Autonomous system
AS11523 AS-HLEEM - H. Lee Moffitt Cancer Center & Research Institute, Inc.
Unclassified ARIN
Summary
H. Lee Moffitt Cancer Center & Research Institute
enterprise research legacy
AS-HLEEM is the H. Lee Moffitt Cancer Center & Research Institute in Tampa, Florida — a nonprofit cancer hospital and NCI-designated comprehensive cancer centre. The AS carries the institute's own campus network.
What it's used for
- Clinical and research connectivity for a single institution: patient-facing systems, the hospital's public services, authoritative DNS, and research data platforms.
- RIS sees 5 announced IPv4 prefixes totalling 1,024 addresses, no IPv6, and 2 observed BGP neighbours. The five prefixes are one
206.81.164.0/22plus its four component /24s, all registered to Moffitt underA-MOFFITT-US. So the real inventory is a single /22 announced alongside its more-specifics, which is standard practice to keep the covering route while steering the pieces. It is not a sprawling multi-block inventory.
Notable
- Reverse DNS is the clearest evidence of what the space actually carries, and it is unusually informative here. Sampled addresses answer as
ns5.moffitt.organdns2.moffitt.org(the institute's own nameservers),patientreg2.moffitt.org(patient registration), andradiosensitivity.hlmcc.org— a research host named for a radiation-oncology concept. Clinical services and research hosts share the same /22. - Two BGP neighbours confirms the role: a hospital multihoming to a pair of upstreams for redundancy, with nothing sold onward.
Interesting
- One address resolves to
data.m2gen.com. M2Gen was the health-informatics company spun out of Moffitt to commercialise its clinical and molecular data work (it later rebranded as Aster Insights). A spinout still sitting inside its parent's address space is a nice example of why registrant and rDNS can name different entities without anything being wrong: the space is Moffitt's, and the names on it trace real institutional history.
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 2026-11-10, 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 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11523- Registry name
- AS-HLEEM
- Registrant
- H. Lee Moffitt Cancer Center & Research Institute, Inc.
- Abuse contact
- Tom.Tokarczyk@moffitt.org
- Registered
- 2007-05-22
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 5 with no ROA
- ROAs
- 0 authorising AS11523
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 5 naming AS11523
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: 454 networks and 1,847 prefixes, as published 2026-11-11. 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