Autonomous system
AS10551 RAPID-CITY-REGIONAL
Unclassified ARIN
Summary
Monument Health Rapid City Hospital, Inc.
enterprise legacy
The ASN of Monument Health Rapid City Hospital, a hospital and health system in Rapid City, South Dakota. The handle RAPID-CITY-REGIONAL preserves the organisation's earlier name, Rapid City Regional Hospital.
What it's used for
A healthcare enterprise network. RIS sees one announced IPv4 prefix, 198.199.195.0/24 (256 addresses), no IPv6, and two observed neighbours. This is a hospital's public edge, not a service provider.
The reverse DNS is the interesting detail and it needs reading carefully. Sampled addresses come back as 198-199-195-5-static.midco.net and 198-199-195-133-static.midco.net. Midco is Midcontinent Communications, the regional cable and broadband operator across the Dakotas and Minnesota. That does not make this Midco's network. The block is registered to the hospital and announced by the hospital's own ASN; what the PTRs show is that the hospital's upstream is generating default reverse names for the space out of its own zone. A customer block very often wears its provider's rDNS, and mistaking that for ownership is one of the easiest errors to make.
The static label is meaningful in a different way: it says these are fixed assignments, not a dynamic subscriber pool, which is exactly what a hospital's public-facing systems would need.
Notable
Two neighbours and a single /24 says the organisation buys connectivity, probably from more than one provider for resilience, and announces the small block it needs to be reachable. Clinical systems and patient data do not live in the routed table.
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 2026-10-16, 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 · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10551- Registry name
- RAPID-CITY-REGIONAL
- Registrant
- Monument Health Rapid City Hospital, Inc.
- Abuse contact
- jgebhard@monument.health
- Registered
- 2005-05-04
- Last changed
- 2022-04-25
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS10551
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS10551
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 1,783 prefixes, as published 2026-10-17. 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