cone, no hosting fragmentation, and no subscriber pool. - The tiny address footprint is itself informative: Epic's scale lives inside its customers' hospital data centres and in its own private connectivity, not in publicly-routed space.
Interesting
- A
/22and a/48is a modest routing presence for a company of Epic's size and criticality — a good reminder that announced address volume measures a network's public surface, not the organisation behind it.
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 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 1.02K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10359- Registry name
- EPICSYS
- Registrant
- Epic Systems Corporation
- Abuse contact
- hostmaster@epic.com
- Registered
- 2010-04-12
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 1 authorising AS10359
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 6 naming AS10359
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 1,771 prefixes, as published 2026-10-15. 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