Autonomous system
AS11200 REGISU
Education ARIN
Summary
Regis University
education university legacy
REGISU is Regis University, a private Jesuit university in Denver, Colorado. ARIN registers the ASN to the university at 3333 Regis Blvd, Denver.
What it's used for
Campus networking. RIS observes two IPv4 prefixes — 50.236.76.0/24 and 207.93.211.0/24, 512 addresses in total — no IPv6, and two BGP neighbours. Two upstreams and two /24s is the standard shape for a small multihomed campus: enough to keep the university's public-facing services (web, mail, VPN, portals for online and adult-learner programmes) reachable if one circuit fails, and nothing more.
Notable
Neither prefix is registered to the university. 50.236.76.0/24 belongs to a Comcast block and 207.93.211.0/24 to a Level 3 / Lumen block — both are provider-assigned space, allocated to the university by its upstreams and announced from its own AS number. That is entirely ordinary for an organisation that never held direct ARIN allocations, and it is a useful counter-example to the address-broker pattern: third-party prefix registrants are only suspicious when the registrants are unrelated shells. Here they are the university's own transit providers, which is the innocent explanation and the correct one.
The AS number was registered with ARIN in 2010, so the low number is not evidence of a long-lived network. Numbers in this range circulate.
Interesting
Announcing provider-assigned space from your own ASN is what lets a customer keep its addresses reachable through a second, unrelated carrier — the reason a 512-address network bothers with BGP at all.
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 2026-10-27, 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 · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11200- Registry name
- REGISU
- Registrant
- Regis University
- Abuse contact
- cmelvill@regis.edu
- Registered
- 2010-12-06
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 50% valid · 1 valid, 1 with no ROA
- ROAs
- 1 authorising AS11200
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements
- Route objects
- 0 naming AS11200
Reputation
Classification and threat
Education University, school or national research and education network.
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: 447 networks and 1,852 prefixes, as published 2026-10-27. 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